Supported OS and software versions

The following tables detail the operating system and software package versions that are supported on IBM Storage Scale. Only the most recent versions of IBM Storage Scale releases are listed. If you need information about earlier versions, see Archived support information for IBM Storage Scale.

IBM Storage Scale is not supported on OS versions that are out of support by the OS vendor. Use the following tables for the supported versions:

Note:

• Before you implement any kernel changes, always check the FAQ section. Only update the kernel version when the version is explicitly listed in the FAQ as tested and supported. Kernel errata can be applied to the current kernel version unless they are explicitly listed in the FAQ as not supported. Always validate kernel changes including errata with IBM Storage Scale in a test environment before rolling out to production. Always rebuild the portability layer after any kernel changes.
• NIS authentication is not supported in RHEL 9.
• Dynatrace cannot be used on IBM Storage Scale on AIX due to built-in memory tracking. Unstable behavior including crashes will occur.

Table 19. IBM Storage Scale 5.2.0: Tested software versions and latest tested kernels for Linux²

Architecture	RHEL1 8.6 8.8 8.9	RHEL1 9.04, 5 9.2 9.3	Ubuntu 20.046, 7 20.04.5 20.04.6	Ubuntu 22.046, 7 22.04.2 22.04.3 22.04.4	SLES 15 SP5
x86_64	RHEL 8.6: 4.18.0-372.98.1.el8_6 RHEL 8.8: 4.18.0-477.51.1.el8_8 RHEL 8.9: 4.18.0-513.24.1.el8_9 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	RHEL 9.0: 5.14.0-70.93.2.el9_0 RHEL 9.2: 5.14.0-284.59.1.el9_2 RHEL 9.3 5.14.0-362.24.1.el9_3 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	Ubuntu 20.04: 5.4.0-147-generic Ubuntu 20.04.5: 5.4.0-139-generic Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	Ubuntu 22.04: 5.15.0-27-generic Ubuntu 22.04.2: 5.15.0-78-generic Ubuntu 22.04.3: 5.15.0-94-generic Ubuntu 22.04.4: 5.15.0-97-generic SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	SLES 15 SP5: 5.14.21-150500.55.52.1 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)
Power LE	RHEL 8.6: 4.18.0- 372.64.1.el8_6 RHEL 8.8: 4.18.0-477.51.1.el8_8 RHEL 8.9: 4.18.0-513.24.1.el8_9 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	RHEL 9.0: 5.14.0- 70.36.1.el9_0 RHEL 9.2: 5.14.0-284.11.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.5: 5.4.0-146-generic Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)		SLES 15 SP5: 5.14.21-150500.53-default
Linux on Z3	RHEL 8.6: 4.18.0-372 RHEL 8.8: 4.18.0-477.21.1.el8_8 RHEL 8.9: 4.18.0-513.18.1.el8_9 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	RHEL 9.0: 5.14.0-284.18.1.el9_2 RHEL 9.2: 5.14.0-284.30.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)	No plan to support	No plan to support	SLES 15 SP5: 5.14.21-150500.55.44.1 SMB: 4.17.12 4-1 NFS: 5.7 (ibm 017.00)
ARM 648	No plan to support.	RHEL 9.3 5.14.0-362.18.1.el9_3.aarch64+64k 5.14.0-362.18.1.el9_3.aarch64	No plan to support.	Ubuntu 22.04.x 5.15.0-97-generic linux-signatures-nvidia-6.2.0-1015-nvidia linux-signatures-nvidia-6.2.0-1015-nvidia-64k	No plan to support.

Table 20. IBM Storage Scale 5.2.0: Tested software versions and latest tested kernels for Windows and AIX

AIX 7.2	AIX 7.3	Windows 10 (>= version 1809, OS Build 17763)	Windows 11 (>= OS Build 22000)	Windows Server 2019 (>= version 1809, OS Build 17763)	Windows Server 2022 (>= OS Build 20348)
TL 4	TL 0
TL 5	TL 1
	TL 2 7300-02-01-2346

1. Red Hat® live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.2.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Leap upgrade from RHEL 8 to 9 with IBM Storage Scale installed is not supported.
5. For RHEL 9, openssh-server-8.7p1-10.el9 or later is required (RHBA-2022:6598 - Bug Fix Advisory ).
6. Only the Ubuntu Server edition is supported.
7. Only the default, non-rolling generic kernel image for the Ubuntu Server edition is supported. Ubuntu Hardware Enablement (Ubuntu HWE) kernels and others are not supported with IBM Storage Scale.
8. The following page size kernels are supported for Advanced RISC Machine (ARM) architectures:
   • 4k and 64k for RHEL 9
   • Ubuntu 4k or 64k for Ubuntu 22.04.x
   • Nvidia 4k or 64k for Ubuntu 22.04.x

Table 21. IBM Storage Scale 5.1.9.3: Tested software versions and latest tested kernels for Linux²

Architecture	RHEL1 7.9	RHEL1 8.6 8.8 8.9	RHEL1 9.04, 5 9.2 9.3	Ubuntu 20.046, 7 20.04.5 20.04.6	Ubuntu 22.046, 7 22.04.2 22.04.3 22.04.4	SLES 15 SP5
x86_64	RHEL 7.9: 3.10.0-1160.118.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	RHEL 8.6: 4.18.0-372.98.1.el8_6 RHEL 8.8: 4.18.0-477.51.1.el8_8 RHEL 8.9: 4.18.0-513.24.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	RHEL 9.0: 5.14.0-70.93.2.el9_0 RHEL 9.2: 5.14.0-284.59.1.el9_2 RHEL 9.3 5.14.0-362.24.1.el9_3 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	Ubuntu 20.04: 5.4.0-147-generic Ubuntu 20.04.5: 5.4.0-139-generic Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	Ubuntu 22.04: 5.15.0-27-generic Ubuntu 22.04.2: 5.15.0-78-generic Ubuntu 22.04.3: 5.15.0-94-generic Ubuntu 22.04.4: 5.15.0-97-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	SLES 15 SP5: 5.14.21-150500.55.52.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)
Power LE	RHEL 7.9: 3.10.0-1160.118.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	RHEL 8.6: 4.18.0- 372.64.1.el8_6 RHEL 8.8: 4.18.0-477.51.1.el8_8 RHEL 8.9: 4.18.0-513.24.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	RHEL 9.0: 5.14.0- 70.36.1.el9_0 RHEL 9.2: 5.14.0-284.11.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.5: 5.4.0-146-generic Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)		SLES 15 SP5: 5.14.21-150500.53-default
Linux on Z3	RHEL 7.9: 3.10.0-1160.102.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	RHEL 8.6: 4.18.0-372 RHEL 8.8: 4.18.0-477.21.1.el8_8 RHEL 8.9: 4.18.0-513.18.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	RHEL 9.0: 5.14.0-284.18.1.el9_2 RHEL 9.2: 5.14.0-284.30.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)	No plan to support	No plan to support	SLES 15 SP5: 5.14.21-150500.55.44.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.14)

Table 22. IBM Storage Scale 5.1.9.3: Tested software versions and latest tested kernels for Windows and AIX

AIX 7.2	AIX 7.3	Windows 10 (>= version 1809, OS Build 17763)	Windows 11 (>= OS Build 22000)	Windows Server 2019 (>= version 1809, OS Build 17763)	Windows Server 2022 (>= OS Build 20348)
TL 4	TL 0
TL 5	TL 1
	TL 2 7300-02-01-2346

Table 23. IBM Storage Scale 5.1.9.2: Tested software versions and latest tested kernels for Linux²

Architecture	RHEL1 7.9	RHEL1 8.6 8.8 8.9	RHEL1 9.04, 5 9.2 9.3	Ubuntu 20.046, 7 20.04.5 20.04.6	Ubuntu 22.046, 7 22.04.2 22.04.3	SLES 15 SP5
x86_64	RHEL 7.9: 3.10.0-1160.118.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	RHEL 8.6: 4.18.0-372.98.1.el8_6 RHEL 8.8: 4.18.0-477.51.1.el8_8 RHEL 8.9: 4.18.0-513.24.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	RHEL 9.0: 5.14.0-70.93.2.el9_0 RHEL 9.2: 5.14.0-284.59.1.el9_2 RHEL 9.3 5.14.0-362.24.1.el9_3 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	Ubuntu 20.04: 5.4.0-147-generic Ubuntu 20.04.5: 5.4.0-139-generic Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	Ubuntu 22.04: 5.15.0-27-generic Ubuntu 22.04.2: 5.15.0-78-generic Ubuntu 22.04.3: 5.15.0-94-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	SLES 15 SP5: 5.14.21-150500.55.52.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)
Power LE	RHEL 7.9: 3.10.0-1160.118.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	RHEL 8.6: 4.18.0- 372.64.1.el8_6 RHEL 8.8: 4.18.0-477.51.1.el8_8 RHEL 8.9: 4.18.0-513.24.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	RHEL 9.0: 5.14.0- 70.36.1.el9_0 RHEL 9.2: 5.14.0-284.11.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.5: 5.4.0-146-generic Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)		SLES 15 SP5: 5.14.21-150500.53-default
Linux on Z3	RHEL 7.9: 3.10.0-1160.102.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	RHEL 8.6: 4.18.0-372 RHEL 8.8: 4.18.0-477.21.1.el8_8 RHEL 8.9: 4.18.0-513.18.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	RHEL 9.0: 5.14.0-284.18.1.el9_2 RHEL 9.2: 5.14.0-284.30.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)	No plan to support	No plan to support	SLES 15 SP5: 5.14.21-150500.55.44.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.13)

Table 24. IBM Storage Scale 5.1.9.2: Tested software versions and latest tested kernels for Windows and AIX

AIX 7.2	AIX 7.3	Windows 10 (>= version 1809, OS Build 17763)	Windows 11 (>= OS Build 22000)	Windows Server 2019 (>= version 1809, OS Build 17763)	Windows Server 2022 (>= OS Build 20348)
TL 4	TL 0
TL 5	TL 1
	TL 2 7300-02-01-2346

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Leap upgrade from RHEL 8 to 9 with IBM Storage Scale installed is not supported.
5. For RHEL 9, openssh-server-8.7p1-10.el9 or later is required (RHBA-2022:6598 - Bug Fix Advisory ).
6. Only the Ubuntu Server edition is supported.
7. Only the default, non-rolling generic kernel image for the Ubuntu Server edition is supported. Ubuntu Hardware Enablement (Ubuntu HWE) kernels and others are not supported with IBM Storage Scale.

Table 25. IBM Storage Scale 5.1.9.1: Tested software versions and latest tested kernels for Linux²

Architecture	RHEL1 7.9	RHEL1 8.6 8.8 8.9	RHEL1 9.04,  5 9.2 9.3	Ubuntu 20.046, 7 20.04.5 20.04.6	Ubuntu 22.046, 7 22.04.2 22.04.3	SLES 15 SP4 SP5
x86_64	RHEL 7.9: 3.10.0-1160.108.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	RHEL 8.6: 4.18.0-372.80.1.el8_6 RHEL 8.8: 4.18.0-477.36.1.el8_8 RHEL 8.9: 4.18.0-513.11.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	RHEL 9.0: 5.14.0- 70.80.1.el9_0 RHEL 9.2: 5.14.0-284.40.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	Ubuntu 20.04: 5.4.0-147-generic Ubuntu 20.04.5: 5.4.0-139-generic Ubuntu 20.04.6: 5.4.0-169-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	Ubuntu 22.04: 5.15.0-27-generic Ubuntu 22.04.2: 5.15.0-78-generic Ubuntu 22.04.3: 5.15.0-88-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	SLES 15 SP4: 5.14.21-150400.24.100.2 SLES 15 SP5: 5.14.21-150500.55.44.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)
Power LE	RHEL 7.9: 3.10.0-1160.105.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	RHEL 8.6: 4.18.0- 372.64.1.el8_6 RHEL 8.8: 4.18.0-477.36.1.el8_8 RHEL 8.9: 4.18.0-513.9.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	RHEL 9.0: 5.14.0- 70.36.1.el9_0 RHEL 9.2: 5.14.0-284.11.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.5: 5.4.0-146-generic Ubuntu 20.04.6: 5.4.0-167-generic SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)		SLES 15 SP4: 5.14.21-150400.24.28.1 SLES 15 SP5: 5.14.21-150500.53-default
Linux on Z3	RHEL 7.9: 3.10.0-1160.102.1.el7 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	RHEL 8.6: 4.18.0-372 RHEL 8.8: 4.18.0-477.21.1.el8_8 RHEL 8.9: 4.18.0-513.9.1.el8_9 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	RHEL 9.0: 5.14.0-284.18.1.el9_2 RHEL 9.2: 5.14.0-284.30.1.el9_2 RHEL 9.3 5.14.0-362.8.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)	No plan to support	No plan to support	SLES 15 SP4: 5.14.21-150400.24.100.2 SLES 15 SP5: 5.14.21-150500.55.44.1 SMB: 4.17.12 4-1 NFS: 4.3 (ibm 073.11)

Table 26. IBM Storage Scale 5.1.9.1: Tested software versions and latest tested kernels for Windows and AIX

AIX 7.2	AIX 7.3	Windows 10 (>= version 1809, OS Build 17763)	Windows 11 (>= OS Build 22000)	Windows Server 2019 (>= version 1809, OS Build 17763)	Windows Server 2022 (>= OS Build 20348)
TL 4	TL 0
TL 5	TL 1
	TL 2 7300-02-01-2346

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Leapp upgrade from RHEL 8 to 9 with IBM Storage Scale installed is not supported.
5. For RHEL 9, openssh-server-8.7p1-10.el9 or later is required (RHBA-2022:6598 - Bug Fix Advisory ).
6. Only the Ubuntu Server edition is supported.
7. Only the default, non-rolling generic kernel image for the Ubuntu Server edition is supported. Ubuntu Hardware Enablement (Ubuntu HWE) kernels and others are not supported with IBM Storage Scale.

Table 27. IBM Storage Scale 5.1.8.1: Tested software versions and latest tested kernels for Linux²

Architecture	RHEL1 7.94	RHEL1 8.6 8.8	RHEL1 9.05, 6 9.2	Ubuntu 20.047, 8 20.04.5 20.04.6	Ubuntu 22.047, 8 22.04.2 22.04.3	SLES 15 SP4 SP5
x86_64	RHEL 7.9: 3.10.0-1160.102.1.el7 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	RHEL 8.6: 4.18.0-372.70.1.el8_6 RHEL 8.8: 4.18.0-477.27.1.el8_8 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22) Object: 5.1.1	RHEL 9.0: 5.14.0- 70.70.1.el9_0 RHEL 9.2: 5.14.0-284.30.1.el9_2 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	Ubuntu 20.04: 5.4.0-147-generic Ubuntu 20.04.5: 5.4.0-139-generic Ubuntu 20.04.6: 5.4.0-166-generic SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	Ubuntu 22.04: 5.15.0-27-generic Ubuntu 22.04.2: 5.15.0-78-generic Ubuntu 22.04.3: 5.15.0-82-generic SMB: 4.17.5 1-3 NFS: 4.3 (ibm 071.22)	SLES 15 SP4: 5.14.21-150400.24.92.1 SLES 15 SP5: 5.14.21-150500.53-default SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)
Power LE	RHEL 7.9: 3.10.0-1160.99.1.el7 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	RHEL 8.6: 4.18.0- 372.64.1.el8_6 RHEL 8.8: 4.18.0-477.27.1.el8_8 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22) Object: 5.1.1	RHEL 9.0: 5.14.0- 70.36.1.el9_0 RHEL 9.2: 5.14.0-284.11.1.el9_2 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.5: 5.4.0-146-generic Ubuntu 20.04.6: 5.4.0-163-generic SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)		SLES 15 SP4: 5.14.21-150400.24.28.1 SLES 15 SP5: 5.14.21-150500.53-default
Linux on Z3	RHEL 7.9: 3.10.0-1160.102.1.el7 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	RHEL 8.6: 4.18.0-372 RHEL 8.8: 4.18.0-477.21.1.el8_8 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	RHEL 9.0: 5.14.0-284.18.1.el9_2 RHEL 9.2: 5.14.0-284.30.1.el9_2 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)	No plan to support	No plan to support	SLES 15 SP4: 5.14.21-150400.24.92.1 SLES 15 SP5: 5.14.21-150500.53-default SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.22)

Table 28. IBM Storage Scale 5.1.8.1: Tested software versions and latest tested kernels for Windows and AIX

AIX 7.2	AIX 7.3	Windows 10 (>= version 1809, OS Build 17763)	Windows 11 (>= OS Build 22000)	Windows Server 2019 (>= version 1809, OS Build 17763)	Windows Server 2022 (>= OS Build 20348)
TL 4	TL 0 7300-00-00-0000
TL 5	TL 1

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Support for RHEL 7 (POWER9) stopped from version 7.6. If you need to upgrade, see What is IBM POWER9 Systems compatibility mode?.
5. Leapp upgrade from RHEL 8 to 9 with IBM Storage Scale installed is not supported.
6. For RHEL 9, openssh-server-8.7p1-10.el9 or later is required (RHBA-2022:6598 - Bug Fix Advisory ).
7. Only the Ubuntu Server edition is supported.
8. Only the default, non-rolling generic kernel image for the Ubuntu Server edition is supported. Ubuntu Hardware Enablement (Ubuntu HWE) kernels and others are not supported with IBM Storage Scale.

Table 29. IBM Spectrum Scale 5.1.8: Tested software versions and latest tested kernels for Linux²

Architecture	RHEL1 7.94	RHEL1 8.4 8.6 8.7 8.8	RHEL1 9.05, 6 9.15, 6 9.27	Ubuntu 20.04 20.04.3 20.04.4 20.04.5 20.04.6	Ubuntu 22.04 22.04.1 22.04.2 22.04.3	SLES 15 SP4
x86_64	RHEL 7.9: 3.10.0-1160.102.1.el7 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	RHEL 8.4: 4.18.0- 305.86.2.el8_4 RHEL 8.6: 4.18.0-372.70.1.el8_6 RHEL 8.7: 4.18.0- 425.19.2.el8_7 RHEL 8.8: 4.18.0-477.27.1.el8_8 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21) Object: 5.1.1	RHEL 9.0: 5.14.0-70.70.1.el9_0 RHEL 9.1: 5.14.0- 162.6.1.el9_1 RHEL 9.2: 5.14.0-284.30.1.el9_2 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.3: 5.4.0-81-generic Ubuntu 20.04.4: 5.4.0.131-generic Ubuntu 20.04.5: 5.4.0-139-generic Ubuntu 20.04.6: 5.4.0-166-generic SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	Ubuntu 22.04: 5.15.0-27-generic Ubuntu 22.04.1: 5.15.0.66-generic Ubuntu 22.04.2: 5.15.0-78-generic Ubuntu 22.04.3: 5.15.0-88-generic SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	SLES 15 SP4: 5.14.21-150400.24.92.1 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)
Power LE	RHEL 7.9: 3.10.0-1160.99.1.el7 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	RHEL 8.4: 4.18.0- 305.86.2.el8_4 RHEL 8.6: 4.18.0- 372.64.1.el8_6 RHEL 8.7: 4.18.0- 425.13.1.el8_7 RHEL 8.8: 4.18.0-477.27.1.el8_8 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21) Object: 5.1.1	RHEL 9.0: 5.14.0- 70.36.1.el9_0 RHEL 9.1: 5.14.0- 162.6.1.el9_1 RHEL 9.2: 5.14.0-284.11.1.el9_2 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.3: 5.4.0-81-generic Ubuntu 20.04.4: 5.4.0.131-generic Ubuntu 20.04.5: 5.4.0-146-generic Ubuntu 20.04.6: 5.4.0-163-generic SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)		SLES 15 SP4: 5.14.21-150400.24.28.1
Linux on Z3	RHEL 7.9: 3.10.0-1160.102.1.el7 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	RHEL 8.4: 4.18.0-305 RHEL 8.6: 4.18.0-372 RHEL 8.7: 4.18.0-425.19.2.el8_7 RHEL 8.8: 4.18.0-477.21.1.el8_8 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	RHEL 9.0: 5.14.0-284.18.1.el9_2 RHEL 9.1: 5.14.0-162 RHEL 9.2: 5.14.0-284.30.1.el9_2 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)	No plan to support	No plan to support	SLES 15 SP4: 5.14.21-150400.24.92.1 SMB: 4.17.5 1-3 NFS: 3.5 (ibm 071.21)

Table 30. IBM Spectrum Scale 5.1.8: Tested software versions and latest tested kernels for Windows and AIX

AIX 7.2	AIX 7.3	Windows 10 (>= version 1809, OS Build 17763)	Windows 11 (>= OS Build 22000)	Windows Server 2019 (>= version 1809, OS Build 17763)	Windows Server 2022 (>= OS Build 20348)
TL 4	TL 0 7300-00-00-0000
TL 5	TL 1

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Support for RHEL 7 (POWER9) stopped from version 7.6. If you need to upgrade, see What is IBM POWER9 Systems compatibility mode?.
5. Leapp upgrade from RHEL 8 to 9 with IBM Storage Scale installed is not supported.
6. For RHEL 9, openssh-server-8.7p1-10.el9 or later is required (RHBA-2022:6598 - Bug Fix Advisory ).
7. Only the Ubuntu Server edition is supported.
8. Only the default, non-rolling generic kernel image for the Ubuntu Server edition is supported. Ubuntu Hardware Enablement (Ubuntu HWE) kernels and others are not supported with IBM Storage Scale.

Table 31. IBM Storage Scale 5.1.2.15: Tested software versions and latest tested kernels for Linux²

Architecture	RHEL1 7.94	RHEL1 8.6 8.8 8.9	Ubuntu 20.04 20.04.3 20.04.4 20.04.5 20.04.6	Ubuntu 22.04 22.04.1 22.04.2 22.04.3	SLES 15 SP5
x86_64	RHEL 7.9: 3.10.0-1160.118.1.el7 SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)	RHEL 8.6: 4.18.0-372.98.1.el8_6 RHEL 8.8: 4.18.0-477.13.1.el8_8 RHEL 8.9: 4.18.0-513.5.1 SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28) Object: 5.1.1	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.3: 5.4.0-81-generic Ubuntu 20.04.4: 5.4.0.130.130 Ubuntu 20.04.5: 5.4.0-148-generic Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)	Ubuntu 22.04: 5.15.0-27-generic Ubuntu 22.04.1: 5.4.0.138.136 Ubuntu 22.04.2: 5.15.0-67-generic Ubuntu 22.04.3: 5.15.0-78-generic	SLES 15 SP5: 5.14.21-150500.55.44.1 SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)
Power LE	RHEL 7.9: 3.10.0-1160.118.1.el7 SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)	RHEL 8.6: 4.18.0- 372.52.1.el8_6 RHEL 8.8: 4.18.0-477.13.1.el8_8 RHEL 8.9: 4.18.0-513.5.1 SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28) Object: 5.1.1	Ubuntu 20.04: 5.4.0-29-generic Ubuntu 20.04.3: 5.4.0-81-generic Ubuntu 20.04.4: 5.4.0.130.130 Ubuntu 20.04.5: 5.4.0.136.134 Ubuntu 20.04.6: 5.4.0-174-generic SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)		SLES 15 SP5: 5.14.21-150500.53-default
Linux on Z3	RHEL 7.9: 3.10.0-1160 SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)	RHEL 8.6: 4.18.0-372 RHEL 8.8: 4.18.0-477.13.1.el8_8 RHEL 8.9: 4.18.0-513.5.1 SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)	No plan to support		SLES 15 SP5: 5.14.21-150500.53-default SMB: 4.13.17 7-1 NFS: 3.5 (ibm 070.28)

Table 32. IBM Storage Scale 5.1.2.15: Tested software versions and latest tested kernels for Windows and AIX

AIX 7.2	AIX 7.3	Windows 10	Windows Server 2016	Windows Server 2019
TL 4	TL 0
TL 5	TL 1
	TL 2 7300-02-01-2346

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Support for RHEL 7 (POWER9) stopped from version 7.6. If you need to upgrade, see What is IBM POWER9 Systems compatibility mode?.

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Support for RHEL 7 (POWER9) stopped from version 7.6. If you need to upgrade, see What is IBM POWER9 Systems compatibility mode?.

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Support for RHEL 7 (POWER9) stopped from version 7.6. If you need to upgrade, see What is IBM POWER9 Systems compatibility mode?.

1. Red Hat live kernel patching is not supported on IBM Storage Scale.
2. If protocols and authentication are enabled, python3-ldap needs to be installed for mmadquery to run.
3. With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
4. Support for RHEL 7 (POWER9) stopped from version 7.6. If you need to upgrade, see What is IBM POWER9 Systems compatibility mode?.

Feature support exceptions

The following tables contain only the features that are not supported on AIX, Linux, Power, and Windows for the most recent versions of IBM Storage Scale. To determine which edition of IBM Storage Scale includes specific features, see 13.1 Where can I find detailed information about IBM Storage Scale and ESS licensing and pricing?

Table 39. IBM Storage Scale 5.2.0: Feature exceptions for Linux

Architecture	RHEL 8.6 8.8 8.9	RHEL 9.0 9.2 9.3	Ubuntu 20.04 20.04.5 20.04.6	Ubuntu 22.04 22.04.2 22.04.3	SLES 15 SP5
x86_64	N/A	Authentication NIS method restricted and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE	ECE, Authentication NIS method restricted and object protocol	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	ECE, Authentication NIS method restricted and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol
ARM 64	No plan to support	Protocol servers (SMB, NFS, CNFS, Object), NSD server, ECE, GNR, HSM, signed kernels, and GUI cannot run on ARM nodes.	No plan to support	Protocol servers (SMB, NFS, CNFS, Object), NSD server, ECE, GNR, HSM, signed kernels, and GUI cannot run on ARM nodes.	No plan to support

• With IBM Storage Scale 5.2.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.

Table 40. IBM Storage Scale 5.2.0: Feature exceptions for AIX and Windows

AIX 7.2 7.3

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 41. IBM Storage Scale 5.1.9.3: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.6 8.8	RHEL 9.0 9.1	Ubuntu 20.04 20.04.5 20.04.6	Ubuntu 22.04 22.04.2 22.04.3 22.04.4	SLES 15 SP5
x86_64	Object protocol	N/A	Authentication NIS method restricted and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, Authentication NIS method restricted and object protocol	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	ECE, FPO, HDFS, and object protocol	ECE, Authentication NIS method restricted and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

Table 42. IBM Storage Scale 5.1.9.3: Feature exceptions for AIX and Windows

AIX 7.2 7.3

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 43. IBM Storage Scale 5.1.9.2: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.6 8.8	RHEL 9.0 9.1	Ubuntu 20.04 20.04.5 20.04.6	Ubuntu 22.04 22.04.2 22.04.3	SLES 15 SP5
x86_64	Object protocol	N/A	Authentication NIS method restricted and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, Authentication NIS method restricted and object protocol	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	ECE, FPO, HDFS, and object protocol	ECE, Authentication NIS method restricted and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.

Table 44. IBM Storage Scale 5.1.9.2: Feature exceptions for AIX and Windows

AIX 7.2 7.3

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 45. IBM Storage Scale 5.1.9.1: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.6 8.8	RHEL 9.0 9.1	Ubuntu 20.04 20.04.3 20.04.4 20.04.5	Ubuntu 22.04 22.04.1 22.04.2	SLES 15 SP4
x86_64	Object protocol	N/A	Authentication NIS method restricted and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, Authentication NIS method restricted and object protocol	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	ECE, FPO, HDFS, and object protocol	ECE, Authentication NIS method restricted and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.

Table 46. IBM Storage Scale 5.1.9.1: Feature exceptions for AIX and Windows

AIX 7.2 7.3

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 47. IBM Storage Scale 5.1.8.1: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.6 8.8	RHEL 9.0 9.1	Ubuntu 20.04 20.04.4 20.04.5	Ubuntu 22.04 22.04.1 22.04.2	SLES 15 SP4
x86_64	Object protocol	N/A	Authentication NIS method restricted and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, Authentication NIS method restricted and object protocol	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	ECE, FPO, HDFS, and object protocol	ECE, Authentication NIS method restricted and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.

Table 48. IBM Storage Scale 5.1.8.1: Feature exceptions for AIX and Windows

AIX 7.2 7.3

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 49. IBM Spectrum Scale 5.1.8: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.4 8.6 8.7	RHEL 9.0 9.1	Ubuntu 20.04 20.04.3 20.04.4 20.04.5	Ubuntu 22.04 22.04.1 22.04.2	SLES 15 SP4
x86_64	Object protocol	N/A	Authentication NIS method restricted and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, Authentication NIS method restricted and object protocol	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	ECE, FPO, HDFS, and object protocol	ECE, Authentication NIS method restricted and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Spectrum® Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Spectrum Scale development about the RPQ or SCORE process.

Table 50. IBM Storage Scale 5.1.8: Feature exceptions for AIX and Windows

AIX 7.2 7.3

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 51. IBM Storage Scale 5.1.2.15: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.4 8.6 8.7	Ubuntu 20.04 20.04.3 20.04.4 20.04.5	Ubuntu 22.04 22.04.1 22.04.2	SLES 15 SP5
x86_64	Object protocol	N/A	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	FPO, HDFS, and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
• Performance monitoring ZIMON packages (gpfs.gss.pmsensors and gpfs.gss.pmcollector) are available from IBM Storage Scale 5.1.2.3 and later for SLES15 with ppc64LE.

Table 52. IBM Storage Scale 5.1.2.15: Feature exceptions for AIX and Windows

AIX 7.2

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 53. IBM Storage Scale 5.1.2.14: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.4 8.6 8.7	Ubuntu 20.04 20.04.3 20.04.4 20.04.5	Ubuntu 22.04 22.04.1 22.04.2	SLES 15 SP4
x86_64	Object protocol	N/A	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	FPO, HDFS, and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
• Performance monitoring ZIMON packages (gpfs.gss.pmsensors and gpfs.gss.pmcollector) are available from IBM Storage Scale 5.1.2.3 and later for SLES15 with ppc64LE.

Table 54. IBM Storage Scale 5.1.2.14: Feature exceptions for AIX and Windows

AIX 7.2

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 55. IBM Storage Scale 5.1.2.13: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.4 8.6 8.7	Ubuntu 20.04 20.04.3 20.04.4 20.04.5	Ubuntu 22.04 22.04.1 22.04.2	SLES 15 SP4
x86_64	Object protocol	N/A	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	FPO, HDFS, and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
• Performance monitoring ZIMON packages (gpfs.gss.pmsensors and gpfs.gss.pmcollector) are available from IBM Storage Scale 5.1.2.3 and later for SLES15 with ppc64LE.

Table 56. IBM Storage Scale 5.1.2.13: Feature exceptions for AIX and Windows

AIX 7.2

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

Table 57. IBM Storage Scale 5.1.2.12: Feature exceptions for Linux

Architecture	RHEL 7.9	RHEL 8.4 8.6 8.7	Ubuntu 20.04 20.04.3 20.04.4 20.04.5	Ubuntu 22.04 22.04.1 22.04.2	SLES 15 SP4
x86_64	Object protocol	N/A	ECE, HDFS and object protocol	ECE, HDFS and object protocol	ECE, HDFS and object protocol
Power LE	ECE and object protocol	ECE	ECE, HDFS, installation toolkit, and object protocol	ECE, HDFS, installation toolkit, and object protocol, SMB, NFS	Clustered watch folder, ECE, file audit logging, HDFS, integrated protocols (CES), and installation toolkit
Linux on Z	ECE, FPO, HDFS, and object protocol	FPO, HDFS, and object protocol	No plan to support	No plan to support	ECE, FPO, HDFS, and object protocol

• With IBM Storage Scale 5.1.x, NFS and SMB protocols can be served from RHEL or SLES 15 on Linux on System Z servers. An RPQ would be required for IBM to review any requests for Integrated Protocol Server support. Ask your sales representative to contact IBM Storage Scale development about the RPQ or SCORE process.
• Performance monitoring ZIMON packages (gpfs.gss.pmsensors and gpfs.gss.pmcollector) are available from IBM Storage Scale 5.1.2.3 and later for SLES15 with ppc64LE.

Table 58. IBM Storage Scale 5.1.2.12: Feature exceptions for AIX and Windows

AIX 7.2

Windows 10 Windows Server 2016 Windows Server 2019

AFM AFM-DR Call home Clustered NFS Clustered watch folder ECE File audit logging FPO GUI HDFS IBM Storage Scale Container Native deployment IBM Storage Scale CSI Driver Installation toolkit Integrated protocols (CES) Performance monitoring REST API Transparent cloud tiering

AFM AFM-DR Backup of a file system Call home Clustered NFS Clustered watch folder ECE Encryption of data at rest File audit logging File clones FPO GUI HDFS Health monitoring Installation toolkit Integrated protocols (CES) Performance monitoring Quotas REST API Transparent cloud tiering For more information, see GPFS limitations in Windows in the IBM Storage Scale: Concepts, Planning, and Installation Guide and Q2.8 What are the limitations of IBM Storage Scale support for Windows? in the IBM Storage Scale FAQ.

• Any 5-level paging capable processors (for example, Ice Lake) need to apply a fix or disable 5-level paging in the OS. For more information, see IBM Spectrum Scale: Spectrum Scale requires a fix to run on the latest generation of Intel x86_64 hardware with 5-level page tables.
• For IBM Storage Scale on RHEL 7 or SLES 12 SP1 (kernel versions later than 3.7) to run on the Broadwell processors, the IBM Storage Scale version needs to be at version 4.1.1.10 or later on the 4.1 release and version 4.2.1.1 or later on the 4.2 release. On IBM Storage Scale releases earlier than version 4.1.1.10 on the 4.1 release and earlier than version 4.2.1.1 on the 4.2 release, it is necessary to follow the steps outlined below:
  • Disable the Supervisor Mode Access Prevention (smap) kernel parameter
  • Reboot the node before using GPFS
  • For more information, see http://www-01.ibm.com/support/docview.wss?uid=ssg1S1009287.
• Systemd is replacing traditional sysVinit in many Linux distributions. Though systemd should still support traditional sysVinit without any changes, starting with systemd version 219-19, this support is not working properly, causing IBM Storage Scale services not to startup at boot time. If you are experiencing this problem, you can do one of the following:
  • Upgrade your nodes to IBM Storage Scale V4.2.0.1.

    IBM Storage Scale uses systemd to start IBM Storage Scale services starting with V4.2.0.1.

  • Apply the following workaround:

    rm /etc/init.d/gpfs
    cp /usr/lpp/mmfs/bin/gpfsrunlevel /etc/init.d/gpfs

  • If systemd is upgraded to version 219 after IBM Storage Scale V4.2.0.1 was already installed, you can apply the workaround in the second option or take the following step to enable IBM Storage Scale services to use systemd:

    systemctl enable /usr/lpp/mmfs/lib/systemd/gpfs.service

• GPFS V3.4 and V3.5 on Linux do not support standard disk partitioning commands, and do not label disks in a way that is recognized by standard disk utilities. To these utilities, GPFS disks will generally appear to be unused devices. The mmlsnsd command allows systems administrators to list GPFS disks. Administrators should verify the disposition of a disk before using parted, fdisk, or another partitioning command so as not to inadvertently partition a GPFS disk.
  Note: IBM Storage Scale V4.1 writes a GUID Partition Table (GPT) label on newly created NSDs, which should make it safer to use standard disk partitioning tools on servers with block access to GPFS NSDs
• As of V3.5.0.3, GPFS provides mmksh and the KSH related issues below do not apply:
  • GPFS has experienced memory leak issues with various levels of KSH. In order to address this issue, please ensure that you are at the minimum required level of KSH or later:
    • RHEL 5 should be at ksh-20100202-1.el5_6.3, or later
    • SLES 10 should be at ksh-93t-13.17.19 (shipped in SLES 10 SP4), or later
    • SLES 11 should be at ksh-93t-9.9.8 (shipped in SLES11 SP1)
  Some GPFS commands may experience a premature termination bug with various levels of KSH. In order to address this issue, please ensure that you are at the required level of KSH:

  • RHEL 6.1 and RHEL 6.2 should be at ksh-20100621-12.el6_2.1 or later
  • SLES 11 SP2 should be at ksh-93u-0.8.1 or later
• GPFS has the following restrictions on RHEL support:
  • For RHEL, ensure either of the following for IBM Storage Scale to work properly in a Secure Boot enabled system:
    • Disable Secure Boot in BIOS
    • Sign IBM Storage Scale kernel module manually.
  • GPFS does not currently support the following kernels:
    • RHEL hugemem
    • RHEL largesmp
    • RHEL uniprocessor (UP)
  • There is required service for support of RHEL, please see the question What are the current advisories for GPFS on Linux?
• GPFS has the following restrictions on SLES support:
  • There is required service for support of SLES, please see the question What are the current advisories for GPFS on Linux?
• GPFS for Linux on Power does not support mounting of a file system with a 16KB block size when running on either RHEL 5, or later, or SLES 11, or later.
• GPFS has the following restrictions on Debian support:
  • Clustered NFS is not supported on Debian.
  • The File Placement Optimizer function is not supported on Debian.
  • These nodes can only operate as NSD clients and do not support direct attached disks.

Two NFS services cannot run at the same time. You will need to stop and mask the Linux kernel nfs-server that is shipped with the distribution in order to use the NFS-Ganesha server that is shipped with IBM Storage Scale.

For NFS:

For Swift Object:

For example:

c13c1apv7:~ # awk '$3 == "gpfs" { print }' /proc/mounts
/gpfs/automountdir/fs2 /gpfs/automountdir/fs2 gpfs rw,relatime 0 0
fs1 /gpfs/fs1 gpfs rw,relatime 0 0
fs5mpathd /fs5mpathd/a/few/level/mount/point gpfs rw,relatime 0 0
remote /remote gpfs rw,relatime 0 0
/gpfs/automountdir/fs3mpathb /gpfs/automountdir/fs3mpathb gpfs rw,relatime 0 0
/fs4mpathc /gpfs/automountdir/fs4mpathc gpfs rw,relatime 0 0
/gpfs/automountdir/autofs1 /gpfs/automountdir/autofs1 gpfs rw,relatime 0 0
/autofs2 /gpfs/automountdir/autofs2 gpfs rw,relatime 0 0
/autofs3 /gpfs/automountdir/autofs3 gpfs rw,relatime 0 0

c13c1apv7:~ # mount | awk '/type gpfs/ { print }'
/gpfs/automountdir/fs2 on /gpfs/automountdir/fs2 type gpfs (rw,relatime)
fs1 on /gpfs/fs1 type gpfs (rw,relatime)
fs5mpathd on /fs5mpathd/a/few/level/mount/point type gpfs (rw,relatime)
remote on /remote type gpfs (rw,relatime)
/gpfs/automountdir/fs3mpathb on /gpfs/automountdir/fs3mpathb type gpfs (rw,relatime)
/fs4mpathc on /gpfs/automountdir/fs4mpathc type gpfs (rw,relatime)
/gpfs/automountdir/autofs1 on /gpfs/automountdir/autofs1 type gpfs (rw,relatime)
/autofs2 on /gpfs/automountdir/autofs2 type gpfs (rw,relatime)
/autofs3 on /gpfs/automountdir/autofs3 type gpfs (rw,relatime)

• GPFS for Windows supports most of the GPFS features that are available on AIX and Linux. Exceptions include certain GPFS commands to apply policies, administer quotas and administer ACLs, among others. These commands are thus unsupported in a Windows-only cluster. In a mixed (heterogeneous) cluster, these Windows-lacking commands can still be executed on Unix nodes without participation from the Windows nodes in that cluster.

  For more information, see the GPFS limitations on Windows topic in the IBM Storage Scale: Concepts, Planning, and Installation Guide.

  For more information about GPFS features that are not supported on Windows nodes, see 2.1 What is supported on IBM Storage Scale for AIX, Linux, Power, and Windows?.

• Encryption is not supported on Windows. The encryption function in the Advanced Edition should be disabled if Windows nodes are present in the cluster.
• IPv4 subnets are not supported in a cluster that is defined with IPv6 primary addresses (hostname) that contains Windows nodes.

• For TSM V7.1.1, which is only supported with IBM Storage Scale V4.1, see:
  • IBM Tivoli® Storage Manager V7.1.1 Knowledge Center at http://www-01.ibm.com/support/knowledgecenter/SSGSG7_7.1.1/com.ibm.itsm.tsm.doc/welcome.html.
  • TSM support page at https://www-947.ibm.com/support/entry/myportal/product/tivoli/tivoli_storage_manager?productContext=-2105539168.

OpenSSH 9.0 includes a change that is incompatible with IBM Storage Scale. Ensure that OpenSSH 9.0 is not used with IBM Storage Scale. Earlier OpenSSH packages from Cygwin work. It is expected that this issue will be resolved with OpenSSH 9.1.

These coexistence rules also apply for remote cluster access (multi-cluster remote mount). A node running release N-2 cannot perform a remote mount from a cluster which has nodes running release N, and vice versa.

• Exporting using NFS V4 is supported starting with IBM Storage Scale V4.1 or later.
• CNFS over IPV6 is only supported with IBM Storage Scale V4.1 or later.
• It is very important to make all the nodes in the same group as identical as possible - from the hardware and software running on them to the configuration of IBM Storage Scale, NFS, and the network.
• CNFS is not supported on the Ubuntu distribution.
• CNFS is not supported on SLES 15 and later versions.
• CNFS is not able to export a remotely mounted filesystem.

• AIX V6.1 or AIX V7.1.
• The following Linux distributions:
  • RHEL 5.5 and later, 6.x, and 7x.
  • SLES 11 SP1 and later, and SLES 12

• Support for Persistent Reserve requires:
  • For V3.5 support on AIX V6.1 requires APAR IZ57224

    AIX 6.1 TL7 + Service Pack 4 is required to support Persistent Reserve without SDDPCM.

  • For V3.5 , V4.1 or V4.2 support on AIX V7.1, refer to the storage documentation to install the correct multipath driver.
• The use of Persistent Reserve is supported on GPFS tie-breaker disks with GPFS V3.5.0.21, or later, and IBM Storage Scale V4.1.0.4, or later.
  Note: See the question What are the current requirements/limitations for using the Cluster Configuration Repository (CCR) ?
• For the Activate Persist Through Power Loss (APTPL) feature:
  • On Linux, if the storage is capable of supporting APTPL, GPFS V3.5.0.15, or later supports this feature.
• Starting with 3.5.0.16, it is possible to have a descOnly disk that resides on a device that does not support SCSI-3 Persistent Reserve while allowing Persistent Reserve to be used on other disks in the same file system. The lack of Persistent Reserve support for the descOnly disk will not result in fast failover being disabled.

Also see the question What devices does GPFS support with SCSI-3 Persistent Reservations?

• The installation and use of either IBM Security Key Lifecycle Manager (ISKLM) V2.6 or later, or Vormetric Data Security Manager (DSM) V6.2 or later, is required for each node that acts as a key server. Key server nodes are not required to be members of the IBM Storage Scale cluster(s) that use them.
  For ISKLM:

  • IBM Security Guardium Key Lifecycle Manager (GKLM) V4.2.1 is supported with the IBM Storage Scale Encryption feature.
  • IBM Security Guardium Key Lifecycle Manager (GKLM) V4.1.1 is supported with the IBM Storage Scale Encryption feature.
  • IBM Security Guardium Key Lifecycle Manager (GKLM) V4.1.0.1 (IF01) is supported with the IBM Storage Scale Encryption feature.
  • ISKLM is not shipped with nor licensed with IBM Storage Scale and must be purchased separately.
  • ISKLM V2.6, or later of the server software (D0887LL) must be installed on each node that acts as a key server.
  • See the IBM Security Key Lifecycle Manager documentation for details about licensing that offering.

  For Vormetric:

  • Vormetric Data Security Manager is not shipped with nor licensed with IBM Storage Scale and must be purchased separately. Contact Vormetric directly to purchase.
  • Vormetric Data Security Manager is not supported on nodes installed with Linux on Z.
• Every node that accesses the encrypted data must be running the Advanced Edition or Data Management Edition of IBM Storage Scale.
• Every node that accesses the encrypted data, and also nodes which play a management role in the file system (such as manager node, an NSD server, or a node which participates in the restripe of a file system), must have network connectivity to the key server.
• IBM Storage Scale client nodes do not require a key server license.
• Vormetric DSM V6.0.2, V6.0.3, and V6.1.x releases are not supported with IBM Storage Scale encryption. The user interface in these releases does not support the creation of KMIP objects such as the Master Encryption Keys (MEKs) that are used by IBM Storage Scale encryption. For more information, see https://www-01.ibm.com/support/docview.wss?uid=ibm10734479.
• Vormetric DSM V6.2 user interface supports the creation of KMIP objects such as the Master Encryption Keys (MEKs) used by IBM Storage Scale encryption. IBM Storage Scale encryption is supported with Vormetric DSM V6.2.

• The SNMP collector node must be a Linux node in your GPFS cluster. GPFS utilizes Net-SNMP which GPFS does not support on AIX.
• Support for ppc64 requires the use of Net-SNMP 5.4.1. Binaries for Net-SNMP 5.4.1 on ppc64 are not available. You will need to download the source and build the binary. Go to http://net-snmp.sourceforge.net/download.html
• If the monitored cluster is relatively large, you need to increase the communication time-out between the SNMP master agent and the GPFS SNMP subagent. In this context, a cluster is considered to be large if the number of nodes is greater than 25, or the number of file systems is greater than 15, or the total number of disks in all file systems is greater than 50. For more information see Configuring Net-SNMP in the IBM Storage Scale: Problem Determination Guide.
• SNMP-based monitoring has not been tested in clusters composed of more than 127 nodes.

• Beginning with IBM Storage Scale V4.2, in file systems that are managed by an HSM system, mmbackup will skip over candidates for backup that are migrated offline to avoid causing a recall storm. Instead, records for these files will be added to a file in the root of the fileset called mmbackup.hsmMigFiles.name of server. System managers should recall these changed files online to allow mmbackup to properly protect them in the next invocation.
• File systems with IBM Storage Protect for Space Management that have unlinked filesets, will be required to link all filesets when issuing the mmbackup command for the first time after you upgrade GPFS cluster from GPFS 3.5.0.10 or lower, to GPFS 3.5.0.11 or higher. If you have any concerns regarding this requirement, please contact GPFS service.
  • In the United States contact us toll free at 1-800-IBM-SERV (1-800-426-7378)
  • In other countries, contact your local IBM Service Center
• Use of the IBM Storage Protect Backup-Archive client option SKIPACLUPDATECHECK with the mmbackup command requires IBM Tivoli Storage Manager release 6.4.1.0 or later.
  Note: Beginning with Version 7.1.3, IBM Tivoli Storage Manager is now IBM Storage Protect.
• The GPFS mmbackup command is not integrated with the IBM Storage Protect for Space Management-Multi HSM Server feature. See Managing a file system with multiple Tivoli Storage Manager servers.
• Restoring a file via a node that has a different architecture than the one used to do the backup could cause the associated ACL to be corrupted.

  For example, if a file was backed up using an x86_64 node, and then restored using a ppc64 node, this could cause its ACL to be corrupted (caused by differences in endianness of the architectures which is not supported by the GPFS APIs used in the restore operation). It is recommended that backup and restore operations be done on similar types of nodes.

• The mmbackup command supports backup of a whole file system from a global snapshot.

  The mmbackup -S snapshot command option is supported with IBM Storage Scale V4.1.1 on either a global snapshot for the whole file system or for a fileset backup if the fileset was captured in that snapshot. It is also supported with a fileset snapshot for a fileset backup, providing the name of the snapshot is unique among all snapshot names. Do not use the same snapshot name for multiple snapshots.

  The mmbackup -S snapshot command option is supported with GPFS V3.5.0.3 or later. GPFS V3.4 and GPFS V3.5.0.2 or lower do not support backup from a snapshot. If the snapshot directory for global snapshots and the directory for fileset level snapshots are different, then GPFS V3.5.0.4 or higher level is required.

  • Doing backup from a snapshot in an IBM Storage Protect for Space Management managed file system could cause recall of migrated files.

    In an HSM managed file system such as IBM Storage Protect for Space Management, using mmbackup to back up from a snapshot could cause the recall of migrated files if the migration was done after the snapshot was taken. This is due to the fact that a snapshot is a static view of the file system which does not reflect migration state changes. To avoid recalling data from migrated files, create the snapshot and complete the backup operation before migrating files or make sure that migration is done before the snapshot is taken for a backup operation. Backup operations will not recall files if the snapshot captured the files in their migrated state. Until and unless the migrated file stubs are removed from the live file system. In this case a recall will be required to populate the contents of the snapshot view of the files. If a snapshot exists, consider recalling files by using the IBM Storage Protect for Space Management "tape optimized recall" function before deleting migrated files from the active file system.

  • Doing backup from a snapshot in an IBM Storage Protect for Space Management managed file system could cause failure to backup migrated files.
• The use of unsupported characters in the names of files or directories will cause failures.

  mmbackup uses the IBM Storage Protect Backup Archive client to backup data to the IBM Storage Protect server. As IBM Storage Protect currently does not support all special characters in file or directory names, they cannot be supported by mmbackup. If special characters are used in the names of files or directories backed up by the mmbackup command, failures will result. Known special characters which can cause problems include: *, ?, ", ', control-X, control-Y, carriage return and the new line character. Use of the IBM Storage Protect options QUOTESARELITERAL and WILDCARDSARELITERAL along with the --noquote command line option to mmbackup will allow support for all special characters except carriage return, new line, control-X, and control-Y.

• Beginning with IBM Storage Scale V4.1.1, backup of either the entire file system or a selected fileset is supported. Nested fileset arrangements where one fileset is linked inside another are not supported by mmbackup on a fileset. Nesting remains supported for whole file system mmbackup. The first mmbackup of any fileset must be made using the option -t full to avoid causing accidental invalidation of existing backups that may exist of previously existing nested filesets.
• Differences in the way the mmbackup command and IBM Storage Protect process the include and exclude statements in the dsm.sys configuration file may cause files or directories to be included or excluded unexpectedly.
  Known differences in processing include, but are not limited to:

  • The mmbackup command does not support exclude.archive, exclude.file.spacemgmt, exclude.spacemgmt, exclude.fs.
  • Whether or not there is a / at the end of an exclude.dir affects the way mmbackup decides what files or directories are excluded.
  • exclude.file may cause incorrect files to be backed up if the pattern presents a wildcard at the end.