Mehdi, Windows can "allocate" a file in NTFS without having to write data
into it. The Linux/Unix (including AIX) platforms have to write data into a
file in order to create it to the desired size. You can actually see the
progress of the file being created on Unix - cd into the directory in which
the file is being created as result of your define volume TSM command, then
do repetitive ls commands to see the progress.

Joerg Pohlmann
250-585-3711

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Mehdi Salehi
Sent: Tuesday, March 02, 2010 01:25
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] define volume takes a long time in AIX

Hi,
TSM volumes can be defined instantly in TSM server for Windows but take
several minutes in TSM for AIX. What could be the reason?
- AIX version is 5.3 with latest patch on both platforms
- volume is defined on a single internal physical disk (no SAN, no RAID)
- windows disk is a 500GB SATA, AIX disk is a 36GB 10K rpm SCSI drive
- windows can define a 100GB volume in one second, but AIX defines a 30GB
one in some minutes!

Thanks,
Mehdi