HP StorageWorks 6000 Virtual Library System - Manual (Page 345)

storage pool Multiple disk arrays logically grouped together from which the dynamic disk
filesystem allocates storage. The disk arrays in a VLS are automatically configured
into one storage array.
tape drive (1) A device that reads data from and writes data onto tape.
(2) A software emulation of a tape drive is called a virtual tape drive.
virtual tape A disk drive buffer that emulates one physical tape to the host system and appears
to the host backup application as a physical tape. The same application used
to back up to tape is used, but the data is stored on disk. Also known as a piece
of virtual media or a VLS cartridge.
Data can be written to and read from the virtual tape, and the virtual tape can
be migrated to physical tape.
virtual tape drive An emulation of a physical transport in a virtual tape library that looks like a
physical tape transport to the host backup application. The data written to the
virtual tape drive is really being written to disk.
virtual tape library A disk drive buffer containing virtual tape and virtual tape drives.
WWNN World wide node name. A globally unique 64-bit identifier assigned to each
Fibre Channel node process.
WWPN World wide port name. A unique 64-bit address used in a FC storage network
to identify each device in a FC network.
HP StorageWorks 6000–series Virtual Library System User Guide 345