ADSM-L

Determining which side of an optical platter a file is on?

2005-10-14 18:29:00
Subject: Determining which side of an optical platter a file is on?
From: Justin Derrick <ADSM AT JUSTINDERRICK DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 14 Oct 2005 18:22:50 -0400
Hi TSMers...

I'm working on a project to extract archived data from almost 2000
optical platters.  The data needs to come out of TSM temporarily, be
reprocessed, and eventually, loaded back into TSM.  The problem is, I
want to do this in the most efficient way possible, and I'm having a
little trouble.

At this point in time, I'm getting the contents of individual volumes
with a select statement, similar to a 'query content'.  The only
catch is, I want to read all the files on one side of the platter
before switching it over to prevent the library from flopping
platters back and forth, which eats into the aggregate transfer speed.

Are their 'secret' tables or columns inside TSM that can tell me what
the exact location of a file on a platter is?  How does TSM know when
it's mounting a platter if it needs to be flipped over for a
retrieval?

Any assistance, information, guidance, etc. will be greatly appreciated.

Have a great weekend!

-JD.