Glossary - HP 12000 User Manual

Glossary

This glossary defines terms used in this guide or related to this product and is not a
comprehensive glossary of computer terms.
A
Accelerated A method of deduplication that uses object-level differencing technology.
deduplication See also deduplication..
appliance An intelligent device programmed to perform a single well-defined function.
Appliances differ from general-purpose computers in that their software is normally customized
for the function they perform, pre-loaded by a vendor, and not alterable by the user.
array A synonym of storage array, storage system, and virtual array. A group of disks in one or more
disk enclosures combined with controller software that presents disk storage capacity as one or
more virtual disks.
automigration The process in which the virtual tape library acts as a tape copy engine that transfers data from
virtual cartridges on disk to a physical tape library connected to the virtual tape device.
B
backup application An application used to create, manage, and monitor backups.
bandwidth Also known as data transfer rate. The amount of data that can be carried from one point to
another in a given time period.
A real communications path usually consists of a succession of links, each with its own bandwidth.
If one of these is much slower than the rest, it is said to be a bandwidth bottleneck.
C
cartridge 1) A removable storage module that contains magnetic or optical disks, magnetic tape, or memory
chips.
(2) Software emulation of the behavior and contents of a physical tape cartridge on alternate
media, such as disk, is called a virtual tape or virtual media.
See also virtual tape..
chassis A metal box that houses computer hardware.
CLI Command-line interface. An interface comprised of various commands which are used to control
operating system responses.
D
data backup The activity of copying files or databases so that they will be preserved in case of equipment
failure or other catastrophe. The retrieval of files you backed up is called restoring files.
data compression A software or hardware process that shrinks data files so that they occupy less storage space,
and can be transmitted faster and easier. Data is encoded so it takes up less storage space and
less bandwidth for transmission.
data migration The process of moving data from one storage device to another, such as migrating data from
virtual media to physical media.
data restore To recover data files stored on virtual or physical media.
data retention The length of time data is retained (stored) on virtual or physical media.
period
data striping The storing of sequential blocks of incoming data on all the different disk drives in a virtual disk.
This method of writing data increases virtual disk throughput because multiple disks are working
simultaneously, retrieving and storing data. RAID 0, 3, 5, 6, 10, and 50 use striping.
194 Glossary