On Wed, 5 Dec 2007 17:13:00 -0800, Edward Jaffe wrote:
>
>Of course, you're right! CCHHR is five *bytes* long. We currently use
>only four bits of the sixteen allocated for HH. So, that means we could
>use an additional twelve bits to extend the disk size to 4K times the
>current 54GB size! (Thanks for correcting me.)
>
I'd certainly not correct someone of your expertise without first RTFM,
and even then with some trepidation that I might have misinterpreted.

Ummm.  Imagine the effect on a "dusty JCL deck" which said,
"DD  SPACE=(CYL,100)".  But perhaps not.  ISTM that SMS or DYNALLOC
(or maybe even ISPF) sometimes adjusts my requested SPACE to
account for the difference between 3380 and 3390.

There's a powerful argument here for requesting SPACE in blocks.

-- gil

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