Cannot delete Shadow Copies from Microsoft Volume Shadow Copy Services (VSS) or change their storage location if Continuous Protection Server (CPS) is installed. The snapshot "shadow copies" (Snapshot GUIDs) also cannot be deleted via Windows Explorer or automatically by Windows.
Error 0x8004231d: The specified shadow copy storage association is in use and so can't be deleted
This issue occurs if there are active Snapshots in CPS.
a. Go to the Properties of a Drive in Windows Explorer. Go to the Shadow Copies tab. Select a Drive and click Settings
If this fails, proceed to step 2.
To delete the Snapshots, go to a command prompt (Start > Run > CMD), type the following, and press Enter:
vssadmin delete shadowstorage /for=X: [/on=X:] [/quiet]
* X: represents a specific volume
* Deletes an existing shadow copy storage association between volumes specified
* If the /on switch is not used, all shadow copy storage associations will be deleted for the volume specified i the command
If this fails to delete the Snapshot, proceed to step 3
Delete the snapshots under the CPS console:
a. Stop the Volume Shadow Copy Service.
b. Open the CPS console, go to Tools > CPS Services > Restart All Services.
c. Within CPS, click the Setup tab and go to Backup Destinations. Right-click on the backup destination on the drive to delete snapshots and select "View Snapshots". Delete all snapshots listed.
d. Open Windows Explorer. Go to any Properties of any drive and select the Shadow Copies tab. Click on the desired volume and ensure that the "Used" column reads "0 bytes on X:\" (where X:\ is the current Snapshot destination for VSS).
e. To re-associate a partition, click Settings, Select the pull down under "Located on this volume:" and select the new destination volume. Set the appropriate limits and click "Ok". Click "Ok" again.
If all steps above do not resolve the issue, proceed to step 4.
Reboot the media server