From owner-freebsd-current Sun Jan 9 18:21:51 2000 Delivered-To: freebsd-current@freebsd.org Received: from relativity.student.utwente.nl (wit389306.student.utwente.nl [130.89.234.166]) by hub.freebsd.org (Postfix) with ESMTP id 54B8614D55 for ; Sun, 9 Jan 2000 18:21:41 -0800 (PST) (envelope-from djb@Wit389306.student.utwente.nl) Received: by relativity.student.utwente.nl (Postfix, from userid 1001) id 8A8F11DA7; Mon, 10 Jan 2000 03:20:17 +0100 (CET) Date: Mon, 10 Jan 2000 03:20:17 +0100 From: "Dave J. Boers" To: Christian Carstensen Cc: Joao Pedras , freebsd-current@freebsd.org Subject: Re: freezing... Message-ID: <20000110032017.A499@relativity.student.utwente.nl> Reply-To: djb@relativity.student.utwente.nl References: <20000110025813.A353@relativity.student.utwente.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0i In-Reply-To: ; from cc@devcon.net on Mon, Jan 10, 2000 at 04:10:37AM +0100 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, Jan 10, 2000 at 04:10:37AM +0100, Christian Carstensen wrote: > this runs stable for 3 hours now... > try a current kernel (checked out 4 hours ago), using a version of the > file /usr/src/sys/pci/ahc_pci.c from 2000/01/06. ok, maybe it's not by any > means stable, but works better than everything else within the last 24 > hours. Actually, I've booted a kernel from just before newyear (28 december) which works _reasonably_ fine (although it's the same kernel that gave me the lockup earlier) with a userland of today. Problem is that the lockups (I think) are ahc-related and my SCSI hard drive did refuse to come online on one or two occasions while booting the system cold... I therefore concluded that it might be a problem with the hardware. Now (with the new kernel) I find the scsi system unstable and I have doubts again. One piece of information might also be useful in this context. After the system lockup I sort of benchmarked the scsi performance by doing "dd if=/dev/zero of=./testfile bs=1000000 count=128" (actually I varied the blocksize) and got a _very poor_ performance of only 4 Mb/sec (which is usually around 10 to 12 Mb/sec). I isolated my drive to be the only scsi device and I even clocked the SCSI bus down from 20 Mhz to 8 Mhz, but to no avail. In the mean time, I disconnected my scsi hard drive and I am running from my IDE disk. Regards, Dave Boers. -- djb@relativity.student.utwente.nl To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message