HP StorageWorks 8000, User Manual

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251 HP StorageWorks NAS 8000 User’s Guide
glossary
Glossary
Glossary
This glossary defines terms used in this guide or related to this product.
Access Control List (ACL)
A persistent list that enumerates the rights of principals (e.g., users and groups of users) to access
resources. Often used in file system context to denote a persistent list maintained by a file system
and defining user and group permissions for file and directory access.
Active spare
An 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 an 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
On the HP-UX, 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.