Volume Shadow Copy unexpected error 0x800423f

[humbletech99]

I've configured Volume Shadow Copy on several 2003 servers but this last one isn't working. When I right-click properties on any drive and go to the Shadow Copies tab I get the following error:

Failed to retrieve volumes that are eligible for shadow copies

Error 0x8004230f: The shadow copy provider had an unexpected error while trying to process the specified operation.

I suspect this is because one of the drives is a TrueCrypt encrypted drive (the d drive only). This must somehow interfere with Volume Shadow Copy service, because I can't even open the shadow copy tab, let alone actually set up shadow copies on a non-encrypted drive.


In the Event Logs there are entries:

Source: VSS
Category: None
Type: Warning
Event Id: 12290

Volume Shadow Copy Service warning: GetVolumeInformationW(\\?\Volume{757fd743-aa42-11db-88e7-00e081479154}\,NULL,0,NULL,NULL,[0x00000000], , 260) == 0x00000057. hr = 0x00000000.


Source: VSS
Category: None
Type: Error
Event Id: 12293

Volume Shadow Copy Service error: Error calling a routine on the Shadow Copy Provider {b5946137-7b9f-4925-af80-51abd60b20d5}. Routine details IVssSnapshotProvider::QueryVolumesSupportedForSnapshots(ProviderId,29,...) [hr = 0x8000ffff].

Any ideas on this?