Dan Horth wrote:

> now - as I said I have S6 set to off - so DDS pass through is disabled,
> DDS-DC is enalbed, but the tape still wont go beyond 12Gb.
> 
> So I guessed that somewhere a "disable DDS-DC" command is being sent -
> although I have not been able to track down how to change this.
> 
> I have been using bru, tar and mt to contorl the tape drive.

Dan,

Be sure to check your /etc/brutab file.  By default, the brutab file has
an EXAMPLE device that is set up for a 12GB DDS-3 drive.  Only, the size
is set to 12GT.  This means that BRU will always stop writing at 12G,
prompting for a new volume (or running the mountcmd and unmountcmd
scripts).  To make sure that BRU uses the entire tape, set size=0 in
that device entry (or override the size with a '-s 0' on the BRU command
line).

Our internal DDS-3 setup is as follows:

#####################################################
# DDS 3 Drive using 125 meter, 12GB native tapes
#    NOTE - set size=0 to allow BRU to write to 
#           end of tape with compression.
#####################################################

/dev/st0  \
      devname="DDS 3, 12GB + Compression, rewind" \
      size=0  bufsize=32k  seek=0 \
      rawtape  tape  shmcopy  rewind  autoscan \
      shmseg=10 shmmax=128k shmall=2048k

/dev/nst0  \
      devname="DDS 3, 12GB, norewind" \
      size=0  bufsize=32k  seek=0 \
      rawtape  tape  shmcopy  norewind  noautoscan \
      shmseg=10 shmmax=128k shmall=2048k \
      eodcmd="mt -f /dev/nst0 eod" \
      rfmcmd="mt -f /dev/nst0 fsf 1" \
      bfmcmd="mt -f /dev/nst0 bsfm 2" \
      retencmd="mt -f /dev/st0 retension" \
      rewindcmd="mt -f /dev/st0 rewind"

Sorry about the confusion.
      
-- 
Tim Jones                               [EMAIL PROTECTED]
Vice President                          Visit our tape backup web pages:
Enhanced Software Technologies, Inc.    http://www.estinc.com/

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