Date: Mon, 6 Mar 2000 16:07:38 +0000 From: =?iso-8859-1?Q?Jos=E9_Monteiro?= <jm@sindigit.pt> To: Kim Shrier <kim@tinker.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: disk errors Message-ID: <20000306160736.B395@sindigit.pt> In-Reply-To: <38BF41FC.EF2C6F95@tinker.com>; from kim@tinker.com on Thu, Mar 02, 2000 at 10:39:24PM -0600 References: <38BE1EED.7D877256@tinker.com> <20000302092723.A19679@sindigit.pt> <38BF41FC.EF2C6F95@tinker.com>
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On Thu, Mar 02, 2000 at 10:39:24PM -0600, Kim Shrier wrote: > The consensus is that I am experiencing heat problems with the drive in > question. As a stop-gap solution, I am adding fans to the current > enclosure. The long term solution is to get a better enclosure with more > ventalation and fans. > following these and other sugestions i've received, i tried: - added extra fan near the drive - shortened the cable distance between the disk and the controller, trying to avoid near sources of elecromagnetic interference - lowered the transfer rate on the u2w bus to 40 and 20MB/s - connected the disk to the uw bus and forced the bus termination on the disk itself my crash test has been cp'ing a 200M file to another dir in the same filesystem, although these errors also appear randomly a couple of times per hour. the kernel messages invariably are: proxy /kernel: ahc0: Data Parity Error Detected during address or write data phase proxy /kernel: ahc0: Received a Master Abort -- <the disk freezes> proxy /kernel: swap_pager: indefinite wait buffer: device: 0x20409, blkno: 7488, size: 4096 proxy /kernel: swap_pager: indefinite wait buffer: device: 0x20409, blkno: 7488, size: 4096 proxy /kernel: (da1:ahc0:0:3:0): SCB 0x1d - timed out in dataout phase, SEQADDR == 0x5d proxy /kernel: (da1:ahc0:0:3:0): BDR message in message buffer proxy /kernel: (da1:ahc0:0:3:0): no longer in timeout, status = 353 proxy /kernel: Unexpected busfree. LASTPHASE == 0xa0 -- <the disk recovers> proxy /kernel: SEQADDR == 0x163 the disk and controller are detected as: ahc0: <Adaptec 2940 Ultra2 SCSI adapter> rev 0x00 int a irq 11 on pci0.17.0 ahc0: aic7890/91 Wide Channel A, SCSI Id=7, 16/255 SCBs da1 at ahc0 bus 0 target 3 lun 0 da1: <QUANTUM ATLAS IV 9 WLS 0A0A> Fixed Direct Access SCSI-3 device da1: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled da1: 8761MB (17942584 512 byte sectors: 255H 63S/T 1116C) i would like to have a definitive opinion about this before turning to the hardware supplier. tia, -- jose monteiro To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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