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 beendiscussed before, and I wadded through many messages on ADSM.orgarchives.

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 purgethis pool to tape each mid-morning after backups finish, and again eachnight before my evening backups start.

Now I’m a firm believer in a DB Copy-pool (TSM mirror) however, no onetalks about a disk storage pool copy-pool. If you have a large initialdisk storage pool (ours is 100GB and could grow significantly if we getanother SSA Drawer) there is a real threat of a disaster if you loose adisk in that disk array.

I was planning to run with a 100GB disk storage pool, and then have thatmirrored (via TSM) to a disk storage pool copy-pool. I did this on aolder version 2 server years ago.

So my question is if you have a significant amount of disk. In thiscase 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 diskstorage pool, and the other a copy pool (TSM mirror) -- which is what Iintended 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 RAIDto keep the disk pool healthy.

3) Glome the disks into one 200GB disk storage pool, and continue mydaily purge procedures.

4) Setup disk vgs as in step one, creating the initial disk storagepool, and the another disk storage pool with the pool type of copy, andbackup the initial disk storage pool at specific times -- this is whatTSM support recommended.


Any opinions and/or ideas would be appreciated.

Many Thanks,

        _/_/_/    _/_/_/  Jim Jepson, L&RE System Admin & Networking
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