How vmphyinv mounts the media and reads the tape header

The following sequence of operations explains the mount process:

The vmphyinv utility contacts the NetBackup Volume Manager, vmd, on the local host or remote host depending on where the drive is attached.
The NetBackup Volume Manager starts a process, oprd.
The vmphyinv utility communicates with oprd and sends the mount request to oprd. After oprd receives the request, it issues a mount request to ltid.
The vmphyinv utility reads the tape header to determine the recorded media ID or globally unique identifier (GUID).
Note:
The default mount timeout is 15 minutes. Specify a different mount time by using the -mount_timeout option.