device target streams is the right thing to change - 2 is probably right...
although you need to make sure you have enough bandwidth from your client to
keep both drives spinning or it will end up taking longer.
-----Original Message-----
From: Legato NetWorker discussion
[mailto:NETWORKER AT listserv.temple DOT edu]On Behalf Of William M. Fennell
Sent: Wednesday, 26 October 2005 6:41 AM
To: NETWORKER AT listserv.temple DOT edu
Subject: [Networker] Best usage of tape drives
Hi folks,
I have a Server with three tape drives hooked up to it.
I have a dedicated storage node with two tape drives hooked up to it.
All drives are in a qualstar TLS-4000 and the tape drives are Sony
700CDX AIT-3.
We're running Solaris 8 on the Networker server and 9 on the storage node.
We're at Networker 7.1.
My storage node can of course only write local data to tape.
My issue is that it only uses one drive! So it is trying to write 200+GB
nightly from three file systems on this host to one tape.
How can I make it use both tape drives?
Currently it is taking about 8 hours to backup about 200GB nightly to
one drive.
I would like to improve on that performance.
My two ideas are:
1: reduce the number of target streams on each drive to two and then
have one drive take two streams and the other take one stream.
2: Maybe the drives need to be shared with each other?
Many thanks,
Bill
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