I don't quite understand what you mean that the 3494 does not have
SAN capability.  You can most certainly use a 3494 in a SAN environment.
The SAN is where the data movement happens.  The 3494 'just' puts tapes into
the drives and manages the library inventory.  Only your drives need to be
on the SAN.  These can be 3590 drives with a fibre channel attachment, or
SCSI 3590 drives attached to a SAN data gateway.  All of your host machines
can attach to the 3494 via ethernet.
There is a redbook that describes setting up a SAN environment with
TSM.  http://www.redbooks.ibm.com/redbooks/SG246132.html
In there it describes a 3494 setup. Plus migration considerations for
going to a SAN environment.

James Thompson

From: Palmadesso Jack <Jack.Palmadesso AT SWPC.SIEMENS DOT COM>
Reply-To: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: SAN Solution
Date: Tue, 13 Mar 2001 11:12:38 -0500

Hi Geoff,
One of my machines is configured exactly the same way except for the TSM
part(in the works.)  We have recently installed a large EMC backend for our
Solaris and NT machines.  I've been asked the same question as you.  Here
is
what I found out.  Yes you can backup over a SAN.

BUT it currently only works with certain agents.  From what I was told you
can use the Oracle, Exchange and SQL agents.  Currently the normal
backup/archive client software does not support SAN backups but is in the
works.

From a hardware perspective if you have 3590 E drives then you can convert
them from SCSI to Fibre Channel and put them on the SAN.  This is the
supported config.  The biggest problem right now is that the 3494 itself
does not have SAN capability.  Unfortunately this was the show stopper for
me.  For the time being I am preparing for eventual attachment to the SAN
by
upgrading as many other things as I can with the last step being the
upgrade
of the 3494.  Things are changing very quickly in this area so what may
have
been so last week no longer may be true.  You definitely want to talk with
the TSM folks and your backend storage provider.

-----Original Message-----
From: Gill, Geoffrey L. [mailto:GEOFFREY.L.GILL AT SAIC DOT COM]
Sent: Tuesday, March 13, 2001 10:47 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: SAN Solution


I've been asked to investigate a SAN solution and wonder if someone can
give
me some info. Currently we are backing up over the network to TSM 4.1.2.0
which runs on an H50, AIX 4.3.3 with an automated 3494. If anyone is
currently configured and running could you drop me a line please. I'd like
to know what the initial cost was, if you had a similar setup, how much
trouble was it to change? Will I have to "redo" my current TSM
installation?
Should I start with a new installation of TSM altogether and then migrate
the data? What extra hardware/software, over and above what I have now, is
involved?

Any help is greatly appreciated.

Thanks,

Geoff Gill
NT Systems Support Engineer
SAIC
Computer Systems Group
E-Mail:   gillg AT saic DOT com
Phone:  (858) 826-4062
Pager:   (888) 997-9614

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