[miod]

I can hear the disk spinning when I power it up, but no head movement. I can't tell if it's spinning at full speed or not, but the hum is very even.  I checked the voltages while it's running and they are right at 5v and 12v and the amp draw matches the idle current the specs list.  I think I am giving it enough power but can't know for sure.

I've used the sg3-util package as suggested to try and get the drive to fully spin up. I just tried sg_turs and it reports the same information immediately. Drive makes no noise. I don't see any power fluctuations when I send those commands.

Then I'd suspect the on-disk electronics (the controller board).

Would termination be an issue? The drive itself has no terminators, I've tried it with and without a terminated device after the drive with the same results. From what I recall, bad termination means drives simply don't show up. I can mount other SCSI devices on the chain so I know communication is working.

Since the disk gets recognized with a unique ID and answers commands, there is no cabling or termination problem.