Re: [SLE] SCSI Tape compression

From: Ken Schneider (suse-list_at_bout-tyme.net)
Date: 08/09/05

  • Next message: Bruce Marshall: "Re: [SLE] SCSI Tape compression" 
    To: suse-linux-e@suse.com
Date: Tue, 09 Aug 2005 12:49:36 -0400

    On Tue, 2005-08-09 at 13:31 -0300, Sebastian Jeremias wrote:
    > Hi,
    > I'm having troubles compressing a DDS-4 tape. I have an HP C5683A drive,
    > and when I do 'mt -f /dev/nst0 status' (or mtst) I get:
    >
    > twist:/opt/ltt # mtst -f /dev/nst0 status
    > SCSI 2 tape drive:
    > File number=0, block number=0, partition=0.
    > Tape block size 0 bytes. Density code 0x8c (EXB-8505 compressed).
    > Soft error count since last status=0
    > General status bits on (41010000):
    > BOT ONLINE IM_REP_EN
    >
    > The problem is that it's not using compression, although it's turned on.
    > My questions are:
    > - Is EXB-8505 the right compression mode? I read you could change it to
    > DDS-4, but what's the compression code for DDS-4?
    > - Do I need a hardware specific driver for the SCSI controller for the
    > O.S. to recognize the tape in the proper way?
    > - Something I'm missing?
    >
    > Thanks in advance,
    > Sebastian
    Try this command instead:

    mt -f /dev/st0 datcompression

    to see the status of compression. Use mt -f /dev/st0 datcompression 2 to
    turn it on. 

    -- 
Ken Schneider
UNIX  since 1989, linux since 1994, SuSE  since 1998
 "The day Microsoft makes something that doesn't suck is probably
  the day they start making vacuum cleaners." -Ernst Jan Plugge
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  • Next message: Bruce Marshall: "Re: [SLE] SCSI Tape compression"

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