Networker

Re: [Networker] Windows2003 R2 change tape order at boot

2007-09-06 16:35:43
Subject: Re: [Networker] Windows2003 R2 change tape order at boot
From: Terry Lemons <lemons_terry AT EMC DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Thu, 6 Sep 2007 16:31:50 -0400
Hi Pierpa

I replied to your question (below) in a reply to another list posting.  But, I 
wanted to comment on something you mentioned, below:

"This tapes are connected through the SAN to a Qlogic FC board on my server on 
two different ports."

So, does your Windows 2003 R2 system see the same tape library twice: one time 
each on two different FC HBA ports?

If so, that sounds like a problem, in that multi-pathing for tape devices is 
very, very rare.

That said, the IBM Ultrium tape driver does support multi-pathing for both the 
control path (to the autochanger device) and to the data path (to the tape 
drive).  This is a licensed feature, and you need to pay IBM for the right to 
do this.  This is described in 
ftp://ftp.software.ibm.com/storage/devdrvr/Doc/IBM_Tape_Driver_IUG.pdf for the 
operating systems that support it.  Look for references to 'Control Path 
Failover' and 'Data Path Failover'.

Hope this helps.
tl

Terry Lemons
Backup Platforms Group
EMC² 
where information lives
4400 Computer Drive, MS D239
Westboro MA 01580
Phone: 508 898 7312
Email: Lemons_Terry AT emc DOT com

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of Pierpa
Sent: Thursday, September 06, 2007 7:03 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Windows2003 R2 change tape order at boot

Hi all,
I've a problem I'm not able to solve.
I'm using NW7.4 on a Windows2003 R2 server with a ADIC scalar24 library 
with 2 tapes in FC. This tapes are connected through the SAN to a Qlogic 
FC board on my server on two different ports. I've installed OEM IBM 
drivers for my LTO3 drives but sometimes, rebooting the server, the order 
of the tapes changes. Therefore the library is confused, thinking to 
manage tape1 instead of tape0 and viceversa. I don't know on Windows and 
on Qlogic if I can establish the tapes order. May I use on windows 
something like persistent binding ? 

Any suggestion will be appreciated

Pierp

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