Glossary, Glossary 223 – HP StorageWorks 8000 NAS User Manual

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Glossary 223

Glossary

Access Control List

(ACL)

A list associated with a file that contains information about which users or

groups have permission to access or modify the file.

Active spare

A previously installed physical drive used as a backup in case an assigned

drive fails. The active spare automatically takes over the duties of the failed

drive.

Agent

A program that performs a background task for a user and reports to the user

when the task is done or some expected event has taken place. The NAS

server uses backup agents to back up data remotely.

Aggregation

The combining of multiple similar or related operations into a single one.

Authentication

The process of matching credentials provided by the user against an

equivalent entry on the SAM database. A user's name and password are

compared against an authorized list and if the system detects a match, access

is granted to the extent specified in the permission list for that user.

AutoRAID

AutoRAID implements RAID technology automatically without requiring you to

know all the complexities of determining and setting up different RAID modes.

AutoRAID is an advanced array storage technology that provides the best

combination of cost, performance, and availability.

Bond channel

A failover mechanism that automatically switches a specific NIC port to a

standby network upon the failure or abnormal termination of the currently

active system.

Broadcast address

The address that can be used to send messages to all machines on the subnet.

Applying the subnet mask to the IP address provides the subnet.