[9286] in linux-scsi channel archive
Timeout problems using a SCA <--> UW Adapter
daemon@ATHENA.MIT.EDU (Prophete J. Charles)
Wed Aug 2 11:41:49 2000
From: "Prophete J. Charles" <prophete@neuronet.pitt.edu>
To: <linux-scsi@vger.rutgers.edu>
Date: Wed, 2 Aug 2000 11:35:36 -0400
Message-ID: <NCBBJOFEEKOGILIAJPNNAENOCEAA.prophete@neuronet.pitt.edu>
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I have been using an Adaptec 2940UW scsi card with no problems ( until I did
the following. I only had narrow devices on the card (a drive and cdrom) but
I found a nice Quantum SCA LVD/SE drive. Since I don't have an sca card (if
such a thing exists), I am using an sca-UW adapter. I set the drive for SE
operation and attach it using the adapter to the UW (68 pin) connector on
the card. it is recognized, low level formatted and verified with no
problems. On the internal 50 pin connector, I have a cdrom connected. The
problem is that I am using Linux and I can't get the installation program
(Mandrake 7.1) to finish without the machine hanging in scsi timeout/reset
errors. So far here is what I have tried:
1 - The drive synchs at 40MB/s and I have tried turning this down a notch
(disabling UW negotiation) with no success. Has anyone ever had any problems
using on of these adapters?
2 - I tried cloning the narrow drive to the sca one and booting the kernel
(2.4-pre4) and the result is the same timeout/reset loop.
3 - Tried installing RedHat 6.2 and this time the scsi timeout occurred on
the cdrom instead of the hard drive.
4 - Tried using another 2940 with an older bios (1.23) and that did not
work.
5 - Tried replacing the UW cable and tried using a cable with a terminating
end instead of terminating the adapter card.
Any ideas out there?
Prophete J. Charles
University of Pittsburgh
Department of Bioengineering
Laboratory for Computational Neuroscience
prophete@neuronet.pitt.edu
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