David,
   
  I can live with that (vvds in extents).  It is a user test volume.
   
  I will have to examine the process of allocating a vvds in the same job as 
the initialize of the volume.  This would save a lot of headaches.
   
  Thanks for the reassurance and advice from all.

"O'Brien, David W. (NIH/CIT) [C]" <[EMAIL PROTECTED]> wrote:
  Willie,

CI size for the VVDS is 4096. For 10 trks that computes to 120 CIs in the VVDS.

For a SMS managed volume each file will require the following # of bytes:

KSDS 530
ESDS 370
Linear 340
Non-VSAM 100

I suspect you're not going to have a problem. Worst case your VVDS goes into 
extents.

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