Adaptec SCSI controller problem
Doug Hardie
bc979 at lafn.org
Sun May 11 22:13:46 PDT 2003
On Saturday, May 10, 2003, at 16:57 US/Pacific, Andy Farkas wrote:
> On Sat, 10 May 2003, Doug Hardie wrote:
>
>> I have a system with a Adaptec 2940 Ultra SCSI adapter controller.
>> The
>> original configuration had 1 disk internal and nothing external. The
>> external connector had nothing plugged into it. All worked fine.
>> However, I tried to add a DLT drive to the external connector. On
>> boot, the system hung because it couldn't find the disk. Its supposed
>> to boot off the SCSI drive. Running the adaptec scsi utilities it
>> found both the internal disk and the external DLT drive. The disk has
>> id 0, the DLT 5 and the controller 7. So, I removed the cable from
>> the
>> system as I just didn't have time to address that issue at the moment.
>> However, it still hung at the same point in the boot. No sequence of
>> disconnection of cards, disks, connectors etc. would bring back the
>> boot capability. It consistently gets an error message that there is
>> no terminator. So, I added a terminator on the external jack. It now
>> boots properly. Something has obvioulsy changed but I can't figure
>> out
>> what it is. I still need to use the DLT - with the drive, and I need
>> to return the terminator as its borrowed. Any ideas on how to make
>> this work? Thanks.
>
> Turn off termination on the card (using bios uitility).
>
> Make sure both the disk and the dlt drive have termination enabled.
Thanks for the tip. That worked. I don't know why since the
descriptions of the termination settings in the user's guide has
multiple descriptions (different) for the various settings. I just
tried each till I found one that works. I was able to get the DLT to
work and recovered the data I needed and then got the system to work
without the terminator afterwards.
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