HP 12000 HP 12200 Gateway Virtual Library System User Guide (BW403-10001, June - Page 194

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 deduplication appliance array automigration A method of deduplication that uses object-level differencing technology. See also deduplication.. 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. 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. 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 bandwidth An application used to create, manage, and monitor backups. 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 chassis CLI 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. Command-line interface. An interface comprised of various commands which are used to control operating system responses. D data backup data compression data migration data restore data retention period data striping 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. 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. 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. 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