Hi everyone, Marc Reynolds here. I have seen some issues recently where DPM volumes are flagged as “missing” in the DPM console so I wanted to take a minute and show you an easy way to fix this.
In System Center Data Protection Manager, DPM volumes are showing as missing. In the DPM admin console (MMC) under Management\Disk, the storage pools disks have a red "x". In Disk Manager the disks have a status of "Errors" and the volumes are listed as "Healthy at Risk". The option to reactivate the disks is grayed out. In addition, the system event log may contain the following volsnap error:
Log Name: System Source: volsnap Date: Event ID: 86 Task Category: None Level: Error Keywords: Classic User: N/A Computer: DPMServer.domain.com Description: Volume C:\...es\Microsoft DPM\DPM\Volumes\Replica\File System\vol_79ec325a-145d-4bfc-a089-68fed8e0aeed is offline for shadow copy protection. A read or write failure to shadow copy storage occurred. Please ensure that the shadow copy storage is still present in the system. Please try clearing the protection fault or restart the computer. If all else fails, revert out of shadow copy protection mode to reclaim the use of the volume while losing the shadow copies.
Disk I/O errors have caused the disk to log errors and the volumes to be flagged as "Healthy at Risk". DPM checks the status of the volumes and if it finds a volume in any state other than "Healthy" it reports the volume as missing and the DPM jobs linked to that volume will fail.
If any of the volumes are showing up in Disk Manager as "Raw" you will need to bring them out of Shadow Copy Protection mode using vshadow-x64.exe
Marc Reynolds | Senior Support Escalation Engineer
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I am looking to create either a rule or a monitor in Operations Manager to detect this event and create an alert. Is there another event that would indicate that the disk is now healthy? If I can pair up this event ID 86 as the "unhealthy" event with another event as the "healthy" event, I can create a SCOM monitor that will show health state of the DPM server.
I'm trying to find the vshadow-x64.exe utility to remove some disks from shadow copy protection. In the VSS SDK I have, the vshadow utility doesn't support the -cpm switch. I'm running 2008 R2. Do you know which SDK includes the vshadow utility with the -cpm switch?
How about when this occurrs and the drives don't actually go missing?
Great post, solved my problem. Thank's!