IBM Support

IT15086: LIBRARY CHANGER DEVICE OPEN DELAY MAY SLOW DOWN TAPE MOUNTS FOR LIBRARIES OF TYPE SCSI AND VTL

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Slow performance is observed for an operation involving the
    mount of tape volumes in a library of type SCSI and VTL.
    
    The actlog and QUERY MOUNT commands show that it takes
    unexpectedly long, up to several minutes, for tape volumes to
    be mounted for the operation.
    
    There may be various other reasons for volume mount delays also
    affecting the operations performance. To verify whether this
    APAR (also) applies a server trace with flags PVR MMS is
    needed. It will show multiple repeats of the following
    sequence:
    
    14:45:19.964 [15477][pvr.c][11634][PvrOpenAutoDevice]:
    Library SCSILIB1 opened with handle 16 success
    
    14:45:19.964 [15477][mmsscsi.c][12945][OpenAutoDevice]:Open
    failed for changerdevicefile1 with open handle 16 and
    return code 0.
    
       [ ... 5 second delay ... ]
    
    14:45:24.964 [15477][mmsscsi.c][12990][OpenAutoDevice]:Open
    changerdevicefile1 successful with handle 16.
    
    As seen above, the library object is successfully opened
    followed by an open failure for its associated device file.
    Then there is a 5 second delay until the associated device file
    is successfully opened.
    
    
    IBM Spectrum Protect server versions affected:
    7.1.5 on all supported platforms
    
    Initial Impact: Medium
    
    Additional Keywords:
    tsm server performance tape mount spectrum protect
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Tivoli Storage Manager server users of tape libraries.   *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See error description.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in level 7.1.6.                        *
    * Note that this is subject to change at the discretion of     *
    * IBM.                                                         *
    ****************************************************************
    

Problem conclusion

  • This problem was fixed.
    Affected platforms:  AIX, HP-UX, Solaris, Linux, and Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT15086

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    71L

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-05-04

  • Closed date

    2016-05-05

  • Last modified date

    2016-05-05

  • 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

  • R71A PSY

       UP

  • R71H PSY

       UP

  • R71L PSY

       UP

  • R71S PSY

       UP

  • R71W PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 7.1.3

Reference #: IT15086

Modified date: 05 May 2016