Trouble with 'tar', tape archiver.

[Cedric Ramsey]

Hello. I am running ESIX a unix sys V compatible os. I've been
trying to backup a directory, /mnt/code, using tar. I want to
do the backups to floppy disk. I used the following command:
$tar cevfk /dev/rdsk/f0q15d 1200 /mnt/code
This will backup all files an subdirectories but when I get close
to the last file I get 'tar read tape error'. Also, the tar does 
prompt me to put in the floppies when needed. and the directory
/mnt/code has sub directories too. Can anybody help me?

PS: I am a superuser with all the privelidges.

Thankyou,

Cedric A. Ramsey