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RAID (Redundant Array of Inexpensive Disks) -- A variety of configurations to use more than one disk to increase reliability, speed, and/or size of hard drives.

See also:





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  • (rhk) Common threads: Software RAID in the new Linux 2.4 kernel, Part 1: Installation and a general introduction; Daniel Robbins; Feb 2001 -- "The new 2.4 kernel is out! So it's time to track down a spare PC, put Linux on it, and see what it can do. In his two-part series on the Linux 2.4 Software RAID, Daniel Robbins introduces the new technology that's used to increase disk performance and reliability by distributing data over multiple disks. This first installment covers Software RAID setup (kernel and tools installation) and shows you how to create linear and RAID-0 volumes." -- appears to be worth reading

It was worth reading -- some of the feedback I sent him recently (12 Mar 2003) -- also mentioned that booting from RAID might be very easy now:

Thanks for writing this, it's a real help -- I will offer some feedback though:

  • I'm almost 100% certain that the probablity of failure of two disks is the product not the sum of their individual failure probabilities. (This comes up in both parts of your article.)

  • You didn't mention (AFAICT) two other potential problems, specifically those mentioned in http://tldp.org/HOWTO/Software-RAID-HOWTO-5.html (or near there) -- one the potential for corruption because RAID assumes a write is completed if it gets no error message (aside: is this any different than any other filesystem?), and the potential for data corruption due to a "temporary" multiple (disk) failure (discussed a little later, IIRC).

_HOWTOs (search at http://tldp.org/HOWTO/HOWTO-INDEX/howtos.html)_

  • Linux ATA RAID HOWTO; -- "This HOWTO document explains how to install Linux on an Intel Pentium compatible computer with an ATA RAID Controller (onboard chip or seperate card), single or multiple processors and atleast two hard disks."

  • The Software-RAID HOWTO; Jakob Østergaard -- "This HOWTO describes how to use Software RAID under Linux. ... This is the RAID layer that is the standard in Linux-2.4, and it is the version that is also used by Linux-2.2 kernels shipped from some vendors."

Recommended for Specific Needs

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Recommended by Others

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No Recommendation

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Not Recommended

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  • () RandyKramer - 25 Jul 2002
  • <If you edit this page: add your name here; move this to the next line; and include your comment marker (initials), if you have created one, in parenthesis before your WikiName.>

[[Main.RandyKramer#25 Jul 2002][]]

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Topic revision: r10 - 2003-03-14 - RandyKramer
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