Make sure you run this command from the robot control host if in case the library is shared if its not then no issues.
Robot control host could be master or media server depending upon your configuration.
if you run this command from a non robot con...
Kindly check event id if any .
Run a robtest when there are no backups running and drive still shows down.
veritas\volmgr\bin\robtest
Choose the robot
Then try the command
s d (this will show you the available drive)
check the drive number which is...
If you are using Netbackup agent for EV then you dont have to put ev in backup mode manually.Netbackup EV agent will do it automatically.
The backup can be configured to backup the entire ev server .EV agent will backup the patitions where your data ...