HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

Glossary
264 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
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 HSG60 and
HSG80 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.