===== [V7] ISSUE: AhsayOBM/AhsayACB v7 file backup jobs ends with "Snapshot for Shadow Copy Set is missing, backup terminate." error =====
Article ID: 5246
Reviewed: 2017-06-19

Product Version:
AhsayOBM/AhsayOBM: 7.5.0.0 to 7.x
OS: Windows

ATTENTION 1st January, 2022: v7 officially End-of-Life [details] ===== Problem Description ===== When perform a file backup up on AhsayOBM/AhsayACB v7 the job ends with "Snapshot for Shadow Copy Set is missing, backup terminate." error.

No. Type Timestamp Log
* ... ... ...
* erro YYYY/MM/DD hh:mm:ss Snapshot for Shadow Copy Set is missing, backup terminate.
* info ... ...

===== Cause ===== The error message is returned by the Microsoft Windows Volume Shadow Copy Service (VSS).

To support backups of volume mount points on Windows file backup sets on AhsayOBM/AhsayACB v7, if "Volume Shadow Copy" option is enabled , AhsayOBM/AhsayACB v7 will initiate a VSS snapshot of all local drives found on the machine regardless if the drive has been selected in the backup source.

This behavior different from AhsayOBM/AhsayACB v6 which only initiates a VSS snaphot of a local drive selected in the backup source.


===== Resolution ===== If the client machines are not configured with volume mount points and there are persistent "[Shadow Copy] Snapshot for Shadow Copy Set is missing, backup terminate." backup errors.

As a workaround you could consider reverting the current AhsayOBM/AhsayACB v7 VSS snapshot behavior back v6, this can be done by:

  1. Editing the %OBC_INSTALLL_PATH%\ cb.opt file

    Example:
    # Set option to true for disabling adding all volumes to shadow copy set
    com.ahsay.obx.core.backup.file.ShadowCopy.disableAddAllVolumes=true

  2. Restart AhsayOBM/AhsayACB scheduler service.

===== Keyword ===== VSS, Volume Shadow Copy Service, volume mount point