Re: SCSI tape drive and compression
On Monday 12 November 2001 05:01 pm, Philippe Troin wrote:
> Martin Sanborn <marty@delirium.cqe.nwu.edu> writes:
> > How do I turn on the data compression? The mt man page indicates that
> >
> > mt -f /dev/tapes/tape0/mtn datcompression [x]
>
> mt datcompression 1 (default) reports the current state
> mt datcompression 0 turns it off
> mt datcompression 2 turns it on
Unfortunately, the command mt -f [device] datcompression 2 returns
Compression off.
Compression capable.
Decompression capable.
I retried dump again just in case it wasn't reporting the compression as on,
but still the same behavior (a little less than 4GB on the tape).
> You might also want to investigate the mt-st package which should give
> you more control on SCSI tape behavior.
That one doesn't want to talk to me. I installed it, and I used the command
"mt-st -f [device] defcompression". While the tape spins, when it stops it
returns nothing. I tried appending a 0,1, or 2 to the end of the command, but
it still returns nothing.
Again, I tried dump after using the "mt-st defcompression 2" command, and the
result is still the same. Puzzling.
Marty Sanborn
--
| Martin Sanborn - Dept. of Chemical Engineering - Northwestern University |
| m-sanborn@nwu.edu - (847)467-1653 - http://zeolites.cqe.nwu.edu/marty |
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