On Wednesday, 12/02/2009 at 07:37 EST, Charles Grady <[email protected]> wrote: > OK. I have a z/VM vol that contains a 'full pack' mdisk for a linux guest. > when trying to back up this vol from z/OS with DFDSS he complains about > there not being a valid VTOC. IS there a way to just "clip" the VTOC to get the > information in the right format and NOT distroy the data. The mdisk is cyl > 0001-3337 on volid NLNX0A.
Do not clip a volume that z/OS doesn't own. BTW, an mdisk that starts on cyl 1 is not a "full pack" mdisk. That means that if your z/OS is running in an LPAR, it will see real cyl 0 (owned by CP in this example), not cyl 1 (owned by Linux). Caveat emptor: External backups of a live Linux guest will be fuzzy. That is, incomplete and inconsistent, just as a z/OS backup would be if taken using DDR on CMS while z/OS is running. Build your backup/restore procedures accordingly. (Best is to shut down the Linux guest and then copy the disks.) Alan Altmark z/VM Development IBM Endicott
