Glossary–2
Hitachi Unified Storage Hardware Service Guide
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A
Arbitrated loop
A Fibre Channel topology that requires no Fibre Channel switches.
Devices are connected in a one-way loop fashion. Also referred to as
FC-AL.
Array
A set of hard disks mounted in a single enclosure and grouped logically
together to function as one contiguous storage space.
B
bps
Bits per second. The standard measure of data transmission speeds.
C
Cache
A temporary, high-speed storage mechanism. It is a reserved section of
main memory or an independent high-speed storage device. Two types
of caching are found in computers: memory caching and disk caching.
Memory caches are built into the architecture of microprocessors and
often computers have external cache memory. Disk caching works like
memory caching; however, it uses slower, conventional main memory
that on some devices is called a memory buffer.
Capacity
The amount of information (usually expressed in megabytes) that can
be stored on a disk drive. It is the measure of the potential contents of
a device. In communications, capacity refers to the maximum possible
data transfer rate of a communications channel under ideal conditions.
CCI
See command control interface.
Challenge Handshake Authentication Protocol
An authentication technique for confirming the identity of one computer
to another. Described in RFC 1994.
CHAP
See Challenge Handshake Authentication Protocol.
CLI
See command line interface.
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