Date: Thu, 16 Feb 2006 20:10:31 +0000 From: "V.I.Victor" <idmc_vivr@intgdev.com> To: freebsd-questions@freebsd.org Subject: Every 12-hrs -- "ad0: TIMEOUT - WRITE DMA" Message-ID: <W204334961192261140120631@webmail15>
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For the last 4-days, our (otherwise OK) 5.4-RELEASE machine has been reporting: Feb 12 12:08:05 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=2701279 Feb 13 00:08:51 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=2701279 Feb 13 12:09:38 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=2963331 Feb 14 00:10:24 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=2705947 Feb 14 12:11:09 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=2706335 Feb 15 00:12:02 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=2832383 Feb 15 12:12:57 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=139839 Feb 16 00:13:50 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=131391 Feb 16 12:14:36 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=131391 The system was created Jan 08 and, prior to the above, the ad0: timeout had only been reported twice: Jan 25 11:43:34 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=17920255 Feb 6 11:59:42 : ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=2832383 Before to asking here, I did several searches for possible causes. I think I've eliminated disk spin-down and bad-block-mapping -- just before the Feb 15, 12:12 period a 2-gig file was created; leaving the disk 'spinning' and bad-blocks presumably bypassed. Another found item said that some IBM drives recalibrate every 25-hours. Interesting concept, but a different period and without previous history. Lastly, several items referred to changing PREEMPTION but never seemed to reach a final conclusion. I also checked the cron log and found nothing running at the timeout times. So -- can anyone help track this down? Final note: the hardware is an old, resurrected Win98 machine running 24/7 and is used only for email processing. I installed it primarily as a proof of concept, so it can be replaced if necessary. Some specifics: FreeBSD 5.4-RELEASE #0: Sun May 8 10:21:06 UTC 2005 CPU: AMD-K7(tm) Processor (598.84-MHz 686-class CPU) Origin = "AuthenticAMD" Id = 0x612 Stepping = 2 Features=0x81f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,MMX> AMD Features=0xc0400000<AMIE,DSP,3DNow!> real memory = 134152192 (127 MB) avail memory = 121630720 (115 MB) ACPI disabled by blacklist. Contact your BIOS vendor. ad0: 14664MB <IBM-DJNA-351520/J56OA30K> [29795/16/63] at ata0-master UDMA66 acd0: CDROM <CREATIVE CD5233E/C2.05> at ata1-master PIO4 Thanks for any help!
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