Hello!
I have a SCSI-2 DDS2 Tape drive and got several issues when trying to
use compression (gzip, bzip2) on backups.
Here you can see a sample session:
[EMAIL PROTECTED] test2]# ls -lah
total 20K
drwxr-xr-x 2 root root 4.0K Sep 7 12:00 .
drwxr-xr-x 4 root root 4.0K Sep 7 11:08 ..
-rw-r--r-- 1 root root 41 Sep 7 12:00 IDENTITY
-rw-r--r-- 1 root root 12 Sep 7 11:07 NAME
-rw-r--r-- 1 root root 30 Sep 7 11:07 TIMESTAMP
[EMAIL PROTECTED] test2]# cat *
2bc53e31a3ae13a7ac4256d9132dfd2215398dc6
Testtape #1
Wed Sep 7 11:07:31 CEST 2005
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# mt status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x24 (DDS-2).
Soft error count since last status=0
General status bits on (41010000):
BOT ONLINE IM_REP_EN
[EMAIL PROTECTED] test2]# mt tell
At block 0.
[EMAIL PROTECTED] test2]# tar cvf /dev/nst0 *
IDENTITY
NAME
TIMESTAMP
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# tar xvf /dev/nst0
IDENTITY
NAME
TIMESTAMP
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# tar czvf /dev/nst0 *
IDENTITY
NAME
TIMESTAMP
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# tar xzfv /dev/nst0
IDENTITY
NAME
TIMESTAMP
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# tar xvf /dev/nst0
gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error exit delayed from previous errors
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# tar cjvf /dev/nst0 *
IDENTITY
NAME
TIMESTAMP
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# tar xjvf /dev/nst0
bzip2: (stdin): trailing garbage after EOF ignored
IDENTITY
NAME
TIMESTAMP
[EMAIL PROTECTED] test2]# mt rewind
[EMAIL PROTECTED] test2]# tar xvf /dev/nst0
bzip2: Compressed file ends unexpectedly;
perhaps it is corrupted? *Possible* reason follows.
bzip2: Invalid argument
Input file = (stdin), output file = (stdout)
It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.
You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.
tar: Child returned status 2
tar: Error exit delayed from previous errors
[EMAIL PROTECTED] test2]# tar --version
tar (GNU tar) 1.15.1
When I do not use compression all works fine so I think it's not a
kernel/driver/device issue.
I hope this helps you to help me and lots of other people.
thx in advance
Michael Postmann
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