basic tape and tar commands to copy files to the kuiper DDS4 dat drive 
when you're logged onto kuiper:

at a linux prompt:  (in an iraf window, type "csh" to get a linux prompt)

  cd to the directory containing the files to be written to tape
   mt -f /dev/st0 rewind      ; rewind tape
 ( mt -f /dev/nst0 fsf <n>    ; skip first n savesets if tape already contains
                                  one or more savesets; do not rewind )
   tar cvf /dev/nst0 .        ; copy everything in current directory tree 
                                  (including all subdirs) to tape; do not rewind

  cd to the next directory containing files to be written in a subsequent saveset
   tar cvf /dev/nst0 .        ;  copy next set of files
   mt -f /dev/nst0 offline    ; rewind and eject

to list data that is on a tape:

   mt -f /dev/st0 rewind
 ( mt -f /dev/nst0 fsf <n>    ; skip first n savesets )
   tar tvf /dev/st0           ; list contents of next saveset and rewind

to extract data from a tape onto disk:

   cd to the disk directory where the files are to be written
   mt -f /dev/st0 rewind
 ( mt -f /dev/nst0 fsf <n>    ; skip first n savesets; do not rewind )
   tar xvf /dev/st0           ; extract all files in next saveset and write them
                                  to disk, then rewind