The first thing you need to verify is your drive mapping is 100% correct - the ACSLS drive address has to correspond with the correct /dev/rmt device name.
When a dismount is required, NBU first issues an unload command to the O/S device name (mt -f /dev/rmt/
... rewoffl). Once the tape is in the unload posision, the command is sent to the ACSLS server to put the tape back in it's slot. If the tape is not unloaded, ACSLS will display a 'dismout failure' message.
To test, do the following:
1. mount a tape via the ACSSS user interface.
2. verify that the O/S sees the correct tape status : mt -f /dev/rmt/.... stat
3. issue O/S unload command : mt -f /dev/rmt/.... rewoffl
4. dismount the tape via ACSSS interface
If you're not familiar with ACSSS interface:
Logon to acsls server as user acsss
Home directory should be /export/home/acsss.
$ cd log (to access log files)
Important log files
acsss_stats.log and acsss_event.log
To open the command proc window:
$ cmd_proc -l
acsss >q dr all # query drive all
acsss >m A00000 0,0,10,0 # mount tape A00000 on drive 0,0,10,0
acsss >dism A00000 0,0,10,0 # dismount A00000 from drive 0,0,10,0
acsss >q vol A00000 # query status of volume A00000
acsss > display drive *,*,*,* -f type serial_num # get drive serial number
acsss >log # log off
$
