LTO3 tape drive not detected

[Joe in MPLS]

This was originally posted on the freebsd-questions list. It was 
suggested that I post it here:

I have FreeBSD 8.2-RELEASE running on an HP DL360 G5. I recently added 
an (HP branded) LSI Logic single channel SCSI 320 card and attached an 
HP Ultrium 920 LTO3 tape drive.

The system sees the SCSI controller as mpt0, and it seems to know 
there's something at SCSI ID 4, but I get an "AutoSense Failed" for 
hba/id/lun 0:4:0 at boot and subsequent camcontrol rescans.

I checked the supported hardware doc for the release but it doesn't get 
very specific about tape drives. This is my first experience with LTO3 
tape. I was hoping that I'd automagically get a /dev/sa0 device like I 
always did with my old DLT drives but it wasn't to be this time.

Is there a way to make this drive work?