Tape drive respond strangely

[Shun Kong Gilbert Wong]

A SDLT NSR is giving me problem.
Commands like
mt -f /dev/ntape/tape0_d1 rewind or
vrestore -xf /dev/ntape/tape0_d1 -D /xxx
did not do anything. Needed a "Ctrl+C" to get out.
When the same commands were issued from another system to this SDLT, the tape unit seemed to be working fine.
The OS are 5.1b plus patch kit 2 on both systems.

[Johan Brusche]

Simultaneous access from 2 non-coordinating systems to the same tape device never is a good idea.
Have you tried changing the mapping on the NSR to give the system that needs to do the vrestore exclusive access to the tape-drive ?

__ Johan.

[Mohamed K Ahmed]

Did you try to see if the tape drive is seen by the system by issung the command
# hwmgr -view dev

May be also you can try cleaning the hardware device list.

Mohamed