General English


  • noun
    (written as RAID)
    a fast, fault tolerant disk drive system that uses multiple drives which would, typically, each store one byte of a word of data, so allowing the data to be saved faster.


  • (written as RAID)
    A storage unit consisting of multiple hard disks among which data is distributed, for increased performance, fault-tolerance, and data backup. A RAID employs disk striping to improve performance, and may also provide disk mirroring and error correction for fault-tolerance and data recovery. Such a disk array has a single controller and array manager. Used, for instance, in network servers. Also called RAID array, or RAID disk array.
  • (written as RAID)
    A method of data storage utilizing a RAID (1).


  • noun a military operation in which a small force enters enemy territory in order to cause casualties, destroy equipment or take prisoners, and then withdraws back to its own lines again
  • verb to carry out a raid

Origin & History of “raid”

Raid and road are doublets – that is to say, they have a common ancestor, but have diverged over the centuries. In this case the ancestor was Old English rād ‘riding’, hence ‘hostile incursion on horse-back’, a relative of ride. south of the border this developed to road, and lost its predatory connotations (although they are preserved in inroads), but in Scottish English it became raid. This had more or less died out by the end of the 16th century, but Sir Walter Scott revived it at the beginning of the 19th century, and it has gone from strength to strength ever since.