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Thursday, April 14, 2016

DPM error 0x80042306 after attaching missing disk

Our DPM server has local storage and a disk attached through FC.
Something went wrong in FC infrastructure and FC disk dissappeared for a while and we got error "Missing Disk" in DPM. We resolved issue with FC, restarted DPM and everything seemed to be ok.
But this is where interesting things started...

Backup job which used FC disk started to fail. DPM showed error:
An unexpected error occurred on DPM server machine during a VSS operation. (ID 207 Details: VssError:The shadow copy provider had an error. Check the System and Application event logs for more information.
(0x80042306))

and there was this error in event log
 Volume Shadow Copy Service error: Unexpected error DeviceIoControl(\\?\Volumeguid} - 0000000000000308,0x0053c06c,0000000DEAF120F0,0,0000000DEAF1E1B0,4096,[0]). hr = 0x80070005, Access is denied.

after a bit of struggling I found this KB article https://support.microsoft.com/en-us/kb/2914152, luckily it was for Windows Server 2012 and we had Windows Server 2012.
Hotfix was installed, server restarted and I almost started to clap hands, but backup jobs still failed unfortunately, this time with error 
An unexpected error occurred on DPM server machine during a VSS operation. (ID 207 Details: VssError:The specified object was not found.
(0x80042308))

As there were not many protected resource on the FC disk, the easiest way was to recreate the affected protection groups.

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