Date: Mon, 31 May 1999 03:46:58 -0700 (PDT) From: Cliff Skolnick <cliff@steam.com> To: "Joe \"Marcus\" Clarke" <marcus@miami.edu> Cc: freebsd-stable@FreeBSD.ORG, freebsd-smp@FreeBSD.ORG Subject: Re: SMP and SCSI problems in 3.2 Message-ID: <Pine.BSF.4.10.9905310339580.892-100000@lazlo.internal.steam.com> In-Reply-To: <Pine.OSF.4.05.9905272133100.16404-200000@jaguar.ir.miami.edu>
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I had some really strange problems with an Adaptec 2940UW2 controller and a dual CPU system. It looked like an interference problem with the noise of the high speed CPUs somehow getting back into the cable. After re-routing the cables away from both CPUs things worked better, but eventually I had to dump the 2940UW2 for a 2940UW which worked perfectly in the machine. I did try dropping the speed of the UW2 card before swapping, no help. I'm guessing that disabling the SMP code might be shutting down the CPU causing the trouble. Try replacing the cables, re-routing cables and or a non UW2 controller. Cliff On Fri, 28 May 1999, Joe "Marcus" Clarke wrote: > Recently, we installed 3.2-RELEASE on our primary Computer Science server, > and began to see some severe errors when trying to do intensive (i.e. > dump/restore) disk operations to any of our SCSI-attached disks. The > errors we are getting are as follows: > > (da0:ahc0:0:0:0): SCB 0x29 - timed out while idle, LASTPHASE == 0x1, > SEQADDR == > 0x8 > (da0:ahc0:0:0:0): Queuing a BDR SCB > (da0:ahc0:0:0:0): Bus Device Reset Message Sent > (da0:ahc0:0:0:0): no longer in timeout, status = 34c > ahc0: Bus Devices Reset on A:0. 3 SCBs aborted > > Disabling SMP seems to clear up some of this, but we were hoping to get > SMP and SCSI working together. Our SCSI card is an Adaptec 2940UW2. > Attached is the kernel config file in use. If this seems like a > termination problem, we're doubting it since we had this working with an > early version of 3.0-SNAP with CAM. > > Joe Clarke > > > -- Cliff Skolnick | "They that can give up essential liberty to obtain Steam Tunnel Operations | a little temporary safety deserve neither liberty cliff@steam.com | nor safety." http://www.steam.com/ | -- Benjamin Franklin, 1759 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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