[suse-sles-e] is mt a bit broken on SLES10?

From: Heiko Helmle (heiko.helmle_at_head.de)
Date: Thu Nov 23 2006 - 09:28:35 CET


Message-ID: <45655BB3.5070401@head.de>
Date: Thu, 23 Nov 2006 09:28:35 +0100
From: Heiko Helmle <heiko.helmle@head.de>
Subject: [suse-sles-e] is mt a bit broken on SLES10?

Hello,

I'm still playing around with SLES10 and found a strange thing with mt
and tape drives.

naturally when using DLT with 'tar -z' I want hardware compression
turned off.

so i check it with mt:

~ # mt -f /dev/nst0 datcompression
Compression on.

That's not good... please turn it off

~ # mt -f /dev/nst0 datcompression 0
Compression on.

hmm.... that's not good at all... (well i tried this and a few other
things about 50 times and didn't manage to turn of hw-compression until
i copied a mt-binary off an old SLES9-vm (put in the local path (the './'):

~ # ./mt -f /dev/nst0 datcompression
Compression on.
~ # ./mt -f /dev/nst0 datcompression 0
Compression off.

and the stock SLES10 mt shows it right now
~ # mt -f /dev/nst0 datcompression
Compression off.

but can't turn it on again. (SLES9's mt can!)

So SLES10-mt is apparently not able to manipulate my DLT's hardware
compression...
both come from cpio, but different versions:
~ # ./mt --version
GNU mt version 2.5 (working)
~ # mt --version
mt (GNU cpio 2.6) (broken)

Did anybody else stumble on this or is this a problem local to my
test-installation?

Regards
        Heiko Helmle

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