DDR TYPE of cyl 0, track0 is still a lot of data. One should know which fields to display.
2008/1/18, Dale R. Smith <[EMAIL PROTECTED]>: > > IIRC, ICKDSF CPVOLUME FORMAT is supposed to set the FMT5 DSCB in > the "VTOC" for a volume to indicate that there is no free space on the > > volume. The FMT4 DSCB should contain the size of the volume. I'm not > > sure what DITTO is looking at, but z/OS should be using the FMT5 DSCB. > > What does a DDR TYPE of cylinder 0, track 0 show? > > -- > Dale R. Smith > > "There is a theory which states that if ever anybody discovers exactly > what the Universe is for and why it is here, it will instantly disappear > and be replaced by something even more bizarre and inexplicable. > There is another theory which states that this has already happened." > - Douglas Adams > > On Fri, 18 Jan 2008 09:35:10 +0200, Kris Buelens <[EMAIL PROTECTED]> > > wrote: > > >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 tel > ls > >> which > >> > cylinders are allocated as minidisks, and the CP allocation map tell > s > 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 c > yl > >> 3390. > >> > >> Alan Altmark > >> z/VM Development > >> IBM Endicott > >> > > > > > > > >-- > >Kris Buelens, > >IBM Belgium, VM customer support > -- Kris Buelens, IBM Belgium, VM customer support
