Date: Sat, 25 Apr 1998 12:30:40 -0400 From: Howard Goldstein <hgoldste@bbs.mpcs.com> To: Greg Lehey <grog@lemis.com> Cc: Karl Pielorz <kpielorz@tdx.co.uk>, freebsd-questions@FreeBSD.ORG Subject: Re: SCSI tape prob 2.2.6R Message-ID: <199804251630.MAA06019@penny.n2wx.ampr.org> In-Reply-To: <19980423133304.40168@papillon.lemis.com> References: <199804211506.LAA11316@bbs.mpcs.com> <353CB7DE.42C5E8F4@tdx.co.uk> <19980423133304.40168@papillon.lemis.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Greg Lehey writes: > 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. There was one other but less scientific and more hearsay way....Dejanews reveals a number of instances of this problem that all point back to a drive flaw, namely a known incompatibility of the 1533A with non-HP 120M tapes. After about 20 hours of struggling with these (Maxell 120M DDS2) I dropped in the one 90M tape I had for initial testing and wham, not a single glitch reading a backup made almost a year ago, and subsequent read/write cycles on that tape work great. As an aside I tried many possible cable configs, termination options to no avail, head cleaning both with tape and careful manual cleaning. So it >seems< a *(#%$%# drive+media combo. Kick me in the head and call me sally for loss of two days productive work. arrrgh (Did HP go downhill after they stopped making the 16C? I wonder...) Thank you for your advice and support [[as an aside does anyone have any thoughts about coercing these 120M tapes to be treated as 90M tapes? I wonder if the lower density will let me get something useful out of this box I bought, or if the attempt isn't worth persuing]] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199804251630.MAA06019>