Urgent: older server disk failed, need mirror replacement

[up at 3.am]

Hi:

Sorry for the hectic nature of this, but I just got a kernel notification 
(and confirmed using aaccli's disk list) that one of my RAID level 1 disks 
on one of my servers has died.   The problem is, I'm not entirely sure 
exactly what replacement I should be ordering.  Is there a command line 
utility that gives you the manufacturer's info (model no, part no) of the 
disk itself?  I looked at some of the disk utilities in 
ports/systutilities and I'm not seeing anything.  Here is what I think I 
know:

IMB/Hitachi 72GB or 73GB 10k or 15k RPM U320 SCSI

I built this server 3 or 4 years ago...the RAID adapter is a low profile 
Adaptec U320 RAID using the aac driver.  Are the newer, SAS drives 
downward compatible with U320 adapters?  Is it ok to mix and match, as 
long as the drives are close in storage capacity?  What about mix and 
matching 10k and 15k rpm?

Thanks in Advance!

James Smallacombe		      PlantageNet, Inc. CEO and Janitor
up at 3.am							    http://3.am
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