Date: Thu, 27 Jan 2000 12:14:02 +0100 From: "Oliver Blasnik" <ob@omnilink.net> To: "Kenneth D. Merry" <ken@kdm.org>, "LukeUnix" <lukeunix@infosite.com> Cc: <freebsd-scsi@FreeBSD.ORG> Subject: Re: CMD problems Message-ID: <01c601bf68b7$9da58ec0$da1940c2@omnilink.de> References: <200001251721.JAA32558@infosite.com> <20000125131901.A96487@panzer.kdm.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi there, Luke had some (well known) Problems: > > I am having problems with a CMD CRD-5440 with multiple luns. The config is 2 > > /kernel: (da2:ahc1:0:1:0): SCB 0x18 - timed out while idle, LASTPHASE == > > 0x1, SEQADDR == 0xa > > /kernel: (da2:ahc1:0:1:0): Queuing a BDR SCB > > /kernel: (da2:ahc1:0:1:0): Bus Device Reset Message Sent > > /kernel: (da2:ahc1:0:1:0): no longer in timeout, status = 34b > > /kernel: ahc1: Bus Device Reset on A:1. 2 SCBs aborted > > /kernel: (da2:ahc1:0:1:0): SCB 0x28 - timed out while idle, LASTPHASE == > > 0x1, SEQADDR == 0x9 Go into CMD-Setup via serial, disable "Tagged Queuing" on the/all Host-Channels. Kenneth stated: > The short answer is "don't do that". > Other folks have discovered that the CMD RAID arrays don't quite work right > with more than one LUN enabled. > Sorry I can't provide any solutions here, but this is almost certainly a > problem with CMD's firmware, and the workaround is to only use one LUN on > the controller. True, the problem is that crappy firmware, which does not currectly share the commandqueue between multiple LUNs. If you _need_ multiple LUNs per Hostchannel, disable tagged queuing. This slows down disk-i/o a little bit, but the CMD works out very well due to the fast cache-access. Cu, Oliver -- __ OMNILINK Internet Service Center GmbH / \ Hahnstrasse 70, 60528 Frankfurt __\ /_________ Tel.: (0 69)66 44 10 Fax: (0 69)66 44 11 99 O M N I L I N K http://www.omnilink.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?01c601bf68b7$9da58ec0$da1940c2>