From: Marcus Meissner (meissner_at_suse.de)
Date: Thu Nov 23 2006 - 10:31:26 CET
Date: Thu, 23 Nov 2006 10:31:26 +0100 From: Marcus Meissner <meissner@suse.de> Message-ID: <20061123093126.GA15432@suse.de> Subject: Re: [suse-sles-e] is mt a bit broken on SLES10?
On Thu, Nov 23, 2006 at 09:28:35AM +0100, Heiko Helmle wrote:
> 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?
Can you check what it does with strace?
Ciao, Marcus
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