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Article #11959Info on RAID drives
From: Greg Hennessy
Date: Thu, 06 Jun 1991 02:33
Date: Thu, 06 Jun 1991 02:33
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I have been seeing references to RAID drives, which I understand to be arrays of SCSI (or similar) drives arranged together to improve I/O performance by having two or more drives reading or writing the data at the same time (striping). The most recent Byte has a blurb about NCR about to release a chip set that allows RAID-1, RAID-3, and RAID-5. The blurb implied that RAID-1 was simple disk mirroring. Can anyone explain what the other levels are? How much of an increase on I/O bandwidth can be expected? -- -Greg Hennessy, University of Virginia USPS Mail: Astronomy Department, Charlottesville, VA 22903-2475 USA Internet: gsh7w@virginia.edu UUCP: ...!uunet!virginia!gsh7w
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!ncar!gatech!purdue!haven.umd.edu!uvaarpa!murdoch!usenetShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!ncar!gatech!purdue!haven.umd.edu!uvaarpa!murdoch!usenet From: gsh7w@astsun.astro.Virginia.EDU (Greg Hennessy) Newsgroups: comp.arch Subject: Info on RAID drives Message-ID: <1991Jun6.023344.12363@murdoch.acc.Virginia.EDU> Date: 6 Jun 91 02:33:44 GMT Sender: usenet@murdoch.acc.Virginia.EDU Organization: University of Virginia Lines: 15