NBU 7.7.3
so due to space issues still, the Oracle backup of last night i changed the SLP to do the backup directly to tape. works fine.
but when i'm monitoring the tape usage from the GUI console, i noticed that one of the tape drives is idle. backup is still going on though.
why does this tape drive remained idle for some hours and how does SLP decide/use when to use a tape drive?
Do you have sufficient jobs being generated for 2 drives?
What does STU config look like? (# drives and MPX setting)
And Policy attributes and schedule? Does it generate multiple jobs?
See if this TN helps:
Example of using multiplexing with schedules
http://www.veritas.com/docs/000112020
This raises an issue where some planning on your part can really help - when you set up tape drives
NetBackup will read them sequentially by default. ( you can set up storage groups to round robin, or prioritize, etc ), but within one storage unit, NetBackup reads them in sequence.
If you plan your interface/drive combo, you can name the drives so that as jobs run, the load is spread across the interfaces, whether FC or TCP/IP.
For example, I have data domain drives, using two FC interfaces for one client - I named the first interface drives using even numbers, and the second with odd ones, so as netbackup selected drive20 it used one path, drive21 uses a different path, so on.
Likely, this has nothing to do with your issue, but it is something to think about in designing your drive/names.
