I would be more worried about specifying enough space for the current contents and calculating a nice secondary space value. 10% for a 16 extent type. Maybe 1% for a 1## extent type.
On Wed, May 6, 2015 at 3:54 PM, Walt Farrell <[email protected]> wrote: > On Wed, 6 May 2015 16:19:31 -0400, Tony Harminc <[email protected]> wrote: > >>On 6 May 2015 at 15:07, John Eells <[email protected]> wrote: >>> I never actually checked, but I "assume" that ISPF and other things that >>> show used space in allocation request units other than tracks or cylinders >>> use the DS1DSPAC fields and track length to calculate space in those >>> original request units. >> >>But how does it know what those original units were? > > DS1DSPAC shows you the original _units_ (trk, cyl, average block). As far as > I know (and as others have said) nothing will show you the original _number_ > of those units requested for the primary allocation, which seems to be the > OP's desire. > > Even ISPF does not claim to show you the _primary_ allocation. It shows, as > mentioned by the OP earlier, the value of the "1st extent". The primary > allocation is made up of a first extent and up to 4 other extents. ISPF just > shows the size of the first extent, which in many cases will be some value > less than or equal to the requested primary space. (But if adjacent extents > have been collapsed together it could, I suppose, be a value greater than the > requested primary space.) > > -- > Walt > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
