Then its good. Now one other question is, did you get to check the man pages of tar, if not I would advice you to check that

here is an option from man pages of tar:

k size
Requires tar to use the size argument as the size of
an archive in kilobytes. This is useful when the
archive is intended for a fixed size device such as
floppy disks. Large files are then split across
volumes if they do not fit in the specified size.


One other thing is that tar is not tollerent with the tape errors. It also would expand holes in files. I would suggest that you venture on using dump, which again similar to tar and much versatile.

Sam