143
Glossary
Definitions obtained from the Storage Networking Industry Association (SNIA)
Dictionary are indicated with “(SNIA)” at the end. For the complete SNIA
Dictionary, go to:
http://www.snia.org/education/dictionary
agent
The component of the system monitoring and diagnostic software that collects health
and asset information about the array.
alarm
A type of event that requires service action. See also event.
alert
A subtype of an event that requires user intervention. The term actionable event often
describes an alert. See also event.
array
Multiple disk drives that function as a single storage device. A high-availability (HA)
array configuration has redundant controllers and expansion trays of disk drives.
array hot-spare
A disk that serves as a hot-spare within an array as part of the storage pool; a reserve
disk that can be made available to all virtual disks within an array. See also
hot-spare.
block
The amount of data sent or received by the host per I/O operation; the size of a data
unit.