A fix is available
APAR status
Closed as new function.
Error description
This support allows 1-END HyperPAV minidisks. Previously, guests HyperPAV usage was limited to dedicated or fullpack minidisks. This will protect cylinder zero from guest writes.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: Users exploiting the z/VM HyperPAV support * **************************************************************** * PROBLEM DESCRIPTION: * **************************************************************** * RECOMMENDATION: APPLY PTF * **************************************************************** z/VM's HyperPAV support is extended to also allow for a 1-END minidisk on a real HyperPAV base device to be used as a virtual HyperPAV base device. Lifting the former restriction on using a dedicated device or a fullpack (0-END) minidisk.
Problem conclusion
Temporary fix
Comments
To make use of the z/VM HyperPAV support the following MDISK statements (or DEFINE MDISK equivalent) can be used: MDISK vdev 3390 0 END volid mode MDISK vdev 3390 1 END volid mode ---- Where the latter requires the new support. Note: volid must still refer to a real HyperPAV base volume. Any so defined virtual HyperPAV base device qualifies for being used on a subsequent: DEFINE HYPERPAVALIAS vdev FOR BASE vdev ---- All related CP command output (DEFINE, QUERY VIRTUAL PAV) considers these defined devices without external change. _______________________________________________________________ Additional Information can be found at the 720 level in the: CP PLANNING AND ADMINISTRATION book (SC24-6271-06) - Using IBM HyperParallel Access Volumes section (https://www.vm.ibm.com/library/index.html) _______________________________________________________________ Related changes: - z/VM 7.2 CP Commands and Utilities Reference (SC24-6268-07) "DEFINE HYPERPAV command" - HYPERPAV HELPDEFI (Usage Note 3) 3. The base vdev specified on the command must be a virtual HyperPAV base device that is defined as a full-pack (0-END) minidisk or a 1-END minidisk.
APAR Information
APAR number
VM66421
Reported component name
VM CP
Reported component ID
568411202
Reported release
720
Status
CLOSED UR1
PE
NoPE
HIPER
NoHIPER
Special Attention
YesSpecatt / New Function / Xsystem
Submitted date
2020-07-27
Closed date
2020-12-03
Last modified date
2021-03-30
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM35784
Modules/Macros
HCPDUP HCPFTR HCPFULPK HCPFXR HCPHPV HCPIIO HCPMDF HCPMDP HCPMD1 HCPMD2 HCPMD3 HCPMD4 HCPMD5 HCPSDU HCPSDV HCPVDB HCPVDS HYPERPAV
SC24626807 | SC24627106 |
Fix information
Fixed component name
VM CP
Fixed component ID
568411202
Applicable component levels
R720 PSY UM35784
UP20/12/08 P 2101
Fix is available
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Document Information
Modified date:
31 March 2021