1/4 inch cartridge tape drives & tar
MICHAEL A JENKINS
jenkinsm at uv4.eglin.af.mil
Thu Feb 9 10:56:55 AEST 1989
You can't use the r option of tar with cartridge tape tarfiles, BUT you
can use it with disk tarfiles. Simply copy the tarfile from the tape to
disk, add the new files, and copy the tarfile back to the tape. Here are
a couple of examples:
EXAMPLE 1: Tape contains a single tarfile.
mt -f /dev/rst0 rewind # rewind tape
cp /dev/rst0 disk.tar # get tarfile
tar rvf disk.tar filea fileb filec # add other files
cp disk.tar /dev/rst0 # put tarfile
EXAMPLE 2: Tape contains 5 files with file #3
being the tarfile of interest.
mt -f /dev/rst0 rewind # rewind tape
mt -f /dev/nrst0 fsf 2 # skip over first two files
cp /dev/rst0 disk.tar # get tarfile ...
# ... and the tape rewinds
tar rvf disk.tar filea fileb filec # add other files
mt -f /dev/nrst0 fsf 5 # skip to end of tape
cp disk.tar /dev/rst0 # put tarfile
It's as simple as cp! Hope this helps.
Michael A. Jenkins
ARPA: jenkinsm at eglin-vax.arpa
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