I just want to re-cover my tape drives. both are attached but for unknown reason, the system couldn't use it.

root@ola: /dev/ntape>hwmgr -show scsi

        SCSI                DEVICE    DEVICE  DRIVER NUM  DEVICE FIRST
 HWID:  DEVICEID HOSTNAME   TYPE      SUBTYPE OWNER  PATH FILE   VALID PATH
-------------------------------------------------------------------------
   62:  0        ola disk      none    2      1    dsk0   [0/0/0]
   63:  2        ola cdrom     none    0      1    cdrom0 [3/0/0]
   64:  1        ola tape      none    0      1    (null)
   65:  3        ola tape      none    0      1    (null)
   66:  4        ola disk      none    2      1    dsk1   [7/0/0]
   71:  7        oladisk      none    2      1    dsk4   [7/0/3]

thanks in-advance.

Here is a brief extract from my notes:

Check special device files exist and can "see" the tape drives (these should be created automatically)
   ls -al /dev/ntape/t*
   file /dev/ntape/tape?
   (NB check SCSI and LUN information is returned)

Scan and show the SCSI bus
   hwmgr -scan scsi
   hwmgr -show scsi [-full]
   (NB optional -full will show devices with "stale" paths

Delete devices with "stale" paths
   hwmgr -delete component-id <HWID-number>

Other useful show commands
   hwmgr -view devices
   hwmgr -view hierarchy


I hope that helps

Mike

i appreciate your help mike. i was able to cleanup "stale path".

the tape drives are still NOT showing up. usually, it's /dev/ntape/tape1 or /dev/ntape/tap2 for drive 1 and 2, respectively.

the system is telling me - no such device.

do i need to re-configure my system to scan and include attached device?

Have any hardware changes occured ?  Is it possible their SCSI IDs have changed or be the same ? (Due to the replacement of a faulty drive).  How about removing one tape drive to see whether the other one can be 'seen' by the system.  The old scu commands from V4.0x days still work, so please try:
   scu scan edt
   scu show edt

and post the relevant part of the output.
Also make sure the special devices files are present with:
   ls -lL /dev/ntape
   ls -lL /dev/tape

and post the set(s) of devices present, (eg tape0 [_d0 to _d7] and tape1 [_d0 to _d7])

From memory you shouldn't need to re-configure the system (rebuild the kernel), provided the system hardware hasn't changed.

Just a thought, were the tape drives powered on and connect to the system via SCSI cables when the system was booted ?

I hope that helps.

Mike