From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gabor FUNK" Subject: Re: sata_sil24 stability and performance Date: Sun, 2 Mar 2008 10:39:29 +0100 Message-ID: <005d01c87c4c$0d01f550$4d0fa8c0@M2007> References: <20080219020916.GA29902@denix.org> <20080219043659.GA11936@jim.sh> <47BAF677.5000602@rtr.ca> <20080302061453.GA7291@denix.org> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Return-path: Received: from ns1.huweb.hu ([62.112.193.37]:52609 "EHLO ns1.huweb.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753351AbYCBJ7U (ORCPT ); Sun, 2 Mar 2008 04:59:20 -0500 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Denys Dmytriyenko , linux-ide@vger.kernel.org Cc: Jim Paris , Mark Lord , Tejun Heo I have/had a similar (hard resetting) problem (2+8 disks, kernel 2.6.24), see thread: http://www.mail-archive.com/linux-ide@vger.kernel.org/msg15950.html I tried replacing the PSU and also run the system with two 650W PSU-s, also failed. I also think that PSU shouldn't be the problem as I see they eat much less in operation than at spinup. Now I replaced the MB and it runs with a different Gigabyte MB with the 8 disk in SW RAID6 connected to the 2*4 on board SATA connectors (these now use 2+4*ata_piix and 2 ahci kernel drivers) and the 2 system disk is on an add-on Silicon Image SiI 3512 card. Since the problem is not seen immediately I can't tell whether it is better now. It is running cp 1 2, cp 2 3... to 2500 or so, with 1GB files then md5sums them, so far the problem not exhibiting. The 1st copy didn't finish in a day, so accidentally a second one got started (cron) and yesterday an "md: data-check" also started, so the system is quite busy now doing disk reads/writes... G. ----- Original Message ----- From: "Denys Dmytriyenko" To: Cc: "Jim Paris" ; "Mark Lord" Sent: Sunday, March 02, 2008 7:14 AM Subject: Re: sata_sil24 stability and performance > On Tue, Feb 19, 2008 at 10:32:07AM -0500, Mark Lord wrote: >> Jim Paris wrote: >>> .. >>> As you may have noticed on this list, power supplies are very >>> frequently a problem. >> .. >> >> Actually, no, I haven't noticed that. :) >> >> I do see them more frequently being suggested as a possible problem, >> and then after some time and expense on the part of the reporters >> it nearly always turns out to have been a device driver bug, >> or (less often) a firmware quirk of the device. >> >> Yes, PSUs are often suggested as a problem here, >> but only rarely has that been true. >> >> Especially nowadays, as PSUs are becoming much larger than >> they historically once were. > > Hi again. Thanks for your replies and sorry for bringing this up again. > I am still trying to resolve those 2 issues I mentioned in the first > email. While playing with different power options lately, I decided to > replace the PSU again for a single-rail Silencer 750 EPS12V, which is > rated at 60A (!) for a single 12V rail. Does anybody have any experience > with it? Can anyone suggest anything better? > > That is assuming the first issue with exceptions and resets is due to > the power being maxed out... > > Meanwhile I would still like to resolve the low performance issue with > SiI 3124, which shows only 17 MB/s write speed doing "dd if=/dev/zero", > while Intel ICH7 based PC writes at 44 MB/s sustained rate. I'd really > appreciate any ideas/suggestions towards solving this issue. Please let > me know if any other information is needed. I'm attaching the original > email with logs. Thanks in advance! > > -- > Denys >