Hi, Sorry David I don't understand the VG's are cheap statement.

Your Volume groups are made up of 1 or more hdisks provided locally or from the 
SAN.

I've split my VG's into 5 types of VGs

Dbvg     <- Databases
Logvg    <-Logs
Instvg   <-Instance
Bkvg    <- DB Backup
Stgvg      <- Disk storage pools

And all have 2 hdisks mirrored across two SANs for protection with exception of 
the stgvg as this is just a staging area for the transient data.

This is just one way of doing it.  With Two VGs you would just have to 
structure your Logical Volumes (Filesystems) Across the 2 Volume Groups.

If you only have a small amount of hdisks available then you could get away 
with one Volume Group.

Hope that is a little helpful.

Jason Barkes
TSM and AIX Administrator.

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
David Ehresman
Sent: 15 July 2015 14:12
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Disk layout for AIX

VGs are cheap.  Why does your AIX admin want to reduce the number of VGs?

David Ehresman

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Huebner, Andy
Sent: Wednesday, July 15, 2015 9:03 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Disk layout for AIX

I have an AIX admin that wants to build my new TSM server using two VGs for the 
database (6 file systems) and one VG for the various logs.
We currently have 6 VGs for the DB and 3 VGs for the logs.  Each VG contains 1 
file system.

The DB is about 375GB and the new hardware is a P8.

No TSM de-dup.

Should I be concerned about the DB setup?


Andy Huebner
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