Glossary - HP StorageWorks 300 - Virtual Library System EVA Gateway 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.
appliance
automigration
bandwidth
cartridge
chassis
command line
interface (CLI)
data backup
data compression
data migration
data restore
data retention pe-
riod
disk array
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.
Data intended for tape storage is written to virtual tape and after the backups are
complete written to physical tape in the background. One virtual tape emulates
one physical tape to the host system. Data is held on the virtual tape, which
greatly improves restore times over the slow loading process of a robotic library.
The VLS will be able to perform automigration in the future.
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.
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.
A metal box that houses computer hardware.
A user interface to an application that accepts typed-in commands one line at a
time typically through a console screen.
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.
See also data restore.
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.
See also bandwidth.
The process of moving data from one storage device to another, such as
migrating data from virtual media to physical media.
To recover data files stored on virtual or physical media.
The length of time data is retained (stored) on virtual or physical media.
Two or more hard drives combined as a single logical unit for increased
capacity, speed, and/or fault-tolerant operation. Disk arrays are logically
grouped into a storage pool.
See also storage pool.
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