93 lines
3.7 KiB
HTML
93 lines
3.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
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<TITLE>Software-RAID HOWTO</TITLE>
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<LINK HREF="Software-RAID-0.4x-HOWTO-1.html" REL=next>
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</HEAD>
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<BODY>
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<A HREF="Software-RAID-0.4x-HOWTO-1.html">Next</A>
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Previous
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Contents
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<HR>
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<H1>Software-RAID HOWTO</H1>
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<H2>Linas Vepstas, <CODE>linas@linas.org</CODE></H2>v0.54, 21 November 1998
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<P><HR>
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<EM>RAID stands for ''Redundant Array of Inexpensive Disks'', and
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is meant to be a way of creating a fast and reliable disk-drive
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subsystem out of individual disks. RAID can guard against disk failure, and can also improve performance over that of a single disk drive.
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This document is a tutorial/HOWTO/FAQ for users of
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the Linux MD kernel extension, the associated tools, and their use.
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The MD extension implements RAID-0 (striping), RAID-1 (mirroring),
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RAID-4 and RAID-5 in software. That is, with MD, no special hardware
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or disk controllers are required to get many of the benefits of RAID.</EM>
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<HR>
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<P>
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<DL>
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<DT><B>Preamble</B><DD><P>This document is copyrighted and GPL'ed by Linas Vepstas
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(
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<A HREF="mailto:linas@linas.org">linas@linas.org</A>).
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Permission to use, copy, distribute this document for any purpose is
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hereby granted, provided that the author's / editor's name and
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this notice appear in all copies and/or supporting documents; and
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that an unmodified version of this document is made freely available.
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This document is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY, either expressed or implied. While every effort
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has been taken to ensure the accuracy of the information documented
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herein, the author / editor / maintainer assumes NO RESPONSIBILITY
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for any errors, or for any damages, direct or consequential, as a
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result of the use of the information documented herein.
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<P>
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<P><B>RAID, although designed to improve system reliability by adding
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redundancy, can also lead to a false sense of security and confidence
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when used improperly. This false confidence can lead to even greater
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disasters. In particular, note that RAID is designed to protect against
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*disk* failures, and not against *power* failures or *operator*
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mistakes. Power failures, buggy development kernels, or operator/admin
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errors can lead to damaged data that it is not recoverable!
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RAID is *not* a substitute for proper backup of your system.
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Know what you are doing, test, be knowledgeable and aware!</B>
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</DL>
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<P>
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<H2><A NAME="toc1">1.</A> <A HREF="Software-RAID-0.4x-HOWTO-1.html">Introduction</A></H2>
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<P>
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<H2><A NAME="toc2">2.</A> <A HREF="Software-RAID-0.4x-HOWTO-2.html">Understanding RAID</A></H2>
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<P>
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<H2><A NAME="toc3">3.</A> <A HREF="Software-RAID-0.4x-HOWTO-3.html">Setup & Installation Considerations</A></H2>
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<P>
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<H2><A NAME="toc4">4.</A> <A HREF="Software-RAID-0.4x-HOWTO-4.html">Error Recovery</A></H2>
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<P>
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<H2><A NAME="toc5">5.</A> <A HREF="Software-RAID-0.4x-HOWTO-5.html">Troubleshooting Install Problems</A></H2>
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<P>
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<H2><A NAME="toc6">6.</A> <A HREF="Software-RAID-0.4x-HOWTO-6.html">Supported Hardware & Software</A></H2>
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<P>
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<H2><A NAME="toc7">7.</A> <A HREF="Software-RAID-0.4x-HOWTO-7.html">Modifying an Existing Installation</A></H2>
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<P>
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<H2><A NAME="toc8">8.</A> <A HREF="Software-RAID-0.4x-HOWTO-8.html">Performance, Tools & General Bone-headed Questions</A></H2>
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<P>
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<H2><A NAME="toc9">9.</A> <A HREF="Software-RAID-0.4x-HOWTO-9.html">High Availability RAID</A></H2>
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<P>
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<H2><A NAME="toc10">10.</A> <A HREF="Software-RAID-0.4x-HOWTO-10.html">Questions Waiting for Answers</A></H2>
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<P>
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<H2><A NAME="toc11">11.</A> <A HREF="Software-RAID-0.4x-HOWTO-11.html">Wish List of Enhancements to MD and Related Software</A></H2>
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<HR>
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