We've been running DPM 2012 for a couple months now after replacing our old failing backup system. Everything is going great other than we're having real issues backing up 2 volumes from one of our file servers. Both of these volumes have dedup enabled.
We are running DPM 2012 R2 (4.2.1417.0) on Server 2012 and the dedup role is installed.
I have checked the 'details' of each failure and they're both pretty much identical;
Type: Synchronization Status: Failed Description: The replica of Volume V:\ on SERVERNAME is not consistent with the protected data source. (ID 91) More information End time: 13/06/2016 18:35:41 Start time: 13/06/2016 18:35:40 Time elapsed: 00:00:00 Data transferred: 0 MB Cluster node - Source details: V:\ Protection group members: 7 Details Protection group: File Servers
Because the synchronisation fails the Recovery Point then also fails
Type: Recovery point Status: Failed Description: No recovery point was created, either because synchronization has not occurred since the last recovery point was created, or because no changes were found during synchronization. (ID 208) More information End time: 13/06/2016 18:04:09 Start time: 13/06/2016 18:04:06 Time elapsed: 00:00:02 Data transferred: 0 MB Source details: T:\ Protection group members: 8 Details Protection group: File Servers
All of the other drives on this particular server are backing up fine so I'm pretty sure it's an issue with them being dedup'd at this point.
Does anyone have any further advice on what could be causing this? I have aleady ran several consistency checks but they take days to finish and when they do they're pretty much straight back to inconsistent.