ad0: WRITE command timeout tag=0 serv=0 - resetting

John Kennedy warlock at jk.homeunix.net
Mon Aug 25 19:43:33 PDT 2003


I'm seeing some resets on my ad0 drive.  I tend to cvsup my kernel, recompile
and reboot so the only clue I have to the version I'm running is the date that
the kernel was compiled as it shows up when I rebooted.

I stripped out a few reboots if there was no change in kernel rev or errors.

It isn't necessarily a heavy-use CPU all the time, but I've obviously done
some full compiles (make buildworld, plus the kernels).

Initially I was thinking that this must have crept in around 8/23, but looking
back through my logs I see another write timeout on 8/19.

All the hits today took place during lots of I/O (mostly buildworld with some
of the larger ports like X).  I'll do some more I/O and see if I can find
anything that triggers it reliably.

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[grep -e 'ad0:' -e 'done$' -e 'kernel: FreeBSD']
Jul 22 21:24:28 pandora /kernel: FreeBSD 4.8-RELEASE #0: Thu Apr  3 10:53:38 GMT 2003
Jul 22 21:24:28 pandora /kernel: ad0: DMA limited to UDMA33, non-ATA66 cable or device
Jul 22 21:24:28 pandora /kernel: ad0: 9736MB <Maxtor 91020U3> [19783/16/63] at ata0-master UDMA33
...
Aug 18 21:34:22 pandora /kernel: FreeBSD 4.8-STABLE #0: Mon Aug 18 21:20:49 PDT 2003
Aug 18 21:34:22 pandora /kernel: ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 18 21:34:22 pandora /kernel: ad0: 9736MB <Maxtor 91020U3> [19783/16/63] at ata0-master UDMA33
Aug 19 20:22:19 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 19 20:22:19 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 19 20:22:19 pandora /kernel: done
...
Aug 23 14:05:59 pandora /kernel: FreeBSD 4.8-STABLE #1: Sat Aug 23 13:53:24 PDT 2003
Aug 23 14:05:59 pandora /kernel: ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 23 14:05:59 pandora /kernel: ad0: 9736MB <Maxtor 91020U3> [19783/16/63] at ata0-master UDMA33
...
Aug 23 20:03:06 pandora /kernel: FreeBSD 4.8-STABLE #1: Sat Aug 23 13:53:24 PDT 2003
Aug 23 20:03:06 pandora /kernel: ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 23 20:03:06 pandora /kernel: ad0: 9736MB <Maxtor 91020U3> [19783/16/63] at ata0-master UDMA33
Aug 25 07:54:51 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 25 07:54:52 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 07:54:52 pandora /kernel: done
Aug 25 09:03:03 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 25 09:03:03 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 09:03:03 pandora /kernel: done
Aug 25 09:03:33 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 25 09:03:34 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 09:03:34 pandora /kernel: done
Aug 25 09:05:24 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 25 09:05:24 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 09:05:24 pandora /kernel: done
Aug 25 09:05:47 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 25 09:05:47 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 09:05:47 pandora /kernel: done
Aug 25 09:09:07 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 25 09:09:07 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 09:09:07 pandora /kernel: done
Aug 25 14:16:02 pandora /kernel: ad0: WRITE command timeout tag=0 serv=0 - resetting
Aug 25 14:16:02 pandora /kernel: ata0: resetting devices .. ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 14:16:04 pandora /kernel: done
Aug 25 17:40:44 pandora /kernel: FreeBSD 4.9-PRERELEASE #2: Mon Aug 25 17:34:08 PDT 2003
Aug 25 17:40:44 pandora /kernel: ad0: DMA limited to UDMA33, non-ATA66 cable or device
Aug 25 17:40:44 pandora /kernel: ad0: 9736MB <Maxtor 91020U3> [19783/16/63] at ata0-master UDMA33


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