Disk block

The unit on which data is stored and retrieved on a disk with a fixed block architecture.

Disk cache

Is a mechanism that improves the time it takes to read from or write to a hard disk. It is usually included as part of the hard disk.

Disk striping

A technique that spreads data over multiple disk drives. It quickly retrieves data from disk storage. The computer system breaks a body of data into units and spreads these units across the available disks.