mt command error using /dev/rmt0

[Guest_imported]

Hi,

i am running AIX 4.3 with a SCSI-Streamer (DAT) attached. I want to use the "mt" command for rewinding the tapes.

Example: mt -f /dev/rmt0 rewind

But after this command nothing happens and after some minutes an error "A system call received an invalid parameter" comes up. Any ideas ???

 

[DSMARWAY]

Do you get anything in error report ?
Do you get the same if you run tctl -f /dev/rmt0 rewind

 

[Guest_imported]

Yes, the same error comes up if i use "tctl -f /dev/rmt0 rewind". I also get this error if i use tar -cvf /dev/rmt0 /home/* for example.

How can i view the error report you mentioned ?

 

[DSMARWAY]

to view error report do

errpt -a | pg

( have alook for rmt0 errors / tape errors)
Has this tape drive ever worked ?
do lsdev -C | grep rmt ( does it show the tape drive as available) see if you can open the device i.e. do
< /dev/rmt0 ( should come back to the # prompt
if it hangs , could be problem with the tape drive, cable