hi,
1. i'm a beginner user for unix. i want to learn that how can i learn disk usage of tape device?
2. How can i remove a file or directory from the tape device??

Thanks, regards...

Using tar...

1) use the -t and -v options and it will report a
list of all files on the tape and the total
number of blocks used. You will have to
translate that into bytes base on the block
size.

2) use the -x option to extract files from tape.
If you name the specific directory you are
interested in extracting, you should get all
the files under that particular directory.

Read through the man page carefully for your
specific "tar" (they are pretty much all the same
but some have minor differences).