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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
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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
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