From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Walrond Subject: Re: [PATCH md 2 of 4] Fix raid6 problem Date: Fri, 4 Feb 2005 09:04:38 +0000 Message-ID: <200502040904.38264.andrew@walrond.org> References: <200502031743.j13Hha910546@www.watkins-home.com> <42026860.1000409@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit In-Reply-To: Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi Gordon, On Thursday 03 February 2005 19:36, Gordon Henderson wrote: > > However, I then got production hardware - Tyan Thunder K8W twin Opteron > board, 4-port SATA on-oboard, 2x2-port SATA in PCI slots (all SII chipset) > and it all went pear-shaped from there. The system locks solid whenever I > try to use the disks off the PCI SATA controllers doing anything much more > than run fdisk on them. (It just stops, no oops, cursor stops flashing on > the display, it needs a hard-reset to get it going again) I've tried PCI > slot positions, fiddling with mobo jumpers, BIOS options, and so on. I > can make it work for varying degrees of "work", however blood is currently > flowing over the edge and gathering in a pool at my feet. Even getting it > to boot off the SATA drives was a challenge in itself (which still isn't > solved to my satisfaction) > > Anyone using Tyan Thunder K8W motherboards??? > I'm using K8W's here with a combo od raid0/1 on on-board SATA, and its been rock solid for months (2.6.10). Looks like your problems are all with the PCI cards, but I can't help there. Since you are using vanilla 2.6.10, Jeff Garzik (SATA maintainer) should be interested/helpful on LKML if you want to pursue this. What was the booting problem? I have no problems here in that regard. > I now know, there is a K8S (server?) version of that mobo, but at the time > it was all orderd, I wasn't aware of it - my thoughts are there there is > some sort of PCI/PCI-X problem with either the motherboard or the chipset, > and in all probability the K8S mobo will have the same chipsset and same > problems anyway... Right; very similar, no AGP but additional on-board scsi. > > Right now, (to test the PCI SATA cards in PCI-X slots), I have 4 x > dual-port SATA cards in a Dell PCI-X mobo connected to the 8 drives in > their box via 900mm SATA cables, and it's all running quite nicely. Read > performance on a RAID-0 array was 230MB/sec, write 300MB/sec (!?!), it > falls to 110MB/sec write and 140MB/sec read for RAID-6...) (Processor here > is a single Xeon 2.4GHz) I wonder if it's the onboard/pci combination that causes the problem on K8W... BTW There is a new K8W just out; pci express replaces agp and I think it supports dual core opterons (when they appear) so check it out before you place any big orders for the old one :) Andrew Walrond