NEC 320Fc User Manual page 114

Glossary
Upgrade Side
The side of a split-mode system on which you can upgrade software. See also
Production
volume
A fixed amount of storage on a hard disk (or spanning many hard disks) that is
defined and managed as a single device in the operating system.
Glossary-6 Express5800/320Fc: Active Upgrade™ User's Guide
Side.