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{{Short description|Device that manages disk drives}}
A '''disk array controller''' is a device that manages the physical [[disk drives]] and presents them to the computer as [[Logical Unit Number|logical units]]. It almost always implements [[RAID#Hardware-based|hardware]] [[RAID]], thus it is sometimes referred to as '''RAID controller'''. It also often provides additional disk [[cache (computing)|cache]].
''Disk array controller'' is often improperly shortened to ''[[disk controller]]''. The two should not be confused as they provide very different functionality.
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