Given:
# mt f /dev/rmt/1 status
What is the function of the command?

A.
The command is used to report the length of the tape.

B.
The command is used to check the status of the tape device.

C.
The command is used to check the checksum of the files on the tape.

D.
The command is used to check the time stamp on the files on the tape.

Explanation:

The mt command stands for Magnetic Tape Control. The f flag specifies the device (in this case the default tape device) and the status returns the status of the device.