Date: Fri, 07 Mar 2003 08:13:09 -0700 From: Scott Long <scott_long@btc.adaptec.com> To: David Schultz <das@freebsd.org> Cc: "Marc G. Fournier" <scrappy@hub.org>, freebsd-stable@freebsd.org Subject: Re: bug in aac driver ... ? Message-ID: <3E68B705.4070409@btc.adaptec.com> In-Reply-To: <20030307090449.GB61037@HAL9000.homeunix.com> References: <20030305224856.R38115@hub.org> <20030307090449.GB61037@HAL9000.homeunix.com>
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David Schultz wrote: > Thus spake Marc G. Fournier <scrappy@hub.org>: > >> I have an Intel server (SVW7500, or some designation like that) setup >>with an Adaptec 2120S controller in it: >> >>aac0: <Adaptec SCSI RAID 2120S> mem 0xf8000000-0xfbffffff irq 2 at device 9.0 on pci1 >>aac0: i960RX 100MHz, 48MB cache memory, optional battery present >>aac0: Kernel 4.0-0, Build 5770, S/N 232fb7 >> >> Originally, when we installed it, we had a problem where, while booting, >>you would suddenly get the 'aac timeout' message scroll up the screen, >>that has/had since been fixed ... >> >> Yesterday, after doing some work on one of our servers to increase the # >>of vnodes, I added and built a new kernel with: >> >>options VM_KMEM_SIZE="(400*1024*1024)" >>options VM_KMEM_SIZE_MAX="(400*1024*1024)" >> >> Which I have running on venus (its using an AMI RAID card) without any >>hassles ... upon reboot of the Adaptec/Intel server, I once more am >>getting the Timeouts and inability to boot ... a kernel built 10 minutes >>earlier, without those options, but the exact same code, runs fine, so >>something with the VM_KMEM_SIZE increase is causing the problem ... > > > I don't know why VM_KMEM_SIZE would tickle a RAID controller > problem, but I've seen timeout message similar to the one you > describe with a flaky SCSI controller. (Try statically compiling > all relevant drivers into the kernel if you're not already.) The > fix for me was to reduce the tag depth with camcontrol. Try a > value around 8 or so; there shouldn't be much, if any, of a > performance difference. > > camcontrol tags devicename -N8 > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message The aac driver does not use the CAM SCSI interface for accessing its RAID arrays, so changing parameters there will have no effect. Scott To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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