IC88223: DELAYED MOUNTS ON VTL TYPE LIBRARY MAY BE DUE TO UNNECESSARY CHECK FOR WORM MEDIA.

IBM Tivoli Storage Manager (TSM) server V6.3.3.x interim fix downloads

APAR status

• Closed as program error.

Error description

• On a library of type VTL a check for WORM media uses a broad
  lock which can cause mount delays.  The check for WORM media is
  unnecessary as VTL Libraries are assumed to not be multi-media
  capable.
  
  Customer/L2 Diagnostics (if applicable)
  From a PVR MMS it takes over 30 seconds for Tivoli Storage
  Manager to see if the drive was mounted.
     21:16:57.525
  [20778][mmsscsi.c][5195][ScsiWaitUntilReady]:Waiting for drive
  V078 (/dev/rmt41) to become ready in library VTL01.
     ...
     21:17:30.693 [20778][pvrntp.c][4931][NtpTestReady]:Testing
  readiness of drive V078 (/dev/rmt41).
     ...
     21:17:30.878
  [20778][pvrntp.c][6234][NtpObtainMediaType]:Obtained a media
  type of 56 and WORM info of 101.
  
  *NOTE*
  1) Under Define Library Libtype=VTL it states:
      If you are defining a VTL library, your environment must not
  include any mixed-media...
  2)  With physical tape a 30 second or less delay is not critical
  due to the time required to mount the media. In a VTL it can
  become an increasing problem as the number of drives increases
  
  Platforms affected:
  Server 6.3 Unix Linux Windows
  
  
  Initial Impact: Medium
  
  Additional Keywords: ZZ63 lib virtual tape
  

Local fix

• Reducing the number of drives on the VTL may reduce the delay
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Tivoli Storage Manager server users of   *
  *                 VTL library type.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: See error description.                  *
  ****************************************************************
  * RECOMMENDATION: Apply fixing level when available. This      *
  *                 problem is currently projected to be fixed   *
  *                 in levels 6.3.3.1 and 6.3.4. 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 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

• R63A PSY

     UP

• R63H PSY

     UP

• R63L PSY

     UP

• R63S PSY

     UP

• R63W PSY

     UP