A disk enclosure is a computer storage device designed to contain disk drives. The term is normally used to differentiate such a device from a more advanced disk array which contains a disk array controller and supports redundant array of independent disks. Therefore, a disk enclosure is a simple container, sometimes with a power supply, but very little intelligence.

Many disk enclosures are small portable devices that use USB, FireWire, or a special external version of Serial ATA to connect to a computer. In enterprise storage, the term normally refers to a device which can hold a number of disk drives (normally 4 or more) and which communicates with a server using the SCSI or fibre channel protocols.

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