IT33652: INCORRECT SNAPSHOT CAN BE MOUNTED DURING INSTANT OR FILE RESTOREIF VIRTUAL MACHINES HAVE DUPLICATE DISK UUID IN HYPER-V SERVER

APAR status

• Closed as program error.

Error description

• In Hyper-V server, two virtual machines may have duplicate disk
  UUIDs if one is cloned from another. The command "get-disk|fl"
  returns identical UniqueId field values. The backups of both
  virtual machines are successful, however, both instant restore
  and file restore may fail. For example, two virtual machines
  are vm-1 and vm-2. Instant restore of vm-1 mounts the snapshot
  of vm-2 and returns mount error:
  
  INFO,1591148184313,<date time timezone>,2,CTGGA1312,Mounting
  VM vm-2 disks
  DETAIL,1591148186427,<date time timezone>,2,CTGGA1314,Released
  lock for VM (vm-2).
  DETAIL,1591148186486,<date time timezone>,2,CTGGA2185,Mount VM
  disks: Failed (1 objects)
  ERROR,1591148186489,<date time timezone>,2,CTGGA2177,Unexpected
  error during recovery step (Mount VM disks). Contact support
  for further assistance.
  
  File restore display following error:
  
  DETAIL,1591151224282,<date time timezone>,2,CTGGA3139,
  [vm-1-ip] Start File Restore
  ERROR,1591151248092,<date time timezone>,2,CTGGA3085,
  [vm-1-ip] Failed to restore file
  \\?\c:\ProgramData\SPP\mnt\SPPR_d30f539ba45311eaa2ba00155d001906
  _1591102893382_1591151026397\1.txt. Error: Failed to restore
  files  error [The restore source file
  [\\?\c:\ProgramData\SPP\mnt\SPPR_d30f539ba45311eaa2ba00155d00190
  6_1591102893382_1591151026397\1.txt] does not exist].
  DETAIL,1591151248099,<date time timezone>,,2,CTGGA3140,
  [vm-1-ip] File Restore end
  
  Above error only happens if the file exists on one of the
  duplicate UUID disks but not the other. So in some circumstances
  the file restore may complete with the wrong virtual machine's
  disk used in the case where the file is present on both disks.
  
  Versions Affected: 10.1.*
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect Plus level 10.1.6                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed IBM Spectrum Protect Plus level 10.1.6 *
  * ifix2 and 10.1.7. Note that this is subject to change at the *
  * discretion of IBM.                                           *
  ****************************************************************
  

Problem conclusion

• A change was made to not use the disk UUID as the globally
  unique identifier when locating the disk for Hyper-V restore
  operations.
  

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

  SP PLUS

• Fixed component ID

  5737SPLUS

Applicable component levels