Just to poll the list - Is it a good idea to have every media server see
every tape drive?  I have configured environments that way and also to
only let specific media servers see a subset of the tape drives.
Usually this is due to other constraints, such as reducing SAN ISL
traffic.  But I would think it would also reduce network traffic as
well.  I have not had problems with downed drives and the like with
either config. (4.5 FP5)

Thoughts?

Thanks,

Brad Hillebrand

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Terry
Gibbar
Sent: Tuesday, April 27, 2004 7:31 AM
To: Mark.Snow AT aseriti DOT com; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] NBU 4.5 SSO environment question

The only issues that I've seen are with server reboots.

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of
Mark.Snow AT aseriti DOT com
Sent: Tuesday, April 27, 2004 2:24 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] NBU 4.5 SSO environment question






Has anyone seen this problem before?

Env= NBU 4.5 FP5, Solaris8 master, solaris, NT, W2K, HP-UX 11 media
servers
and clients

We are currently looking at the best way to implement an additional 5 x
9840 drives into our tape SAN (currently has 4 drives), the process
would
be as below:

1. Install the 5x9840 drives
2. Configure the new drives at the OS and in Netbackup to an exisiting
media server, so that server can see all drives (9 in total)
3. Test new drives are working correctly on that one server
4. Over a set period configure the new 5 drives to each of the media
servers, so eventually all media servers can see all 9 drives

Before step 4 is fully completed there will be a point where only some
media servers can see all the drives, would this cause a problem for the
media servers that cannot see all the drives. It has been seen in our
old
Tape SAN that if some media servers can see only some of the drives in
an
SSO environment, then this causes these servers problems, such as
mounting
tapes on the wrong drives and downing drives. This problem was seen
using
netbackup 3.4.

Has anyone had any experience of similiar problems, or any comments
would
be welcomed

Thanks

Mark Snow



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