Simple formulae: * # VTOC tracks = (max # datasets you want to have on the volume + max # datasets with > 3 extents + max # EAS datasets + 5) / 50. * # VTOCIX tracks = (max # datasets + 5) / 21;
I'd let SMS take care of the VVDS; it can grow if needed. Things that should go without saying (because they're obvious): 1. If you don't know the inputs, then you'll have to estimate, or guess. 2. It's much better to make the VTOC & IX bigger than necessary than too small. sas On Mon, Jul 6, 2020 at 7:01 AM R.S. <r.skoru...@bremultibank.com.pl> wrote: > W dniu 04.07.2020 o 19:12, Peter pisze: > > Hello Group > > > > Apology for being ignorant. > > > > Is there a formula or any constraints for initialising a specific dasd > Mod ? > > > > How do arrive to a specific vtoc and index value while initialising a > dasd ? > > > > Please help me to understand > > > > > > There is no formula. No *simple* formula. VTOC and VTOCIX size depends > on data you plan to keep on the volume. > Big number of small datasets will occupy more VTOC space. Single large > dataset will take very little space. > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
