Common DPM Errors...

Since we've now got most of the Data Protection Manager 2010 installations done, I thought I'd share a few common issues we've come across, and the fixes. Maybe this'll save you a LOT of hassle...

"Access Denied (0x80070005)"
Common causes are listed all over the place, suggesting Firewalls as the issues and DCOM Permissions. All entirely possible. One other thing to consider, especially if you've setup Forest Trusts etc, just make sure you've made sure the AD Network holding your DPM Server(s) is fully accessible - and that this traffic isn't restricted either! In our case, we had a Cluster with 2 servers, one in a Subnet (we'll call this Subnet A), another in a different subnet (Subnet B) and our DPM Servers (and the DPM AD Network) in another (Subnet C).

While Subnet A and B could talk without restriction, and A could quite happily talk to C, for historical reasons, B and C weren't completely open for communication. So my tip - make sure you've considered Active Directory Authentication and not just "DPM to Protected Server" issues!

Agents are "unavailable" and "VssError: Invalid value for registry"

This ia bit of an odd one and just "happened" on a previously perfectly happy server. We resolved this by simply removing the account used to push out the agents in the DCOM Config (run "dcomcnfg.exe"), find the "DPM RA" in the list and remove/readd the user. No idea what caused that mind!

Replica is inconsistent with System State and repeatedly so...

Especially if you're on a Windows 2003 SP-2 32-bit system? Yep, thought so. You've probably just not got enough space on the system drive (normally C:\). You should move the normally hidden "DPM_SYSTEM_STATE" folder to another drive, ideally with +10GB free, and then update the data source...

\Microsoft Data Protection Manager\DPM\datasources\PSdataSourceConfig.xml

change:

%SystemDrive%\DPM_SYSTEM_STATE\*

so it points to wherever you put it... easily sorted.


Hopefully they'll help you for now, more tips later!