Editing Cache (computing) (section)

===Disk cache===
While CPU caches are generally managed entirely by hardware, a variety of software manages other caches. The [[page cache]] in main memory is managed by the [[operating system kernel]].

While the [[disk buffer]], which is an integrated part of the hard disk drive or solid state drive, is sometimes misleadingly referred to as ''disk cache'', its main functions are write sequencing and read prefetching. High-end [[disk controller]]s often have their own on-board cache for the hard disk drive's data blocks.

Finally, a fast local hard disk drive can also cache information held on even slower data storage devices, such as remote servers ([[web cache]]) or local [[tape drive]]s or [[optical jukebox]]es; such a scheme is the main concept of [[hierarchical storage management]]. Also, fast flash-based solid-state drives (SSDs) can be used as caches for slower rotational-media hard disk drives, working together as [[hybrid drive]]s.