B
back-end director (BED)
The hardware component that controls the transfer of data between the
drives and cache. A BED feature consists of a pair of boards. A BED is also
referred to as a disk board (DKB).
BED
See back-end director.
bind mode
In bind mode the Cache Residency Manager extents are used to hold read
and write data for specific extent(s) on volume(s). Data written to the
Cache Residency Manager bind area is not destaged to the drives. For
bind mode, all targeted read and write data is transferred at host data
transfer speed.
blade
A computer module, generally a single circuit board, used mostly in
servers.
C
cache logical partition (CLPR)
Consists of virtual cache memory that is set up to be allocated to different
hosts in contention for cache memory.
capacity
The amount of data storage space available on a physical storage device,
usually measured in bytes (MB, GB, TB, and so on).
CCI
Command Control Interface
CHAP
challenge handshake authentication protocol
CLPR
See cache logical partition (CLPR).
388 Glossary
System Administrator Guide for VSP Gx00 models and VSP Fx00 models