If a drive is visible to one and
only one server because of zoning , then SSO isn't necessary. SSO is used
to share a single drive among multiple media servers. Each server uses it
in turn but then releases it after use to be used by a different server.
While you may be licensed for SSO, what you're describing won't need it.
You could still limit the use of
drives by each media server through multiple techniques - storage units "max
drive" setting comes to mind - so that only X number of drives are used
simultaneously per media server. You could still have it choose that X
drives from a shared pool of all your drives. I suspect your servers are
more than capable of keeping two drives busy (subject to throttling introduced
by your back-end SAN & HBA speeds).
Your storage guys are, IMO,
being too conservative.
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of David
Turner
Sent: Tuesday, June 30, 2009 2:55 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Cc: Will Tucker
Subject: [Veritas-bu] SSO Option for LTO3 drives
I have 1 windows master running Netbackup 6.5 with 3 media
servers. I have Storagetek/Sun SL8500 with 8 LTO3 tape drives (2 drives
are dedicated via NDMP to a Netapp 3050). All drives are connected via FC to
brocade etc. we have the Shared storage option but I don’t think
it’s working properly. How can I verify that its working?
I believe the engineers that configured the zoning on the
switch dedicated 2 drives per server and dedicate 2 to the Netapp. Did it makes
sense to purchase SSO?
I was told you should only have 2 LTO3 drives per servers
because of “shoe shining” and the servers ability to handle more
than 2 drives (Dell 2950’s quad cores with 8gig of ram). I am wondering
if the switch should be rezoned to make use of SSO or can the zoning have an
impact on how SSO should be configured? How can these 2 play together?
As you can see I am all confused and would love for someone
to explain this in simple terms.
thanks