Date: Sun, 2 May 1999 21:32:37 +0200 (MET) From: Martin Kraft <kraft@hpcs14.dv.fal.de> To: mjacob@feral.com Cc: freebsd-scsi@freebsd.org Subject: Re: i/o error with larger QIC Message-ID: <199905021932.VAA21296@hpcs14.dv.fal.de> In-Reply-To: <Pine.LNX.4.04.9904171445340.13156-100000@feral-gw> from "Matthew Jacob" at Apr 17, 99 02:48:52 pm
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Sorry for the delay! Matthew Jacob wrote: > > > Hello Matthew and Stefan, > > > > thanks for your assistance! > > > > Stefan Huerter wrote: > > > > > > Try: > > > mt blocksize 0 > > > This should work for you, too. I hope so :-) > > > > What's that?!?!?! > > > > I typed "mt blocksize 0", and -- the first time -- I could tar -t and > > tar -x a file from my old DC 6525. Great! So far :-( > > > > I extracted a small file close to the beginning of the tape. It took > > just a few seconds (as usual) and the file was on my disk. > > > > But after that, the tape didn't rewind and stop, as it did in former time, > > it now is rewinding forwards and backwards since more than 30 minutes. > > This is what I'm worried about. If you're in *variable* mode, the drive is > faking it. QIC is a fixed block format. If you set it to variable mode, > I think it tries to guess the block layout, and it sounds like it's having > a rough go of it. > > > > > What a surprise > > > > Martin Kraft > > > > > > P.S. 35 minutes. Just another turn. I will kill the tar process, because > > I don't have a fire extinguisher at home ... Very strange ... > > > > Do you remember what blocksize you *wrote* these tapes with? If you do, > set the blocksize for the drive fixed at that size and try read with the > tar command (setting to the blocksize you used to write the tape). I > really wish I had manuals for this drive so I could try and figure what > they're trying to do. I don't know; I just used "tar -c" under 2.2.7. I try 10240: su-2.02# tar -t tar: read error on /dev/rsa0 : Input/output error su-2.02# mt blocksize 10240 su-2.02# tar -t ./ bin/ bin/cat bin/chio bin/chmod bin/cp bin/csh bin/date bin/dd bin/df bin/domainname bin/echo bin/expr bin/hostname bin/kill bin/ln ^C su-2.02# pwd /root su-2.02# mkdir mist su-2.02# cd mist su-2.02# tar -x bin/* But without succes: the drive is now rewinding forward and backward every thre seconds and no extracted file appears on the disk. I am not able to break the process with kill or even kill -9. Seems to be an autonomous operatione of the drive. I would like to add another fact to my previous description. Even with 150 MB tapes written under 2.2.7, after correctly extracting the desired files, the drive goes to wind the tape forward and backward infintitely. Martin Kraft To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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