Date: Thu, 23 Apr 1998 13:33:04 +0800 From: Greg Lehey <grog@lemis.com> To: Karl Pielorz <kpielorz@tdx.co.uk>, Howard Goldstein <hgoldste@bbs.mpcs.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: SCSI tape prob 2.2.6R Message-ID: <19980423133304.40168@papillon.lemis.com> In-Reply-To: <353CB7DE.42C5E8F4@tdx.co.uk>; from Karl Pielorz on Tue, Apr 21, 1998 at 04:14:38PM %2B0100 References: <199804211506.LAA11316@bbs.mpcs.com> <353CB7DE.42C5E8F4@tdx.co.uk>
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On Tue, 21 April 1998 at 16:14:38 +0100, Karl Pielorz wrote: > Howard Goldstein wrote: >> >> I'm seeing these failures during attempts to read tarred stuff from an >> HP 1533A (surestore) with 'tar t'. Writes go through OK... >> >> Apr 21 10:52:42 cally /kernel: st0(ahc0:4:0): SCB 0x8 - timed out while idle, LASTPHASE == 0x1, SCSISIGI == 0x0 >> Apr 21 10:52:43 cally /kernel: SEQADDR = 0x5 SCSISEQ = 0x12 SSTAT0 =0x5 SSTAT1 = 0xa >> Apr 21 10:58:32 cally /kernel: st0(ahc0:4:0): MEDIUM ERROR info:0x2800 asc:11,0 Unrecovered read error > > Could be either cabling or... > >> My drive's orange light flashes after it's done this for a number of >> minutes (hardware error? OEM drive, no manual, all mention of the >> 1533 disappeared from HP's site) > > I think this means it needs the heads cleaning... ;-) All of these symptoms point to excessive read errors. When did you last clean the drive? You should do so whenever the LED starts flashing. That's not the only explanation, though. It could equally well be a problem with the tape. It's almost impossible to tell the difference except by deduction. > I also have a C1533A DAT in my system, running off a 2940 - and it works OK > - I don't have to muck around with densities or anything - I just write to > /dev/nrst0 etc. with Dump - and restores work fine... > > The medium error would also suggest a problem with the tape / heads. The > drive 'backing up' and trying again is yet another symptom of either poor > tapes, clogged / dirty heads - I'd try cleaning them first, but check the > cabling while you do... ;-) I don't think it's the cabling. Greg To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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