[3113] in linux-scsi channel archive
Re: 50/68 problem??
daemon@ATHENA.MIT.EDU (yuri mironoff)
Fri Jan 23 11:27:57 1998
Date: Fri, 23 Jan 1998 11:08:21 -0500 (EST)
From: yuri mironoff <yuri@buster.rgti.com>
To: Mike Nachlinger <mnach@northstar.apres.org>
Cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.LNX.3.96.980122154341.535C-100000@northstar>
* Try disabling "TI sync negociation" on the DCAS.
* The Adaptec board seems to prefer Active termination.
* Try replacing you cables with "Granite" teflon ones.
* You can can get a SCA-SCSI adapter - as a matter of fact I have 2 of
them - $15 a pop - if you're interested.
Good luck,
Y.
On Thu, 22 Jan 1998, Mike Nachlinger wrote:
>
> Hi All,
>
> I have an ASUS P55T2P4 120mhz. P5 w/96meg EDO, an Adaptec 2940
> circa 1994??? with 5 50pin drives attached.
> Kernel is 2.0.33 with Doug Ledford's aic7xxx-5.0.0 patch
> 4 months ago I added an IBM DCAS-34330W to the bus. This is a
> 68 pin device attached with a 50/68 pin adapter. Ever since adding
> this device, under heavy i/o the scsi bus will lock up. (expiring
> news, updatedb, cron.daily) 6 out of 7 days this ocures when
> cron.daily runs. I've put in a new scsi cable, 6 feet w/nodes @
> 12" intervals, active termination at both ends. Since adding Dougs
> patch the system stayed up 3 days before a lockup.
>
> Questions;
>
> 1) Are there known firmware problems with the DCAS-34330W
> 2) Does a 50/68 pin adapter terminate the extra data lines.
> If so, active or passive. If not could this be the
> problem source? Is a 50/68 pin adapter available with
> active termination?
> 3) Would I be better off trashing the 2940 and putting in
> a DPT 2144UW. (future raid5)
> 4) Regarding #3 above, would I have the same problem mixing
> 50 and 68 pin drives?
> 5) Can you mix SCA drives and SCSI-3 on the same bus.
> (more future raid thinking)
>
> Thanks for the help.
> Hope these questions aren't too boneheaded for this group!
>
> -Mike
>
> Mike Nachlinger Apres Ski Club, Inc.
> 1-888-APRESGO www.apres.org mnach@apres.org
>
>
>
>
