IT00643: DATA MOVEMENTS OR DATA COPIES OF A DEDUPLICATED STGPOOL VOLUME MIGHT RESULT IN INVALIDATED DEDUPLICATION LINKS - ANR4895E

APAR status

• Closed as program error.

Error description

• A data movement, or data copy, process might end in failure when
  processing a volume located in a deduplicated storage pool.
  The following error would be reported within the failing
  process:
  
  ANR4895E Deduplicated bitfile 123456789 on volume /volume01.dsm
  has invalid links.
  
  The cause of the ANR4895E message and invalid termination of the
  process, are the existence of duplicate aggregates being stored
  in the same storage pool. These files contained within those
  aggregates have conflicting references in the deduplication
  catalog of the Tivoli Storage Manager server.
  
  This is not a deduplication referential integrity problem but
  rather an error in the server for which the server is not
  properly choosing the right deduplication information for each
  aggregate.
  
  
  Customer/L2 Diagnostics:
  These invalidated links will not be reported via a the
  VALIDATE EXTENTS utility.
  
  To check if this APAR does match, the following can be done
  for the reported bitfile from the ANR4895E error:
  
  ANR4895E Deduplicated bitfile 123456789 on volume /volume01.dsm
  has invalid links.
  
  Here is the affected bitfile 123456789.
  From a server command line:
  
  show bfo 123456789
  
  Bitfile Object: 123456789
  **Super-bitfile 123456789 contains following aggregated
  bitfiles,
  Bitfile Id, offset, length, active state or owner, link bfid
    AAAAAAAAAA     0             49004         ZZZZZZZZZZ
    BBBBBBBBBB     0             0             YYYYYYYYYY
  
  **Archival Bitfile Entry
     Bitfile Type: PRIMARY  Storage Format: 22
     Bitfile Size: 49068  Number of Segments: 1, flags: 3
     Storage Pool ID: 5  Volume ID: 987  Volume Name:
  /volume01.dsm
  
  -> This returns here two aggregated bitfiles AAAAAAAAAA and
     BBBBBBBBBB
  
  SHOW BFO against this aggregated bitfiles returned the
  following:
  
  show bfo AAAAAAAAAA
  Bitfile Object: AAAAAAAAAA
  
  **Sub-bitfile AAAAAAAAA is stored in the following aggregate(s)
     Super-bitfile: CCCCCCCCCC, Offset: 0, Length 0, Deduped: F
     Super-bitfile: 123456789, Offset: 0, Length 49004, Deduped: F
  
  -> The bitfile AAAAAAAAAA has two Super-bitfiles
     CCCCCCCCCC is an "empty" chunk
     123456789 is a base chunk
  
  
  show bfo BBBBBBBBBB
  
  Bitfile Object: BBBBBBBBBB
  
  **Sub-bitfile BBBBBBBBBB is stored in the following aggregate(s)
     Super-bitfile: CCCCCCCCCC, Offset: 0, Length 71895, Deduped:
  F
     Super-bitfile: 123456789, Offset: 0, Length 0, Deduped: F
  
  -> The bitfile AAAAAAAAAA has two Super-bitfiles
     CCCCCCCCCC is a base chunk
     123456789 is an "empty" chunk
  
  In this case there are two "deleted" aliases in the same pool.
  Each alias contains a base chunk and an "empty" chunk.
  
  Tivoli Storage Manager Versions Affected:
  Tivoli Storage Manager Server 6.1, 6.2, 6.3 and 7.1 on all
  supported platforms
  
  Initial Impact:
  low
  
  Additional Keywords:
  TSM zz61 zz62 zz63 zz71 invalid link
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Tivoli Storage Manager server users.                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed in levels 6.3.5 and 7.1.1. 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

• R63L PSY

     UP

• R63H PSY

     UP

• R63S PSY

     UP

• R63W PSY

     UP

• R71A PSY

     UP

• R71H PSY

     UP

• R71L PSY

     UP

• R71S PSY

     UP

• R71W PSY

     UP