IT28858: THE ESTIMATED CAPACITY OF A SEQUENTIAL ACCESS STORAGE POOL MAY BE INCORRECT FOR EXTERNAL TAPE LIBRARIES.

8.1.9.000-IBM-SPSRV-WindowsX64
8.1.9.000-IBM-SPSRV-Linuxx86_64
8.1.9.000-IBM-SPOC-WindowsX64
8.1.9.000-IBM-SPCMS-WindowsX64
8.1.9.000-IBM-SPSRV-Linuxs390x
8.1.9.000-IBM-SPCMS-WindowsI32
8.1.9.000-IBM-SPOC-Linuxx86_64
8.1.9.000-IBM-SPCMS-Linuxx86_64
8.1.9.000-IBM-SPSRV-Linuxppc64le
8.1.9.000-IBM-SPOC-Linuxs390x
8.1.9.000-IBM-SPOC-LinuxPPC64le
8.1.9.000-IBM-SPSRV-AIX
8.1.9.000-IBM-SPOC-AIX
IBM Spectrum Protect Server V8.1 Fix Pack 8 (V8.1.9) Downloads

APAR status

• Closed as program error.

Error description

• Problem description:
  
  It is possible that the estimated capacity of a sequential
  access storage pool (tape) will be reported incorrectly value
  This skewing can occur if there is a library type where IBM
  Spectrum Protect do not get a scratch volume count in the
  library (such an an external library manager).
  This is seen when estimated capacity is equal to the estimated
  capacity of the used volume and this lead to situation that
  estimated capacity of a sequential access storage pool is
  smaller then expected.
  
  
  ie:
  query stgpool STGPOOL1 f=d
  
                                Storage Pool Name: STGPOOL1
                                Storage Pool Type: Primary
                                Device Class Name: DEV1
                                     Storage Type: DEVCLASS
                               Estimated Capacity: 14,761 G
                               Space Trigger Util:
                                                          Pct
  Util: 6.3
                                                        Pct Migr:
  0.1
  Maximum Scratch Volumes Allowed: 1,000
     Number of Scratch Volumes Used: 1
  
  
  
  query vol stg=STGPOOL1
  
  Volume Name   Storage            Device             Estimated
  Pct    Volume
                                  Pool Name     Class Name
  Capacity     Util     Status
  -------------              -----------                ----------
  ---------          -----     --------
  K01234                STGPOOL1         DEV1             14.4 T
  6.3    Filling
  
  
  Customer/L2 Diagnostics:
  
  The server trace with traceflags: MONITOR MMSLIB SSPOOL will
  show:
  
  17:12:46.766
  [1313879][asutil.c][1807][AsGetPoolStatus]:libName=OTLN,
  availScratch=2147483647,
  isLibClient=0, rc=0.
  
  
  Definition of the availScratch is maximum 31 bit integer. Adding
  the number of used scratch volumes we get a negative number
  causing to only consider the used scratch volumes because
  through this calculation it appears that there are no scratch
  volumes available.
  
  IBM Spectrum Protect versions affected:
  
  Server 8.1.x on supported platforms
  
  Initial Impact:
  
  Low
  
  Additional Keywords:
  
  TSM "Spectrum Protect" "device capacity" "estimated capacity"
  TS001916022
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All IBM Spectrum Protect server users.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See error description.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed in level 8.1.9. Note that this is      *
  * subject to change at the discretion of IBM.                  *
  ****************************************************************
  

Problem conclusion

• This problem was fixed.
  Affected platforms for reported release:  AIX, Linux, and
  Windows.
  Platforms fixed:  AIX, Linux, and Windows.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  TSM SERVER

• Fixed component ID

  5698ISMSV

Applicable component levels