HP StorageWorks Disk Array XP operating system configuration guide: MPE/iX (A5951-96145, November, 2005)

Volume On the XP array, a volume is a uniquely identified virtual
storage device composed of a control unit (CU) component
and a log ical device (LDEV) component separated by a colon.
For example 00:00 and 01:00 are two uniquely identified
volumes; one is identifiedasCU=00andLDEV=00,and
the other as CU = 0 1 and LDEV = 00; they are two unique
separate virtual storage devices within the XP array.
VSC Volume size customization. Synonymous with CVS.
WWN WorldWideName. Auniqueidentifier assigned to a Fibre
Channel device.
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Glossary