yes, it will use the 80 volumes and distributing the IOs is good for the
global performance !

The number of tapes depends on the number of drives you have online,

regards,

>       René Lambelet
>       Nestec S.A. / Informatique du Centre 
>       55, av. Nestlé  CH-1800 Vevey (Switzerland) 
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>       email rene.lambelet AT nestle DOT com
>       Visit our site: http://www.nestle.com
> 
>               This message is intended only for the use of the addressee
> and 
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> 
> 
> -----Original Message-----
> From: Zoltan Forray/AC/VCU [SMTP:zforray AT VCU DOT EDU]
> Sent: jeudi, 13. septembre 2001 17:17
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      OS/390 TSM usage of disk volumes
> 
> I have a question about how the OS/390 version of TSM utilizes disk
> storage pools and why and possible future impact.
> 
> Currently, my disk "landing zone" storage pool has 38-individual DASD
> volumes, for a total of 90G+.  I noticed that when I do a Q VOL STG=, that
> *EVERY* "volume" (i.e. data set) has something in it, rather than fill up
> one before going to another (this is a royal pain when trying to
> delete/add volumes, but that is a different story.....).  So, when doing
> migration from this pool to tape, it has to perform I/O's to 38 disk
> volumes as well as the tapes.
> 
> I am getting ready to more than double this pool.  Does this mean that TSM
> will scatter data across all 80+ volumes ?
> 
> This seems like a lot of unnecessary overhead.
> 
> Any thoughts on this ?
> ===========================
> Zoltan Forray
> Virginia Commonwealth University
> University Computing Center
> e-mail: zforray AT vcu DOT edu
> voice: 804-828-4807