Date: Sun, 11 Sep 2005 22:33:47 +0200 From: Daniel Gerzo <danger@rulez.sk> To: Anthony Chavez <acc@anthonychavez.org> Cc: freebsd-stable@freebsd.org Subject: Re[2]: Stress testing and TIMEOUT - WRITE_DMA Message-ID: <1275346059.20050911223347@rulez.sk> In-Reply-To: <m2slwbqrxf.fsf@pegasos.local> References: <m2br3lt5nk.fsf@pegasos.local> <m2slwbqrxf.fsf@pegasos.local>
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This is a cryptographically signed message in MIME format. ------------3B1517534F5D5CB Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Hi Anthony, Sunday, September 11, 2005, 10:18:36 PM, you has on mind: > I'm not seeing much in the way of responses to this post from > freebsd-questions, so I thought I'd take it to freebsd-stable, where it > is probably more relevant. ;-) > Please see my original thread on freebsd-questions for context. > On Fri, 26 Aug 2005 03:21:35 -0600 Anthony Chavez <acc@anthonychavez.org>= wrote: >> My question is simply this: is the fact that I received 4 TIMEOUT >> warnings in the space of roughly 2 weeks significant cause for concern? > Apparently, the fact that the stress tool produced so few warnings may > have given me a false sense of security. I'm being treated to the > following messages (81 in total) today, after 8 days uptime: > Sep 6 11:35:27 mybox kernel: ad0: TIMEOUT - WRITE_DMA retrying (2 retrie= s left) LBA=3D8348191 > ... > Sep 6 18:59:09 mybox kernel: ad0: TIMEOUT - WRITE_DMA retrying (2 retrie= s left) LBA=3D8348383 > Sep 6 19:04:58 mybox kernel: ad0: TIMEOUT - READ_DMA retrying (2 retries= left) LBA=3D61749183 > The READ_DMA timeouts are happening very infrequently, but it's worth > mentioning that I'm seeing them now in addition. > This is quite disturbing, particularly when the machine in question is > *in*production.* I thing you should really quickly look for backuping your data. When I was seeing this kind of messages last time, my disk died after 3 days from time they started showing up in my log files. I wasn't able to write any data to the disk (system just sudennly paniced, when I tried to mount it rw, but I was able to mount it ro and copy most of the data) Note, that I wasn't able to copy about 10GB out of 30GB. So don't ignore them and have a good luck. > Has anyone who has experienced this pain found solace in 5-STABLE's ATA > drivers? > dmesg below. --=20 Best regards DanGer, ICQ: 261701668 | e-mail protecting at: http://www.2pu.net/ http://danger.rulez.sk | proxy list at: http://www.proxy-web.com/ | FreeBSD - The Power to Serve! [ I am not Mr. Tator! I am not the entertainment! - Dictator to Yakko ] ------------3B1517534F5D5CB--
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