Veritas-bu

[Veritas-bu] single initiator zoning

2009-02-27 13:23:27
Subject: [Veritas-bu] single initiator zoning
From: "Geyer, Gregory" <Gregory.Geyer AT avnet DOT com>
To: <veritas-bu AT mailman.eng.auburn DOT edu>
Date: Fri, 27 Feb 2009 08:35:23 -0700

I believe our SAN admin has one zone which includes all the tape drives and all the HBAs for the media servers.  Makes it easy for him.

But we have performance problems.  And there is one other zone I think with just a couple of HBAs in it that performs very well. I've been harping on zoning as a possible cause to our problems and have run across this in Brocade's Zoning Best Practice guide (link provided below).

Are there Netbackup environments out there with one large zone containing many HBAs on it that isn't having performance problems?  I've been trying to lobby to get that fixed, or at least tested further.

The meat of the pdf is:

The recommended grouping method for Zoning is Single Initiator Zoning (SIZ), sometimes
called “Single HBA Zoning.” With SIZ, each zone has only a single HBA and one or more
storage ports. If the HBA has both disk and tape storage devices, then you need to create two
zones: one zone with the HBA and the disk devices and a second zone with the HBA and the
tape devices. SIZ is optimal because it prevents any host-to-host interaction and limits RSCNs
to just the zones that need the information within the RSCN.

and the link:

http://www.boche.net/blog/wp-content/uploads/2009/Zoning_Best_Practices_WP-00.pdf

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