Setup:
DPM Server = DPM 2012 SP1 running on Server 2008 R2.
Protected Server = Server 2012 Standard.
We are trying to backup 10TB+ of data from server 2012. Various file sizes from a few MB to 4TB stored in multiple folders (F:\db_backups\folder1\ then F:\db_backups\folder2\ etc)
The F drive on the on the protected server is 18.4TB total wih about 8TB free.
I have tired setting up the protection group in mutlple ways. For example, 1 datasource being the db_backups folder or the entire F: volume or each subfolder as a seperate datasource. We only run this backup once a week for long term tape backup (no shortterm disk backups)
All backups of that server/protection group fail with shadow copy errors. The errors from DPM vary, but the errors from the procted server are the same.
I have contacted MS Support, the DPM team ran diagnostics but then directed me to the setup team to troubleshoot VSS from the protected server. Various things were changed, but nothing has helped. Right now shadow copies are set to no limit on the same volume.
Here is a sample error from DPM:
DPM failed to access
the volume
\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy18\
on PROTECTEDSERVER.domain.com. This could be due to
1) Cluster failover during backup or
2) Inadequate disk space on the volume.
(ID 2040 Details: The device is not ready (0x80070015))
Errors from the protected server event log.
The shadow copies of volume F: were aborted because the shadow copy storage failed to grow.
We've tried multipe VSS settings, minimized IO on the volume, tried pointing VSS to another volume. Regardless, it vails with that shadow copy error. It's almost like it wants to do a 1 to 1 shadow copy, and not deleting anything as it progress through the different files being backed up.
Any suggestions?