When you have disks that are physically attached to a server that is running Microsoft System Center 2012 Data Protection Manager (DPM 2012 or DPM 2012 R2), the disks are displayed in Disk Management as expected, however when you try to add them to the Data Protection Manager disk pool, Data Protection Manager may not enumerate some of the disks. Because of this, they cannot be added to the disk pool. No error is generated in the GUI and a rescan does not help. Also, when you use the get-dpmdisk command in the Data Protection Manager Management Shell, these disks are not enumerated there as well.
For all the details regarding this issue, why it occurs and how to resolve it, please see the following:
KB3032775 - Some disks are not enumerated when you try to add them to a Data Protection Manager disk pool (http://support.microsoft.com/kb/3032775)
J.C. Hornbeck| Solution Asset PM | Microsoft GBS Management and Security Division
Get the latest System Center news onFacebookandTwitter:
Main System Center blog: http://blogs.technet.com/b/systemcenter/
Configuration Manager Support Team blog: http://blogs.technet.com/configurationmgr/
Data Protection Manager Team blog: http://blogs.technet.com/dpm/
Orchestrator Team blog: http://blogs.technet.com/b/orchestrator/
Operations Manager Team blog: http://blogs.technet.com/momteam/
Service Manager Team blog: http://blogs.technet.com/b/servicemanager
Virtual Machine Manager Team blog: http://blogs.technet.com/scvmm
Microsoft Intune: http://blogs.technet.com/b/microsoftintune/
WSUS Support Team blog: http://blogs.technet.com/sus/
RMS blog: http://blogs.technet.com/b/rms/
App-V Team blog: http://blogs.technet.com/appv/
MED-V Team blog: http://blogs.technet.com/medv/
Server App-V Team blog: http://blogs.technet.com/b/serverappv
Forefront Endpoint Protection blog: http://blogs.technet.com/b/clientsecurity/
Forefront Identity Manager blog: http://blogs.msdn.com/b/ms-identity-support/
Forefront TMG blog: http://blogs.technet.com/b/isablog/
Forefront UAG blog: http://blogs.technet.com/b/edgeaccessblog/
Application Proxy blog: http://blogs.technet.com/b/applicationproxyblog/
The Surface Team blog: http://blogs.technet.com/b/surface/