Some magnetic disk controllers have a cache. The working of the cache is not visible to the main CPU, but again provides a mapping of the current contents of part of the disk units in order to provide improved performance.
Some magnetic tape units have built-in cache memory. In this case the aim is to allow a streaming tape transport to emulate the behavior of a (more expensive) start-stop unit so that it can be attached to a system designed to support only the latter without substantial software modification. The arrangement was introduced by Cipher in the early 1980s.
See also disk cache.
cache / kash/ • n. a collection of items of the same type stored in a hidden or inaccessible place: an arms cache a cache of gold coins. ∎ a hidden or inaccessible storage place for valuables, provisions, or ammunition. ∎ (also cache memory) Comput. an auxiliary memory from which high-speed retrieval is possible.• v. [tr.] store away in hiding or for future use. ∎ Comput. store (data) in a cache memory. ∎ Comput. provide (hardware) with a cache memory.
a hiding place, hence, the items hidden; the stores of provisions hidden by travellers or explorers on their journeys.
Examples: cache of green boughs, 1866; of jewels; of meat, 1865; of a barrel of pork, 1842; of provisions; of silver, 1860; of treasure.