From owner-freebsd-questions Thu Apr 23 02:55:02 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id CAA07347 for freebsd-questions-outgoing; Thu, 23 Apr 1998 02:55:02 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from freebie.lemis.com (freebie.lemis.com [139.130.136.133]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id CAA07336 for ; Thu, 23 Apr 1998 02:54:57 -0700 (PDT) (envelope-from grog@lemis.com) Received: from papillon.lemis.com ([192.122.138.250]) by freebie.lemis.com (8.8.8/8.8.7) with ESMTP id TAA27136; Thu, 23 Apr 1998 19:24:44 +0930 (CST) (envelope-from grog@lemis.com) Received: (grog@localhost) by papillon.lemis.com (8.8.8/8.6.12) id NAA00594; Thu, 23 Apr 1998 13:33:05 +0800 (SGT) Message-ID: <19980423133304.40168@papillon.lemis.com> Date: Thu, 23 Apr 1998 13:33:04 +0800 From: Greg Lehey To: Karl Pielorz , Howard Goldstein Cc: freebsd-questions@FreeBSD.ORG Subject: Re: SCSI tape prob 2.2.6R References: <199804211506.LAA11316@bbs.mpcs.com> <353CB7DE.42C5E8F4@tdx.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.89i In-Reply-To: <353CB7DE.42C5E8F4@tdx.co.uk>; from Karl Pielorz on Tue, Apr 21, 1998 at 04:14:38PM +0100 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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