Drive 9 does look to be bad and looks to need to be replaced. As far as the  \Device\Harddisk5\DR29 that is hard to tell how to resolve that as we would  need a DSET from the host server.
Hi, We did just bought 6 new (dell supported drives) drives for our MD300i, and add them to the device, Last week we did create 2 new groups from these 6 new discs, and untill yesterday everything working just fine we could use these 2 virtual discs. today I found alot of error 11 (The driver detected a controller error on \Device\Harddisk5\DR29.) in the system logs of the OS. I did check the drives of the SAN and findout the problematic drive is drive 9,( one of the new drives) and the Guru says that drive has been removed from the group or this drive belong to other group, things that did not really heppend. so the question is, is this new drive defect? or there is something els going on here? [IMAGE]
Disk issue