Johnny,

How much total data do you have in primary pools?

Tsm> audit licen
Tsm> q auditocc pooltype=primary > auditocc.out

I like Ken's idea: do as much disk as you can afford and LTO4 tape for
DR. In your case, your DR data will fit on one LTO4 tape (and probably
less than 1) per day and take perhaps four hours to write depending on
how fast your disks are.

Our hot spot solution for a site like yours is around 30TB of raw disk
(we're waiting for TSM dedup) and an LTO4 library with two drives, 60
slots or so (depending on the answer to your q auditocc).  The libraries
we're using are expandable up to 120 slots so we have growth and we can
always add more disk.  Compared to xx92 series tape drives, disk is
pretty reasonable these days...

Thanks,

Kelly Lipp
CTO
STORServer, Inc.
485-B Elkton Drive
Colorado Springs, CO 80907
719-266-8777
www.storserver.com


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Bradberry, Kenneth
Sent: Wednesday, February 13, 2008 11:04 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] TSM dream setup

My dream setup has no tape, VTL disk, deduplicated and replicated to an
off-site or hot site location.  FalconStor and SEPATON are my two
choices.  


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Schneider, John
Sent: Wednesday, February 13, 2008 11:56 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: TSM dream setup

Johnny,
        We are in the process of migrating from an IBM3584 tape library
with 3592 to another IBM3584 with LTO4.  When we first got the LTO4 tape
drives (last August) we got occasional I/O errors on them, but after a
couple of firmware updates from IBM, they have been working just fine.
We have done some significantly large test restores, and those have also
worked without any problems.
        The LTO4 is being used for all the local storage pools, and the
3592 is being used for the copy storage pools.  We would be completely
off the 3592 drives by now if we weren't waiting for our DR vendor to
support LTO4 drives.

Best Regards,

John D. Schneider
Lead Systems Administrator - Storage
Sisters of Mercy Health Systems
3637 South Geyer Road
St. Louis, MO  63127
Phone: 314-364-3150
Cell: 314-486-2359
Email:  John.Schneider AT Mercy DOT net


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Johnny Lea
Sent: Wednesday, February 13, 2008 10:38 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] TSM dream setup


I'm looking for some ideas for upgrading/replacing my tsm servers and
libraries.  I backup about 800GB per night and have about 250 client
nodes. I have a 7 year old Sun server connected to an IBM 3494 with six
3590 drives and a Dell 6800 with 22TB of disc connected to a LTO3
library. I've thought about replacing the 3590 drives with 3592 but I'm
thinking a new LTO4 library might be better.
 
If you could get what you wanted what would it be?
 
Thanks,
Johnny
 



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