IT16633: SNAPDIFF BACKUP CAN FAIL WITH ANS2831E WHEN MULTIPLE SHARES ARE BACKED UP

IBM Spectrum Protectâ„¢ Client 8.1.0 Downloads and READMEs

APAR status

• Closed as fixed if next.

Error description

• When backing up Netapp shares using snapdiff, the snapdiff
  backup can fail when multiple shares are included in the domain.
  The problem was first seen when taking a snapdiff backup of 13
  shares, while the backup was working fine when taking a
  snapdiff backup of 12 shares.
  
  Customer/L2 Diagnostics:
  The dsmerror.log will show:
  
  ANS2831E Incremental by snapshot difference cannot be performed
  on '\\filer.domain.com\share' as it is of type 'Unknown' and is
  not a NetApp/N-Series 'CIFS' volume
  
  When looking in the trace, it is seen that Windows WNet API
  returns only one share when we have too many shares.
  
  ..\..\common\winnt\psfsinfo.cpp(2488): WNetEnum()- total number
  of entries  = 1
  
  This failure is related to the length of the domain names used.
  When these are long names, Windows WNet API can fail because
  of insufficient buffer size.
  
  Tivoli Storage Manager Versions Affected:
  Tivoli Storage Manager Client 7.1.4.1 on Windows
  Tivoli Storage Manager Client 7.1.6.x on Windows
  
  | MDVREGR 5698ISMCL 7.1.4.1 |
  | MDVREGR 5698ISMCL 7.1.6.x |
  
  Initial Impact: Low
  
  Additional Keywords:  Netapp, TSM, Spectrum, Protect, nSeries,
  cDOT, 7-mode
  

Local fix

• Option 1: Lower the number is shares.
  Option 2: Use IP addresses and not the FQDN of the share.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Backup-archive client versions 7.1.4.1 - 7.1.4.4 and 7.1.6   *
  * running on all Microsoft Windows platforms.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

Temporary fix

Comments

• If there is a next release of Tivoli Storage Manager after 7.1,
  this APAR will be fixed in that next release.
  

APAR Information

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

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

Fix information

Applicable component levels

• R71W PSN

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