We do 2). Can't afford to loose anything. Make sure to use write cache for
performance.

Ken

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
> Jim Jepson
> Sent: Thursday, May 24, 2001 18:23
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: AIX Disk-pools; mirror, RAID or simple copy-pool???
>
>
> TSM Admin Group,
>
> Sorry to bother the group with this yet again.  I know it was been
> discussed before, and I wadded through many messages on ADSM.org
> archives.
>
> I have TSM 4.1.3 running on an H80.  My 100GB initial disk storage pool,
> which migrates to a AIT-2 tape storage pool has me concerned.  I purge
> this pool to tape each mid-morning after backups finish, and again each
> night before my evening backups start.
>
> Now I m a firm believer in a DB Copy-pool (TSM mirror) however, no one
> talks about a disk storage pool copy-pool.  If you have a large initial
> disk storage pool (ours is 100GB and could grow significantly if we get
> another SSA Drawer) there is a real threat of a disaster if you loose a
> disk in that disk array.
>
> I was planning to run with a 100GB disk storage pool, and then have that
> mirrored (via TSM) to a disk storage pool copy-pool.  I did this on a
> older version 2 server years ago.
>
> So my question is if you have a significant amount of disk.  In this
> case 200GB (six 36GB disks separated into two 3 disk volume groups).
> What is the hot setup?!?
>
> Here are the configuration scenarios I am considering:
>
> 1) Setup two 3 disk volume groups, with one vg as the initial disk
> storage pool, and the other a copy pool (TSM mirror) -- which is what I
> intended to do, yet doesn't seem to be an option in TSM 4 any more.
>
> 2) RAID 5 the six 36GB disks into one volume group, and utilize AIX RAID
> to keep the disk pool healthy.
>
> 3) Glome the disks into one 200GB disk storage pool, and continue my
> daily purge  procedures.
>
> 4) Setup disk vgs as in step one, creating the initial disk storage
> pool, and the another disk storage pool with the pool type of copy, and
> backup the initial disk storage pool at specific times -- this is what
> TSM support recommended.
>
> Any opinions and/or ideas would be appreciated.
>
> Many Thanks,
>
>          _/_/_/    _/_/_/  Jim Jepson, L&RE System Admin & Networking
>           _/        _/     Apple Computer, Inc.
>          _/        _/      3 Infinite Loop Cupertino, CA 95014
>   _/    _/  _/    _/       Direct: 408-974-6368  FAX: 408-996-3783
> _/_/_/_/  _/_/_/_/        MS:303-1SC,  E-MAIL:
>