IBM Magstar 3494 manual Virtual telecommunications access method Vtam, Volume. See cartridge

of a Virtual Tape Server. When a virtual volume is copied from the Tape Volume Cache to a stacked volume it becomes a logical volume. When a logical volume is recalled from a stacked volume to the Tape Volume Cache it becomes a virtual volume.

virtual telecommunications access method (VTAM).

Virtual Telecommunications Access Method. A form of LAN communication protocol.

vision system. A Class II laser bar-code reader used to identify tape cartridge labels and other features in the 3494.

volser. Volume serial identi®er. The physical label on the cartridge. Also, the same or different identi®er encoded on the magnetic tape.

volume. See cartridge.

W

wall. Walls located inside the library house the cartridge storage cells. The walls on the front doors of the library are labeled with even numbers and the walls on the rear of the library are labeled with odd numbers.

346Magstar 3494 Tape Library Operator Guide