Messages in this thread |  | | Date | Tue, 30 Oct 2001 23:25:43 +0000 | From | Richard Kettlewell <> | Subject | problem with ide-scsi and IDE tape drive |
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Hi,
I have a Seagate STT20000A IDE tape drive, which I am trying to use with the ide-scsi driver. It worked well enough when moving data around to repartition recently, but I have discovered a repeatable problem.
If I try and save a tar to the tape twice in succession, rewinding and reading forward to the same point each time first, the second attempt fails (details below).
I originally found this under 2.2.19, and upgraded to 2.4.13 to see if the problem was still there when running more recent code. It is.
Here is a script which demonstrates the problem for me:
#! /bin/sh set -e TAPE=/dev/nst0 hsize=512
set -x
mt -f $TAPE rewind echo "tape 1" | dd conv=sync of=$TAPE bs=$hsize count=1
for x in 1 2 3; do mt -f $TAPE rewind dd if=$TAPE of=/dev/null bs=$hsize date tar -c -b 20 -f $TAPE /boot done
Here's what the output looks like:
sfere# ./t + mt -f /dev/nst0 rewind + dd conv=sync of=/dev/nst0 bs=512 count=1 + echo 'tape 1' 0+1 records in 1+0 records out + mt -f /dev/nst0 rewind + dd if=/dev/nst0 of=/dev/null bs=512 1+0 records in 1+0 records out + date Tue Oct 30 23:15:01 GMT 2001 + tar -c -b 20 -f /dev/nst0 /boot tar: Removing leading `/' from absolute path names in the archive + mt -f /dev/nst0 rewind + dd if=/dev/nst0 of=/dev/null bs=512 1+0 records in 1+0 records out + date Tue Oct 30 23:15:36 GMT 2001 + tar -c -b 20 -f /dev/nst0 /boot tar: Removing leading `/' from absolute path names in the archive tar: Cannot write to /dev/nst0: I/O error tar: Error is not recoverable: exiting now
The behaviour is extremely consistent - the second invocation of tar always fails.
I rebuilt st.o and ide-scsi.o with the debugging macros enabled. The resulting kernel output is 80Kb long, and rather than fill everyone's inboxes I've put it at:
ftp://ftp.chiark.greenend.org.uk/users/richardk/tapelog.txt
Some possibly-relevant version numbers:
sfere# uname -a Linux sfere 2.4.13 #1 Sun Oct 28 12:13:17 GMT 2001 i586 unknown sfere# tar --version tar (GNU tar) 1.12
Copyright (C) 1988, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by John Gilmore and Jay Fenlason. sfere# mt --version GNU mt version 2.4.2
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