virtual tape system

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virtual tape system

A peripheral unit that combines a disk cache and tape library to improve performance and eliminate cartridge waste. Also called a "virtual tape server," data intended for tape are written to the disk cache and later written to tape in the background. If a tape is read frequently, a certain amount of its data is held in the cache, which greatly improves access times over the slow loading process of a robotic library.

Tape files, no matter how small, are typically stored on one cartridge. A virtual tape system (VTS) provides volume stacking, which stores multiple files on a single volume. The virtual tape system indexes the files and manages them, dramatically improving cartridge efficiency. See virtual tape library.
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References in periodicals archive ?
eMag's advancement provides the ability to quickly and inexpensively access this data." eMag Solutions is able to support mainframe environments operating Sun/Storagetek Virtual Storage Manager (VSM) as well as IBM's Virtual Tape Server (VTS).
A virtual tape library (VTL), sometimes referred to as virtual tape server (VTS), offers storage to a disk cache, which acts as a fast writing buffer.
Storage systems, software, services and technology company IBM has introduced a new tape drive and virtual tape server enhancements.
ibm.com) TotalStorage Peer-to-Peer Virtual Tape Server. For DWP, the system improves data integrity, increases system efficiency and decreases employee time spent on maintaining backup tapes.
IBM has announced new enterprise storage products and enhancements including FICON support for IBM's TotalStorage Enterprise Storage Server (code named Shark) and two models of IBM's TotalStorage Virtual Tape Server (VTS) that for the first time incorporate IBM's patented copper chip technology.
VSM was introduced last year, a full year later than IBM Corp's competing Magstar Virtual Tape Server.
IBM's 3494 enterprise tape library supports Virtual Tape Server (VTS), which uses virtual drives of RAID-5 disk arrays to cache data and archive it to tape.
It claims to have shipped 45,000 of the mainframe-oriented 3950s, including 5,500 into its Virtual Tape Server which includes tape, disk and ADSM in a box.
The programming for a virtual tape system is sometimes called a virtual tape server (VTS).

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