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Date:      Tue, 21 Apr 1998 16:14:38 +0100
From:      Karl Pielorz <kpielorz@tdx.co.uk>
To:        Howard Goldstein <hgoldste@bbs.mpcs.com>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: SCSI tape prob 2.2.6R
Message-ID:  <353CB7DE.42C5E8F4@tdx.co.uk>
References:  <199804211506.LAA11316@bbs.mpcs.com>

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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... ;-)

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... ;-)

Regards,

Karl Pielorz

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