TSM and LTO Throughput

2004-04-23 16:38:52
Subject: TSM and LTO Throughput
From: "Coats, Jack" <Jack.Coats AT BANKSTERLING DOT COM>
Date: Fri, 23 Apr 2004 15:38:21 -0500
Ok, I have a winders 2K box with 6 SCSI-attached LTO-1's with TSM
but it has a dual xenon 1.7G set of processors, and 1G of ram with 2G of
swap space.

The LTO's are in a IBM 3483-L18.  There are two LTO's on each of 3 separate
SCSI chains (they are 160 adapters, de-tuned to 80 in the adapter BIOS,
because the LTO's I have won't work at 160).  But even at that two LTO-1's
should not outpace a 80MB/Sec SCSI adapter.

What kind of throughput are you folks seeing with SCSI attached LTO-1's?

I am trying some timeing doing migrations right now.  If others are
interested I will report back.

Why am I asking?  I think I have some performance issues, just getting data
to/from tape, and can't seem to figure out where to look to find answers!
You guys being a 'similar user base' have some similar stats, that could
tell me if I am working 'as designed' or far behind the power curve.

TIA ... Jack

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