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Tape problem

daemon@ATHENA.MIT.EDU (Tekno Soft Snc)
Wed Nov 18 07:45:34 1998

To: linux-scsi@vger.rutgers.edu
Date: 	Tue, 17 Nov 98 22:23:21 CET
From: Tekno Soft Snc <teknosoft@mclink.it>

Hi All,

I need help to restore a tar backup from a tape that have some
broken blocks :-(((!!!! The box is a Linux 2.0.35 with AHA2940UW
and the tape is a TANDBERG model TDC 4100 Rev: =07. The cartrige
have 1,2Gb of capacity (950 ft. = 289,56mt). I've tried with some
variant of:

tar --ignore-zeros --ignore-failed-read -xvf /dev/st0

or

dd if=/dev/st0 of=tapedump conv=noerrors count=2000000
dd if=/dev/st0 of=tapedump skip=1056024 conv=noerrors count=2000000
                                ^---- Start of broken blocks
                                      reported by other dd's

but without lock. The tape report:

st0: Error with sense data: Current error st09:00: sense 
key Medium Error
Additional sense indicates Read retries exhausted

and so on. I hope that some one reply me how to rescue this very
important data.

Thanks,

Roberto.

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