Hi Kumar,
You need to check on /stand/system, whether the drivers already 'in' or not on your system. The drivers are stape & tape2.
Please add the drivers first into your system if you dont have this drivers on your system. And since the type of these drivers is static, you need to allocate system to shutdown.
If the drivers already on your system, you need to check the connection and the cable.
May I know your system model & the 'ioscan -nf' output?
Cheers,
AW
now working, next not working ... that's unix