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From The Free On-line Dictionary of Computing (05 January 2017) [foldoc]:
Redundant Array of Independent Disks
(RAID) A standard naming convention
for various ways of using multiple disk drives to provide
redundancy and distributed I/O.
The original ("..Inexpensive..") term referred to the 3.5 and
5.25 inch disks used for the first RAID system but no longer
applies. As solid state drives are becoming a practical
repacement for magnetic disks, "RAID" is sometimes expanded as
"Redundant Array of Independent Drives".
The following standard RAID specifications exist:
RAID 0 Non-redundant striped array
RAID 1 Mirrored arrays
RAID 2 Parallel array with ECC
RAID 3 Parallel array with parity
RAID 4 Striped array with parity
RAID 5 Striped array with rotating parity
RAID originated in a project at the computer science
department of the University of California at Berkeley,
under the direction of Professor Katz, in conjunction with
Professor John Ousterhout and Professor David Patterson.
A prototype disk array file server with a capacity of 40
GBytes and a sustained bandwidth of 80 MBytes/second was
interfaced to a 1 Gb/s local area network. It was planned
to extend the storage array to include automated {optical
disks} and magnetic tapes.
(ftp://wuarchive.wustl.edu/doc/techreports/berkeley.edu/raid/raidPapers).
http://HTTP.CS.Berkeley.EDU/projects/parallel/research_summaries/14-Computer-Architecture/.
["A Case for Redundant Arrays of Inexpensive Disks (RAID)",
"D. A. Patterson and G. Gibson and R. H. Katz", Proc ACM
SIGMOD Conf, Chicago, IL, Jun 1988].
["Introduction to Redundant Arrays of Inexpensive Disks
(RAID)", "D. A. Patterson and P. Chen and G. Gibson and
R. H. Katz", IEEE COMPCON 89, San Francisco, Feb-Mar 1989].
(2012-08-26)