Redundant Arrays of Independent Disks
     
         (RAID.  Originally "Redundant Arrays
        of Inexpensive Disks") 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.
     
        The project is reaching its culmination with the
        implementation of a prototype disk array file server with a
        capacity of 40 GBytes and a sustained bandwidth of 80
        MBytes/second.  The server is being interfaced to a 1 Gb/s
        local area network.  A new initiative, which is part of the
        Sequoia 2000 Project, seeks to construct a geographically
        distributed storage system spanning disk arrays and automated
        libraries of optical disks and tapes.  The project will
        extend the interleaved storage techniques so successfully
        applied to disks to tertiary storage devices.  A key element
        of the research will be to develop techniques for managing
        latency in the I/O and network paths.
     
        The original ("..Inexpensive..") term referred to the 3.5 and
        5.25 inch disks used for the first RAID system but no longer
        applies.
     
        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
     
       
     (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].
     
        (1995-07-20)