Glossary
Glossary-2
Compaq Smart Array 5i Plus Controller and Battery Backed Write Cache Enabler User Guide
COMPAQ CONFIDENTIAL
Writer: Amy L. Laffitte File Name: q-glossary
Codename: Executor Part Number: 266328-001 Last Saved On: 2/4/02 4:28 PM
array capacity expansion
See
capacity expansion.
Automatic Data Recovery (ADR)
Also known as rebuild. A process that automatically reconstructs data from a failed drive and
writes it onto a replacement drive. Rebuild time depends on several factors, but at least 15
minutes should be allowed per gigabyte.
cache
A high-speed memory component, used to store data temporarily for rapid access.
capacity expansion
Abbreviated term for array capacity expansion. The addition of physical drives to a pre-
existing drive array, and redistribution of existing logical drives and data over the enlarged
array. The size of the logical drives does not change. This feature is available only with
Compaq array controllers that have a battery backed array accelerator installed.
capacity extension
Abbreviated term for logical drive capacity extension. The enlargement of a logical drive
without disruption of data. There must be free space on the array before extension can occur.
If necessary, create free space by deleting a logical drive or by carrying out a capacity
expansion. Capacity extension can be carried out online with some operating systems.
controller duplexing
A type of fault tolerance that requires two Smart Array controllers. Each controller has its
own set of drives, and the drive sets have identical data. When one controller fails, the other
automatically takes over the servicing of requests. Controller duplexing is available only for
some operating systems.
Compaq Insight Manager
A server management utility capable of collecting, analyzing, and transmitting data about the
condition of a server. It is also useful for managing server fault conditions, monitoring server
performance, and remotely controlling, reconfiguring, or restarting your system.
Compaq Management Agents
Server-based software that transmits data about the server to SNMP-based management tools,
such as Compaq Insight Manager.
