At 06:26 PM 7/22/02 -0700, Ethan wrote:
>--- Don Maslin <donm_at_cts.com> wrote:
>> The ACB-4000 Series User Manual is about 1/2" thick, Joe, and is not
>> partitioned by specific models. But, I see no reason why a regular SCSI
>> drive could not be installed in lieu of the ACB-4070 and ST-411/506
>> interface drive. Seems to me that I have gone the other way once.
>
>My experiences with Adaptec bridge controllers is that they don't
>support an IDENT packet,
That's correct according to what I've been able to find out.
so the host has to "know" the geometry,
>meaning that _you_ will have to know the geometry of the embedded
>SCSI drive and tell the host since it will not think to ask the
>drive itself.
Hmmm. But how do you tell it the geometry? The User's manual for the system indicated that there are only two drives that work with this system. I wonder if that's because the geometry is hard coded into the HD setup program?
>
>Additionally, whatever (low level) formatting software comes with the host
>might or not might not work with an embedded drive. Modern drives will
>ignore harmful commands, so it's not a risk to the drive, but if there
>is a canned procedure for installing the OS (old variants of UNIX come
>to mind), it might or might not succeed with an embedded drive if it
>was written to expect an ACB-4xxx.
That's what I'm afraid of.
>
>Finally, most Adaptec bridge controllers I know of did support multiple
>LUNs. Some SCSI drives won't like being probed for LUNs and may return
>a hit for every LUN probed (I've seen that happen with some drives on
>an Amiga 3000 which optionally supports multiple LUNs per target ID)
Wonderfull! More problems.
>
>If none of the above differences trip you up, then you should have no
>problem using an embedded SCSI drive in place of your ACB-4070.
I think that should have been <B>IF</B>!
Joe
>
>-ethan
>
>
>__________________________________________________
>Do You Yahoo!?
>Yahoo! Health - Feel better, live better
>http://health.yahoo.com
>
Received on Mon Jul 22 2002 - 22:54:01 BST