Same here (for a VM resident) DITTO/ESA for VM DVT - Display VTOC Line 1 of 2
Unit 0130 VFRRES 3390 with 3339 cyls, 15 trks/cyl, 58786 bytes/trk --- Data Set Name --- Ext Begin-end Reltrk, 1...5...10...15...20...25...30. seq Cyl-hd Cyl-hd numtrks *** VTOC EXTENT *** 0 0 0 0 0 0,1 *** FREE EXTENT *** 0 0 1 3338 14 1,50084 *** This volume is currently 0 % full with 50084 tracks available Maybe MVS is looking at some other field to find out if there still is free space 2008/1/18, Alan Altmark <[EMAIL PROTECTED]>: > On Thursday, 01/17/2008 at 09:42 EST, Kris Buelens > <[EMAIL PROTECTED]> wrote: > > VM doesn't use VTOCs to describe disk contents; the CP directory tells > which > > cylinders are allocated as minidisks, and the CP allocation map tells CP > which > > cylinders to use for PAGE, SPOOL, etc. > > After a CPFMTXA FORMAT, I used DITTO to look at the VTOC that *is* on the > volume: > > --- Data Set Name --- sorted by NAME ----- Ext Begin-end Reltrk, > > 1...5...10...15...20...25...30...35...40.... seq Cyl-hd Cyl-hd numtrks > *** VTOC EXTENT *** 0 0 0 0 0 0,1 > > *** FREE EXTENT *** 0 0 1 4 14 1,74 > *** This volume is currently 1 percent full with 74 tracks available > > I had always thought that a "full" VTOC was written by DSF so that MVS > would not attempt to allocate space on a CP-owned volume. It is a 5 cyl > 3390. > > Alan Altmark > z/VM Development > IBM Endicott > -- Kris Buelens, IBM Belgium, VM customer support
