fsf and bfs showing different output

Question

I am using mt utility to write a data on LTO 5,Data stored at sequentially on the tape and file will be identified by File 1, 2 ,3 I want to read the file 3 for that I am using fsf and bsf but I am confused.

If I run mt -f /dev/nst0 fsf 1 then its goes to next file but how can I traverse directly to file no 3 , Its confusing me.

Answer 1

Please see the image below:

As you can see here, you can go to the beginning of the file no 3 with:

$ mt -f /dev/st0 fsf 2

NOTE that you need to rewind tape before this command.

Also, as Mark has already suggested, you can use:

$ mt -f /dev/st0 asf 2

asf is equivalent to rewind + fsf.