Hi,
iam trying to Restore a Fileserver Backup to an external disk, directly connected to DPM Server!

With DPM 2010 we have no problems do this!
But after Upgrade to DPM 2012 (Upgrade without problems), i can't restore to the external disk anymore.
It raises always Error ID 31085!

When i try to restore some of the data to an internal disk, i have no problems to do this!

Is this a known problem of DPM 2012

best regards

Alex

Hi

Does it log any info in the event log? That error sounds like it cannot detect the volume.

Is it a dynamic disk or basic disk you trying to restore to?

Hi,

i found no info in the event log!
Its a basic disk!

My only workaround:
1. Create a VHD File on the external harddisk
2. Initialize it and map a drive-letter
3. Start Restore on the new drive (vhd located on the drive volume where the error occurs)
4. Call script Get-Datasource -ProductionServer <ProductionServer> -Inquire ...

Here the restore works (not directly to the volume, only over mapped VHD Volume)

best regards

Alex

I have seen this also happen on DPM 2010 where you need to create a VHD and map the drive letter. 

Try to reformat the external drive with 512k sectors. I had the same issue with DPM 2012 and that fixed it.

I reformat the drive with 512k sectors! Same Problem!

Only if i delete the volume and create a new volume DPM use the drive correctly!
I tried 10 different disks.

• Proposed as answer by Vimal_Rai Saturday, October 05, 2013 7:47 PM

Dear AlexAT78,

i was looking for a solution from last many days for the same issue and you gave me the solution.

I deleted the volume on external disk and created a new one and that solved the issue.

Thanks a lot.

• Edited by Vimal_Rai Saturday, October 05, 2013 7:50 PM
• Marked as answer by AlexAT78 Monday, February 17, 2014 9:01 AM

Hi..

in our case simply change the drive letter of the affected drive solved the problem :)

I was not able to restore to any external drive.  I followed this post and it worked:  Basically you have to unmark the volume for Deletion in SQL.

ttps://social.technet.microsoft.com/Forums/en-US/1ea33f95-1aea-46bc-b4fb-902417b52ff9/dpm-2012-restore-to-usb?forum=dpmdrbackup

That sounds good!

Thx for this post.