Curtis,
I'm sure you'll get a lot of responses on this, so consider my comments
just part of the chorus. If I understand SSO correctly, only the tape
drives are shared, not the robot. The robot is controlled by a single
server which handles all tape mounts/unmounts. In addition, this server
also coordinates access to the tape drives. It does this by running the
'vmd' process (on a Unix system) in 'device allocation' (DA) mode.
-- Tony Guzzi
Solutions Engineer, AssuredRestore team
Storability, Inc.
118 Turnpike Road
Southborough, MA 01772
www.storabilility.com
The Leading Provider of Automated Storage Assurance for the Enterprise
veritas-bu-request AT mailman.eng.auburn DOT edu
Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu
05/31/2001 01:06 PM
Please respond to veritas-bu
To: veritas-bu AT mailman.eng.auburn DOT edu
cc:
Subject: Does SSO Use SCSI Reserve/Release?
Message: 5
Date: Thu, 31 May 2001 09:55:36 -0700
To: veritas-bu AT mailman.eng.auburn DOT edu
From: "W. Curtis Preston" <curtis AT backupcentral DOT com>
Subject: [Veritas-bu] Does SSO Use SCSI Reserve/Release?
I'm getting conflicting information from a couple of different sources,
and
I KNOW that someone out there knows the real answer.
How does SSO (for NetBackup & BE if possible) managed contention for the
robot? It would seem that this could be done in one of two ways:
1. It uses the SCSI Reserve command when it starts to use the arm.
<...... text deleted. -AJG ......>
---
W. Curtis Preston
Principal Consultant for Storage Designs, your storage experts
Webmaster: http://www.backupcentral.com Phone: 760 631 7991
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