Skip to main content
SnapManager for Hyper-V

Vss Requestor - Backup Components failed with partial writer error

Contributors

  • Message

    Error: Vss Requestor - Backup Components failed with partial
writer error.
Writer Microsoft Hyper-V VSS Writer involved in backup or restore
operation reported partial failure. Writer returned failure code
0x80042336. Writer state is 5.
Application specific error information:
Application error code: 0x1
Application error message: -
Failed component information:
Failed component: VM GUID XXX
    Writer error code: 0x800423f3
    Application error code: 0x8004230f
    Application error message: Failed to revert to VSS snapshot on the
    virtual hard disk 'volume_guid' of the virtual machine 'vm_name'.
   (Virtual machine ID XXX)

    The following errors appear in the Windows Application event log on the Hyper-V host:

    Volume Shadow Copy Service error: Unexpected error calling routine
GetOverlappedResult.  hr = 0x80070057, The parameter is incorrect.

Operation:
   Revert a Shadow Copy

Context:
   Execution Context: System Provider

Volume Shadow Copy Service error: Error calling a routine on a Shadow
Copy Provider
{b5946137-7b9f-4925-af80-51abd60b20d5}. Routine details
RevertToSnapshot
[hr = 0x80042302, A Volume Shadow Copy Service component encountered
an unexpected
error.
Check the Application event log for more information.].

Operation:
   Revert a Shadow Copy

Context:
   Execution Context: Coordinator

  • Description

    This message appears when performing an application-consistent backup of a dataset. This error causes the backup to fail for some of the virtual machines in the dataset.

  • Corrective action

    • Retry the dataset backup.

    • If the retry attempt fails again, split the dataset into two datasets so that all the VMs whose backup failed will be placed into a single dataset and all other VMs will be put into another dataset. Then run the backup again.