Veritas-bu

[Veritas-bu] SAN Switch Change caused NBU7 to lose tape drives

2010-07-07 23:03:58
Subject: [Veritas-bu] SAN Switch Change caused NBU7 to lose tape drives
From: Brandon35 <netbackup-forum AT backupcentral DOT com>
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Date: Wed, 07 Jul 2010 23:03:53 -0400
Hi everyone,

In one of my environments we replaced our old SAN switch with a new Cisco. We 
went from 1 fabric on the old switch to 2 fabrics on the new Cisco switch.

We split up the tape drives 1, 2, 3, 4 on Fabric A. 5,6,7,8,9 on Fabric B.

After this switch, our media servers are having enormous trouble seeing the 
tape drives at all. One media server see's 6 tape drives which makes no sense 
at all. One media server see's all 9. Another media server see's 7.

No rhyme or reason to any of it. Why would a switch change cause this?

Our zone's have been thoroughly checked multiple times. Each tape drive is 
presented to the media servers, I assure you.

One of our Windows media servers see's only 6 tape drives in Device Manager, 
but San Surfer shows that the HBA see's all 9....

A Solaris 9 media server see's 9 tape drives, but netbackup only see's 7.

So, what do you guys think could be going on? Do I need to do something to the 
HBA's like reset, so they forget the previous paths? Could tape drivers be the 
potential issue, can tape drivers cause an issue with 1 switch over another? I 
am completely out of ideas so im throwing random ideas out... Anyone??

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