On Tuesday, 02/10/2009 at 02:18 EST, Brian France <b...@psu.edu> wrote: > We use FDR here. Run CPFMTXA to put an index vtoc on the vol at 0 that z/OS can > see. FDR then just dumps the entire volume. Once, we did not do CPFMTXA and > z/OS could not handle the volume. Had to run CPFMTXA on the 0 - 1 cyls to put > that index vtoc out there.
Um, not all volumes have a VTOC on cyl 0. A guest can have cyl 0 and it is not *required* to have a VTOC. If you write one, you may well overlay user data. Of course, if there is no VTOC, the VTOC pointer will be blank (if it is a VOL1 label) or, more likely, it will not be VOL1. FDR/DFDSS need to handle these cases. There's a reason that volume labels follow a set of standards! :-) Alan Altmark z/VM Development IBM Endicott
