Date: Tue, 16 Dec 1997 18:29:04 +0100 From: Marcus Haebler <mh@muenster.net> To: "'freebsd-questions@freebsd.org'" <freebsd-questions@freebsd.org> Cc: "'Norman C Rice'" <nrice@emu.sourcee.com> Subject: RE: Adaptec 2940UW and 7 disks results in bus resets (solved) Message-ID: <01BD0A50.7DC44C80.mh@muenster.net>
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> On Tue, Dec 16, 1997 at 11:15:13AM +0100, Marcus Haebler wrote: > > Hi, > > > > we just added a disk to our FreeBSD-2.2-stable (about 6 months old) > > and are running into major problems with those 7 disks. The disks > > are connected to an Adaptec 2940UW. Are there any known problems > > with FreeBSD and the Adaptec 2940UW? A bus reset occurs every > > two minutes. I just grabed part of the error messages out of tonights > > daily report. It looks like that: > > I have experienced similar problems; it turned out that the overall > length of my SCSI cables was too long. The length of the internal flat > ribbon cables cables becomes very significant when several drives > are cascaded. I had to get some custom cables built (very short lengths) > and all has been well ever since. It was exactly that! The cable was to long after adding another drive. The few inches inside the slot added the problem. I connected the rack with a very short cable (<10 inches) to the adapter and now it works fine! Thanks to all those who gave me some helpful hints! Marcus Haebler --- ICS Internet Communication Systems GmbH Soester Strasse 13 Tel.: +49 251 6060-0 mailto:support@muenster.net 48155 Muenster (Germany) Fax.: +49 251 6060-190 http://www.muenster.net
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