[6955] in linux-scsi channel archive
Re: Is my cable bad?
daemon@ATHENA.MIT.EDU (Kurt Garloff)
Wed Aug 4 11:40:26 1999
Date: Wed, 4 Aug 1999 12:11:10 +0200
From: Kurt Garloff <garloff@suse.de>
To: Anders Eriksson <anders.c.eriksson@era.ericsson.se>
Cc: linux-scsi@vger.rutgers.edu
Mail-Followup-To: Anders Eriksson <anders.c.eriksson@era.ericsson.se>,
linux-scsi@vger.rutgers.edu
In-Reply-To: <199908040812.KAA23932@heaven.wii.ericsson.net>; from Anders Eriksson on Wed, Aug 04, 1999 at 10:12:51AM +0200
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On Wed, Aug 04, 1999 at 10:12:51AM +0200, Anders Eriksson wrote:
>=20
> Hi all,
> I have 7 disks (rather old 1 gigs & 2gigs) on a bus (aha2710 if I remembe=
r=20
> correctly). I'm experiencing ramdom timeouts on the bus, especially under=
=20
> heavy load. The cable has the disk connectors only 5 cm apart. Is that to=
o=20
> little? It is ~2.5m total length.
5cm is too little. S-" draft recommends 30cm distance.
However, under heavy load the SCSI timeouts may be triggered by SCSI bus
congestion. have you enabled the Disconnection feature of your SCSI host
adapter? (You should!) Do all of your disks support disconnection?
Maybe increasing the timeout helps you, but normally it should _not_ be
necessary.
Regards,
--=20
Kurt Garloff <garloff@suse.de> SuSE GmbH, N=FCrnberg, FRG
Linux kernel development; SCSI drivers: tmscsim(DC390), DC395
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