a logical subdivision (or all) of a physical disk pack that has its own virtual device address, consecutive virtual cylinders (starting with virtual cylinder 0), and a VTOC or disk label identifier. Each user virtual disk is preallocated and defined by a VM directory entry as belonging to a user.
A direct access storage device (DASD) or a logical subdivision of a DASD that has its own virtual device number., , , , , , , , , , , , , , , , , , , X, Y, , Symbols and Numerics Return to Glossary.