In computer storage, a tape library, sometimes called a tape silo, tape robot or tape jukebox, is a storage device which contains one or more tape drives, a number of slots to hold tape cartridges, a barcode reader to identify tape cartridges and an automated method for loading tapes (a robot). One of the earliest examples was the IBM 3850 Mass Storage System (MSS), announced in 1974.
These devices can store immense amounts of data, currently ranging from 20 terabytes up to more than 411 petabytes of data or multiple thousand times the capacity of a typical hard drive and well in excess of capacities achievable with network attached storage. Typical entry-level solutions cost around $10,000 USD, while high-end solutions can start at as much as $200,000 USD and cost well in excess of $1 million for a fully expanded and configured library. For large data-storage, they are a cost-effective solution, with cost per gigabyte as low as 10 cents USD, or at least 60% less than most hard drives, and they also provide systematic access to very large quantities of data. The tradeoff for their larger capacity is their slower access time, which usually involves mechanical manipulation of tapes. Access to data in a library takes from several seconds to several minutes.
Because of their slow sequential access and huge capacity, tape libraries are primarily used for backups and as the final stage of digital archiving. A typical application of the latter would be an organization's extensive transaction record for legal or auditing purposes. Another example is hierarchical storage management (HSM), in which tape library is used to hold rarely used files from file systems.
Other articles related to "tape, tape library":
... a data storage medium or device, such as a hard drive, tape drive, floppy disk, CD/DVD/BD, or USB flash drive ... For example, backing up 4 PCs to a single tape drive at once ... For example, backing up a single database to 4 tape drives at once ...
... Smaller tape libraries with only one drive are known as autoloaders ... The term autoloader is also sometimes used synonymously with stacker, a device in which the media is loaded necessarily in a sequential manner ...
... The promotion's classic tape library is currently controlled by World Wrestling Entertainment obtained through their purchase of World Championship Wrestling ...
... WWE currently controls Stampede's extensive tape library. ...
Famous quotes containing the words library and/or tape:
“I view askance a book that remains undisturbed for a year. Oughtnt it to have a ticket of leave? I think I may safely say no book in my library remains unopened a year at a time, except my own works and Tennysons.”
—Carolyn Wells (18621942)
“I could buy one
Tape and get another free. I accept- Ed the deal, paid for one tape and
Chose a free one. But since Ive been
Repeatedly billed for my free tape.”
—John Ashbery (b. 1927)