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RE Compression usage
2006-07-04 08:17:07
owner-amanda-users AT amanda DOT org a écrit sur 04/07/2006
13:17:46 :
>
> Dear all,
>
> I just want to clarify something about compression:
>
> My understanding is that you can use either software or hardware
> compression, or can switch between the two if needed.
>
> What is generally, in your experience, the best of the two to use?
>
> To switch off hardware compression, I believe I should use:
> mt -f /dev/nst0 compression 0
>
> Does this command switch it off permanently until you use the following?:
> mt -f /dev/nst0 compression 1
>
> or will hardware compression switch back on, say, after a reboot?
AFAIK, there's another option.
from "mt" man pages:
defcompression
(SCSI tapes) Set the default compression state. The
value -1
disables the default compression. The compression state
set by
compression overrides the default until a new tape is inserted.
Allowed only for the superuser.
so one should use:
mt -f /dev/nst0 defcompression 0
Cyrille
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