Dell PowerEdge RAID Controller H700 - Manual (Page 162)

162 Glossary
Enclosure Management
Intelligent monitoring of the disk subsystem by software and/or hardware.
The disk subsystem can be part of the host system or can reside in an external
disk enclosure. Enclosure management helps you stay informed of events in
the disk subsystem, such as a physical disk or power supply failure.
Enclosure management increases the fault tolerance of the disk subsystem.
Encrypt
The act of obfuscating data on a media component through an algorithm that
relies on an encryption key.
Encrypted
State of an encryption-enabled media component indicating that its data has
been obfuscated using an algorithm that relies on an encryption key.
Encryption Capable
Indicates that a component can be encrypted.
Encryption Enabled/Disabled
Indicates wether an encryption capable media component is encrypted.
Encryption Key
The key used to obfuscate the data in an encryption enabled media
component.
Exclusive-OR
A Boolean operation used to create a parity bit that can be used to restore data
affected by a damaged file or failed physical disk. The management utility
compares data from two physical disks and creates a parity bit that is stored on a
third physical disk. This operation is used for RAID levels that use parity bits,
such as RAID 5, which used distributed parity. Also known as X-OR.
PERC7.2_UG.book Page 162 Thursday, March 3, 2011 2:14 PM