DBAN finished with non-fatal errors.
*ERROR /dev/sdb (process crash)
*ERROR /dev/sda (process crash)
Press and hold power button to shut down
When I loaded DBAN manually (by pressing enter at the boot prompt instead of typing "autonuke"), I would see an "unrecognized device" in the device list.
I finally figured out what it was: the DRAC had set up some kind of virtual drives. I had to go into the DRAC menu (Ctrl-D when it asks you at the boot prompt), page down until I saw the virtual drives, and then I pressed E to disable them. Once I did that, DBAN ran just fine.
I just ran into this same problem on a Dell PowerEdge 1950, but it must have had a different DRAC version because the process of disabling of the virtual drives was a little different. I had to press Ctrl-E to get into the DRAC menu when it prompted me, then I had to arrow down to Virtual Media Configuration and change the Virtual media setting from attached to detached.