It also wouldn't hurt to verify that your library and drive code
(firmware) are up-to-date. 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Jim Skinner
Sent: Thursday, October 20, 2005 11:36 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] TSM Performance with 3584 LTO-2 Drives

I believe the first thing to check is the zoning of the fiber channel
network. TSM server and disk in one zone and in a different zone put tsm
server and tape.  We had a similar problem.
>>> osborn AT RPI DOT EDU 10/20/05 11:22 AM >>>
Hi,

We're recently connected a 3584 with one L52 frame containing 2 LTO-2
fiber attached drives to our AIX server. We'll be using FAStT SATA
disk as a primary storage pool and migrating from disk to tape.  Can
anyone with a  similar setup provide any statistics on how this works
in the real world, i.e. MB/sec or GB/hour from disk to tape.

A test migration of 259 GB (152422 files) took 10.5 hours to
complete. This seems like abysmally slow performance, or is it
reasonable with a large numbers of small files?

TSM version: 5.3.1

MoveBatchSize     500
MoveSizeThresh    512

AIX version: 5.1

Chet Osborn
Systems Programmer
Rensselaer Polytechnic Institute

Jim Skinner
The University of Kansas Hospital
Westwood Campus
Information Technology Systems
2330 Shawnee Mission Parkway, Suite 201/068
Westwood KS 66205-2005
913-588-4787


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