Date: Tue, 21 Aug 2001 10:16:24 +0200 From: Vallo Kallaste <kalts@estpak.ee> To: =?utf-8?Q?S=F8ren?= Schmidt <sos@freebsd.dk> Cc: Jon Noack <noackjr@compgeek.com>, freebsd-smp@FreeBSD.ORG Subject: Re: Bye bye dear SMP-system Message-ID: <20010821101624.A2632@myhakas.estpak.ee> In-Reply-To: <200108201921.f7KJLcA87034@freebsd.dk>
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On Mon, Aug 20, 2001 at 09:21:38PM +0200, S�ren Schmidt <sos@freebsd.dk> wrote: > > I have come across have had to do with the HPT366 controller. I use IBM > > 75GXP hard drives in the machines and enabled tagged queuing (using the > > 'hw.ata.tags="1"' line in /boot/loader.conf). Under heavy reads (but not > > heavy writes - weird), the kernel would post an "ad0: READ command timeout > > <snip> resetting" error followed by an "ad0: invalidating queued requests" > > error. That was shortly followed by a hard lock. I tried 'hw.ata.wc="1"' > > instead and have had no problems (except if and when the UPS dies). I > > could reproduce the error by cvsuping my source tree to RELENG_4_3. The > > first time was fine, as there was some writing because several items were > > being updated (from 4.3-release). Later attempts (which were almost > > solely reads) always resulted in a hard lock. > > The HPT366 has HW issues with some of the fast disk, I havn't been able > to find a solution to that, nor has HPT as far as I'm informed.. Oh no, with Promise one can't use tagged queing at all, with HPT there's another problem... Are there any combinations of controller (such as Promise, HPT), disks and driver which works successfully under load? The whole ATA scene seems totally hopeless. -- Vallo Kallaste kalts@estpak.ee To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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