HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide

Glossary
–3HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
Glossary–3
block
Also called a sector. The smallest collection of consecutive bytes
addressable on a disk drive. In integrated storage elements, a block
contains 512 bytes of data, error codes, flags, and the block address
header.
bootstrapping
A method used to bring a system or device into a defined state by
means of its own action. For example, a machine routine whose first
few instructions are enough to bring the rest of the routine into the
computer from an input device.
built-in self-test
A diagnostic test performed by the array controller software on the
controller policy processor.
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.
cache module
A fast storage buffer
CCL
CCL-Command Console LUN, a “SCSI Logical Unit Number”
virtual-device used for communicating with Command Console
Graphical User Interface (GUI) software.
channel
An interface that allows high speed transfer of large amounts of data.
Another term for a SCSI bus. See also SCSI.
chunk
A block of data written by the host.
chunk size
The number of data blocks, assigned by a system administrator, written
to the primary RAIDset or stripeset member before the remaining data
blocks are written to the next RAIDset or stripeset member.
CLCP
An abbreviation for code-load code-patch utility. This utility is used to
upgrade the controller and EMU software. It can also be used to patch
the controller software.
CLI
See Command Line Interface.
coax
A two-conductor wire in which one conductor completely wraps the
other with the two separated by insulation.
cold swap
A method of device replacement that requires the entire subsystem to
be turned off before the device can be replaced. See also hot swap and
warm swap.