Cache Module - HP StorageWorks HSG80 Array Controller V8.7 Maintenance And Service Manual

Glossary
byte
A binary character string made up of 8 bits operated on as a unit.
cache memory
A portion of memory used to accelerate read and write operations. The objective of caching
data in a system is to improve performance by placing the most frequently used data in the
highest performance memory.

cache module

A fast storage buffer.
channel
An interface which allows high speed transfer of large amounts of data. Another term for a
SCSI bus. See also SCSI.
chunk
In any form of RAID that stripes data, data is stored in pieces called chunks. One chunk is
stored on each member device in the unit. Taken together, the chunks make up a stripe. The
chunk size can be used in some controllers to tune the stripeset for a specific application.
CI bus
Computer Interconnect bus. A serial 70 MHz, dual path, party-line, bus. It is the host bus for
the HSJ-series controller-based storage systems. The CI bus is used by OpenVMS hosts to
connect the nodes in a clustered subsystem.
CLCP
Code-Load Code-Patch utility. This utility can be used to download patches to the Array
Controller Software.
CLI
Command Line Interpreter. A command line entry utility used to interface with the HS-series
controllers. CLI enables the configuration and monitoring of a storage subsystem through
textual commands.
code-load code-patch utility
See CLCP
command line interpreter
See CLI
computer interconnect bus
See CI bus
Glossary–2 HSG80 Array Controller V8.7 Maintenance and Service Guide