155 lines
7.1 KiB
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155 lines
7.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<META NAME="GENERATOR" CONTENT="LinuxDoc-Tools 0.9.21">
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<TITLE>The Software-RAID HOWTO</TITLE>
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<LINK HREF="Software-RAID-HOWTO-1.html" REL=next>
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</HEAD>
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<BODY>
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<A HREF="Software-RAID-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>The Software-RAID HOWTO</H1>
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<H2>Jakob Østergaard <CODE>
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<A HREF="mailto:jakob@unthought.net">jakob@unthought.net</A></CODE>
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and Emilio Bueso <CODE>
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<A HREF="mailto:bueso@vives.org">bueso@vives.org</A></CODE></H2>v.1.1.1 2010-03-06
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<HR>
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<EM><B>This HOWTO is deprecated; the Linux RAID HOWTO is maintained as a wiki by the
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linux-raid community at
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<A HREF="http://raid.wiki.kernel.org/">http://raid.wiki.kernel.org/</A></B></EM>
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<HR>
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<P>This HOWTO describes how to use Software RAID under Linux. It
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addresses a specific version of the Software RAID layer, namely the
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0.90 RAID layer made by Ingo Molnar and others. This is the RAID layer
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that is the standard in Linux-2.4, and it is the version that is also
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used by Linux-2.2 kernels shipped from some vendors. The 0.90 RAID
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support is available as patches to Linux-2.0 and Linux-2.2, and is by
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many considered far more stable that the older RAID support already in
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those kernels.
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</P>
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<P>
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<H2><A NAME="toc1">1.</A> <A HREF="Software-RAID-HOWTO-1.html">Introduction</A></H2>
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<UL>
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<LI><A NAME="toc1.1">1.1</A> <A HREF="Software-RAID-HOWTO-1.html#ss1.1">Disclaimer</A>
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<LI><A NAME="toc1.2">1.2</A> <A HREF="Software-RAID-HOWTO-1.html#ss1.2">What is RAID?</A>
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<LI><A NAME="toc1.3">1.3</A> <A HREF="Software-RAID-HOWTO-1.html#ss1.3">Terms</A>
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<LI><A NAME="toc1.4">1.4</A> <A HREF="Software-RAID-HOWTO-1.html#ss1.4">The RAID levels</A>
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<LI><A NAME="toc1.5">1.5</A> <A HREF="Software-RAID-HOWTO-1.html#ss1.5">Requirements</A>
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</UL>
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<P>
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<H2><A NAME="toc2">2.</A> <A HREF="Software-RAID-HOWTO-2.html">Why RAID?</A></H2>
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<UL>
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<LI><A NAME="toc2.1">2.1</A> <A HREF="Software-RAID-HOWTO-2.html#ss2.1">Device and filesystem support</A>
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<LI><A NAME="toc2.2">2.2</A> <A HREF="Software-RAID-HOWTO-2.html#ss2.2">Performance</A>
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<LI><A NAME="toc2.3">2.3</A> <A HREF="Software-RAID-HOWTO-2.html#ss2.3">Swapping on RAID</A>
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<LI><A NAME="toc2.4">2.4</A> <A HREF="Software-RAID-HOWTO-2.html#ss2.4">Why mdadm?</A>
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</UL>
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<P>
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<H2><A NAME="toc3">3.</A> <A HREF="Software-RAID-HOWTO-3.html">Devices</A></H2>
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<UL>
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<LI><A NAME="toc3.1">3.1</A> <A HREF="Software-RAID-HOWTO-3.html#ss3.1">Spare disks</A>
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<LI><A NAME="toc3.2">3.2</A> <A HREF="Software-RAID-HOWTO-3.html#ss3.2">Faulty disks</A>
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</UL>
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<P>
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<H2><A NAME="toc4">4.</A> <A HREF="Software-RAID-HOWTO-4.html">Hardware issues</A></H2>
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<UL>
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<LI><A NAME="toc4.1">4.1</A> <A HREF="Software-RAID-HOWTO-4.html#ss4.1">IDE Configuration</A>
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<LI><A NAME="toc4.2">4.2</A> <A HREF="Software-RAID-HOWTO-4.html#ss4.2">Hot Swap</A>
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</UL>
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<P>
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<H2><A NAME="toc5">5.</A> <A HREF="Software-RAID-HOWTO-5.html">RAID setup</A></H2>
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<UL>
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<LI><A NAME="toc5.1">5.1</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.1">General setup</A>
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<LI><A NAME="toc5.2">5.2</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.2">Downloading and installing the RAID tools</A>
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<LI><A NAME="toc5.3">5.3</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.3">Downloading and installing mdadm </A>
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<LI><A NAME="toc5.4">5.4</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.4">Linear mode</A>
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<LI><A NAME="toc5.5">5.5</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.5">RAID-0</A>
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<LI><A NAME="toc5.6">5.6</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.6">RAID-1</A>
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<LI><A NAME="toc5.7">5.7</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.7">RAID-4</A>
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<LI><A NAME="toc5.8">5.8</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.8">RAID-5</A>
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<LI><A NAME="toc5.9">5.9</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.9">The Persistent Superblock</A>
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<LI><A NAME="toc5.10">5.10</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.10">Chunk sizes</A>
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<LI><A NAME="toc5.11">5.11</A> <A HREF="Software-RAID-HOWTO-5.html#ss5.11">Options for mke2fs</A>
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</UL>
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<P>
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<H2><A NAME="toc6">6.</A> <A HREF="Software-RAID-HOWTO-6.html">Detecting, querying and testing</A></H2>
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<UL>
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<LI><A NAME="toc6.1">6.1</A> <A HREF="Software-RAID-HOWTO-6.html#ss6.1">Detecting a drive failure</A>
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<LI><A NAME="toc6.2">6.2</A> <A HREF="Software-RAID-HOWTO-6.html#ss6.2">Querying the arrays status</A>
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<LI><A NAME="toc6.3">6.3</A> <A HREF="Software-RAID-HOWTO-6.html#ss6.3">Simulating a drive failure</A>
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<LI><A NAME="toc6.4">6.4</A> <A HREF="Software-RAID-HOWTO-6.html#ss6.4">Simulating data corruption</A>
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<LI><A NAME="toc6.5">6.5</A> <A HREF="Software-RAID-HOWTO-6.html#ss6.5">Monitoring RAID arrays</A>
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</UL>
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<P>
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<H2><A NAME="toc7">7.</A> <A HREF="Software-RAID-HOWTO-7.html">Tweaking, tuning and troubleshooting</A></H2>
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<UL>
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<LI><A NAME="toc7.1">7.1</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.1"><CODE>raid-level</CODE> and <CODE>raidtab</CODE></A>
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<LI><A NAME="toc7.2">7.2</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.2">Autodetection</A>
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<LI><A NAME="toc7.3">7.3</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.3">Booting on RAID</A>
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<LI><A NAME="toc7.4">7.4</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.4">Root filesystem on RAID</A>
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<LI><A NAME="toc7.5">7.5</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.5">Making the system boot on RAID</A>
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<LI><A NAME="toc7.6">7.6</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.6">Converting a non-RAID RedHat System to run on Software RAID</A>
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<LI><A NAME="toc7.7">7.7</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.7">Sharing spare disks between different arrays</A>
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<LI><A NAME="toc7.8">7.8</A> <A HREF="Software-RAID-HOWTO-7.html#ss7.8">Pitfalls</A>
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</UL>
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<P>
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<H2><A NAME="toc8">8.</A> <A HREF="Software-RAID-HOWTO-8.html">Reconstruction</A></H2>
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<UL>
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<LI><A NAME="toc8.1">8.1</A> <A HREF="Software-RAID-HOWTO-8.html#ss8.1">Recovery from a multiple disk failure</A>
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</UL>
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<P>
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<H2><A NAME="toc9">9.</A> <A HREF="Software-RAID-HOWTO-9.html">Performance</A></H2>
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<UL>
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<LI><A NAME="toc9.1">9.1</A> <A HREF="Software-RAID-HOWTO-9.html#ss9.1">RAID-0</A>
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<LI><A NAME="toc9.2">9.2</A> <A HREF="Software-RAID-HOWTO-9.html#ss9.2">RAID-0 with TCQ</A>
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<LI><A NAME="toc9.3">9.3</A> <A HREF="Software-RAID-HOWTO-9.html#ss9.3">RAID-5</A>
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<LI><A NAME="toc9.4">9.4</A> <A HREF="Software-RAID-HOWTO-9.html#ss9.4">RAID-10</A>
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<LI><A NAME="toc9.5">9.5</A> <A HREF="Software-RAID-HOWTO-9.html#ss9.5">Fresh benchmarking tools</A>
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</UL>
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<P>
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<H2><A NAME="toc10">10.</A> <A HREF="Software-RAID-HOWTO-10.html">Related tools</A></H2>
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<UL>
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<LI><A NAME="toc10.1">10.1</A> <A HREF="Software-RAID-HOWTO-10.html#ss10.1">RAID resizing and conversion</A>
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<LI><A NAME="toc10.2">10.2</A> <A HREF="Software-RAID-HOWTO-10.html#ss10.2">Backup</A>
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</UL>
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<P>
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<H2><A NAME="toc11">11.</A> <A HREF="Software-RAID-HOWTO-11.html">Partitioning RAID / LVM on RAID</A></H2>
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<UL>
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<LI><A NAME="toc11.1">11.1</A> <A HREF="Software-RAID-HOWTO-11.html#ss11.1">Partitioning RAID devices</A>
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<LI><A NAME="toc11.2">11.2</A> <A HREF="Software-RAID-HOWTO-11.html#ss11.2">LVM on RAID</A>
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</UL>
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<P>
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<H2><A NAME="toc12">12.</A> <A HREF="Software-RAID-HOWTO-12.html">Credits</A></H2>
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<P>
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<H2><A NAME="toc13">13.</A> <A HREF="Software-RAID-HOWTO-13.html">Changelog</A></H2>
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<UL>
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<LI><A NAME="toc13.1">13.1</A> <A HREF="Software-RAID-HOWTO-13.html#ss13.1">Version 1.1</A>
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</UL>
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<HR>
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<A HREF="Software-RAID-HOWTO-1.html">Next</A>
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Contents
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