The dban-1.0.6 release does not have a driver for the LSI MPT device in the Dell PowerEdge 1850, but it should not hang. The Intel Xeons with EMT64 are a bit flakey, so if you have time, then upgrade the BIOS and try DBAN again.
The current beta for dban-1.0.7, which has not been posted, has the MPT driver.