Date: Thu, 9 Mar 2000 20:38:47 -0800 (PST) From: Doug White <dwhite@resnet.uoregon.edu> To: =?iso-8859-1?Q?Jos=E9_Monteiro?= <jm@sindigit.pt> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: ahc0 errors Message-ID: <Pine.BSF.4.21.0003092037530.48297-100000@resnet.uoregon.edu> In-Reply-To: <20000309141136.A23000@sindigit.pt>
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Reply below .. saving detail On Thu, 9 Mar 2000, [iso-8859-1] José Monteiro wrote: > i've been experiencing several problems with an adaptec 2940u2w. > > 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) > > 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 > 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 > proxy /kernel: SEQADDR == 0x163 > > i already 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 usually appear randomly a couple of times per > hour. These stills smell like bad termination. Triple check it against the manuals and the drive jumper settings, and try replacing the cable if you haven't already. It may be a bum drive. Doug White | FreeBSD: The Power to Serve dwhite@resnet.uoregon.edu | www.FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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