When attempting to restore a virtual machine from a duplicate backup set stored on a MMS the restore may fail with "Unable to open a disk of the virtual machine."

Problem

After completing a full and incremental backup on a CAS (Central Admin Server) and duplicating the backup sets to a MMS (Managed Media Server), restoring from the duplicate backup set may fail with the errors below.

Error Message

Job Log Error:
Unable to open a disk of the virtual machine.

Debug Log errors:
[fsys\shared]        - VDDK-Log: DISKLIB-DSCPTR: Opened [0]: "VM.vmdk" (0x1a)
[fsys\shared]        - VDDK-Log: DISKLIB-LINK  : Opened '\\PATH_TO_BACKUP_SET\VM.vmdk' (0x1a): monolithicSparse, 125829120 sectors / 60 GB.
[fsys\shared]        - VDDK-Warn: FILE: CreateEntryDirectory creation failure on 'PATH_TO_ORIGINAL_BACKUP_SET\VM.vmdk.lck': The system cannot find the file specified
[fsys\shared]        - VDDK-Warn: FILE: FileIO_Lock on 'PATH_TO_ORIGINAL_BACKUP_SET\VM.vmdk' failed: The system cannot find the file specified
[fsys\shared]        - VDDK-Log: DISKLIB-DSCPTR: DescriptorDetermineType: failed to open 'PATH_TO_ORIGINAL_BACKUP_SET\VM.vmdk': Could not find the file (600000003)
[fsys\shared]        - VDDK-Log: DISKLIB-LINK  : "PATH_TO_ORIGINAL_BACKUP_SET\VM.vmdk" : failed to open (The system cannot find the file specified).
[fsys\shared]        - VDDK-Log: DISKLIB-CHAIN :"\\\PATH_TO_BACKUP_SET\VM.vmdk": Failed to open parent "PATH_TO_ORIGINAL_BACKUP_SET\VM.vmdk": The system cannot find the file specified.
[fsys\shared]        - VDDK-Log: DISKLIB-CHAIN : "PATH_TO_ORIGINAL_BACKUP_SET\VM.vmdk" : failed to open (The parent of this virtual disk could not be opened).
[fsys\shared]        - VDDK-Log: DISKLIB-LIB   : Failed to open '\\PATH_TO_BACKUP_SET\VM.vmdk' with flags 0x1a The parent of this virtual disk could not be opened (23).
[fsys\shared]        - Calling the vixdiskLib api: VixDiskLib_Open(\\PATH_TO_BACKUP_SET\VM.vmdk, 0 (0x00000000) )
[fsys\shared]        - Calling the vixdiskLib api: VixDiskLib_ConnectEx('Local Server'- '0x198074656' )

[fsys\shared]        - Error Text: 'The parent of this virtual disk could not be opened' Error: '98784263820'
[fsys\vmvcb\pdi]     - Could not open the local disk \\PATH_TO_BACKUP_SET\VM.vmdk. Error Text: 'The parent of this virtual disk could not be opened' Error: '98784263820'
[ndmp\loops]         - LP_ENV::MsgError: error 0xe0009585 processing object VM\VM.vmdk

Solution

A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Documents at the end of this article to obtain the hotfix needed to resolve the issue.

Backup Exec 2012 Rev 1798 Service Pack 3 (TECH205351).

Backup Exec 2010 R3 Rev 5204 Service Pack 4 (TECH208828).

 

 

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