>Greetings all
>
>I have just tried to use SSA disks as a primary storage pool for one of our
>NT clients (running ADSM 3.1.0.7)
>
>1. I created a storage pool with a device class of DISK (Using RS6000 AIX
>4.1.5 & ADSM server 3.1.2.20)
>2. Formatted 10 1.5 Gb files on the SSA disks using dsmfmt -m -data
>xxxxxxxxxxxx 1500
>3. Defined these disk storage pools to my storage pool created in 1. above
>4. Created a Mgmnt class to use this new storage pool
>5. Changed my dsm.opt file on the NT server to use this mgmnt class
>6. Ran a first-time incremental backup on one of the drives.
>
>While the backup was executing I noticed that all 10 of my disk storage
>volumes were being used at the same time, i.e. they were all filling at the
>same time.
>
>Worst of all - this backup took 1h45 mins to backup 2.8 Gb.
>To compare, I am backing up 20Gb to tape in 2h10mins on another NT server
>connected on the same network.
>
>Anybody with ideas, firstly why it used all 10 volume (disk files) at the
>same time, and secondly why the performance is so slow. I would expect disk
>storage to be faster.
>
>
>Many thanks
>
>Grant Cohn
>Shell & BP Petroleum Refineries
>Prospecton
>DURBAN
>South Africa.