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SnapManager for Hyper-V

Either the specified VM(s) are not present or they cannot be backed up online

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  • Message

    Either the specified VM(s) are not present or they cannot be backed up online

  • Description

    One reason this message occurs is when application-consistent backups fail if the pass-through disk size on the VM is less than 300 MB. Your error log will resemble the following example:

    Log Name:      Application
Source:        SnapMgrServiceHost
Date:          11/12/2012 12:24:28 PM
Event ID:      106
Task Category: Backup Event
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      defiant16.wak-qa.com
Description:
SnapManager for Hyper-V backup failed to complete

Backup Failed for the following VM(s) since it cannot be backedup online or No VM to be found for backup
               VM Name: demovm-0

    There are no other application or system error messages to indicate the failure.

  • Corrective action

    You can either resize the pass-through disk to be larger than 300 MB or run the backup with the Allow saved state VM backup option enabled.

    Note This corrective action is applicable in both SAN and NAS environments.

  • Message

    Either the specified VM(s) are not present or they cannot be backed up online

  • Description

    A second reason this message occurs is because Windows cannot perform an online backup of this system because the scoped snapshots option for Hyper-V VMs is enabled. Scoped snapshots are mainly used by Windows critical updates.

  • Corrective action

    You must disable the scoped snapshots option by creating a DWORD ScopeSnapshots parameter with value 0 in:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\SystemRestore\

    Note This corrective action is applicable in both SAN and NAS environments.