tape drive error
 

I am testing the new backup software , but now when I use the tar command to backup file to the tape , it pop the below message , could suggest what can I do ? I use DDS4 and RH7.2 system . Thx in advance.

/dev/tape: No medium found
mt: The device is offline (not powered on, no tape ?).

I also found the below error in /var/log/messages , could suggest what can I do except reboot the system ? thx.


kernel: st0: Write not multiple of tape block size.