I have 12TB of SATA storage in the form of a Virtual Tape Library (VTL)
appliance, in my case a SEPATON S2100-ES2. To TSM it's just a tape
library on steroids (rapid mounts, dismounts, etc). I have routinely
pushed in excess of 80 MB/sec. with no problems. It's scalable to 1PB
storage capacity and 4.3TB/hour. Mine is not that large, configured
with only 64 virtual tape drives. The drives even do compression just
like a real tape drive. I decided not to go with serial file devices
because I did wanted to keep the ability to do LAN-free backups, easy
scalability and did not want to force the overhead of compression on the
TSM clients or server.
Milton Johnson
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Paul Zarnowski
Sent: Wednesday, November 30, 2005 10:10 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: VTS or san disk storage
Any success stories out there for using large amounts of serial-access
disk with TSM?
At 06:19 PM 11/29/2005, you wrote:
>Richard,
>
>I share your pain.
>
>We have an EMC Clariion CX500 SAN. We have found that AIX in general,
>and TSM in particular, can just "hose" the sucker.
> > I have about 6TB of san disk space used for nightly backups and the
> > management of it is just a pain.
> > I am curious what kind of problems you are running into. At the TSM
> > Symposium at Oxford this year, IBM indicated that they were going to
> > further develop the serial access disk support in TSM. And, TSM 5.3
> > just added the ability for a SAD devclass to span multiple
> > filesystems. After hearing this, we have been leaning towards
> > investing in inexpensive disk managed by TSM rather than buying a
> > VTL appliance. I'm interested in other's comments about where,
> > specifically, they are having problems managing SAD directly by TSM.
--
Paul Zarnowski Ph: 607-255-4757
Manager, Storage Systems Fx: 607-255-8521
719 Rhodes Hall, Ithaca, NY 14853-3801 Em: psz1 AT cornell DOT edu
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