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| author | John Fieber <jfieber@FreeBSD.org> | 1997-11-28 21:48:46 +0000 |
|---|---|---|
| committer | John Fieber <jfieber@FreeBSD.org> | 1997-11-28 21:48:46 +0000 |
| commit | bb176de47ccde8bf10a363d5d326b538c1c30248 (patch) | |
| tree | c60ec8b709a40aca474344591d3c02f849bc5249 /en | |
| parent | 8b92d5797e024be91a7d5546c262b2bd61b10788 (diff) | |
| download | doc-bb176de47ccde8bf10a363d5d326b538c1c30248.tar.gz doc-bb176de47ccde8bf10a363d5d326b538c1c30248.zip | |
Added section on creating ccd(4) volumes. Commands submitted by Stan
Brown (stanb@awod.com).
Submitted by: Doug White <dwhite@resnet.uoregon.edu>
Notes
Notes:
svn path=/head/; revision=2226
Diffstat (limited to 'en')
| -rw-r--r-- | en/tutorials/diskformat/diskformat.docb | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/en/tutorials/diskformat/diskformat.docb b/en/tutorials/diskformat/diskformat.docb index 996485f694..8ce5ce5039 100644 --- a/en/tutorials/diskformat/diskformat.docb +++ b/en/tutorials/diskformat/diskformat.docb @@ -1,5 +1,5 @@ <!DOCTYPE BOOK PUBLIC "-//Davenport//DTD DocBook V3.0//EN"> -<!-- $Id: diskformat.docb,v 1.3 1997-09-20 05:34:02 jfieber Exp $ --> +<!-- $Id: diskformat.docb,v 1.4 1997-11-28 21:48:46 jfieber Exp $ --> <book> <bookinfo> @@ -384,6 +384,52 @@ mount /dev/wd2 /usr/home </informalexample> </para> </sect1> + +<sect1> +<title>Creating Striped Disks using CCD</title> +<para>Commands Submitted By: Stan Brown (<email>stanb@awod.com</email>) </para> + +<para> +The Concatenated Disk Driver, or CCD, allows you to treat several identical disks as a single disk. +Striping can result in increased disk performance by distributing reads and +writes across the disks. See the ccd(4) and ccdconfig(4) man pages or the +<ulink URL="http://stampede.cs.berkeley.edu/ccd/">CCD Homepage</ulink> for further details.</para> + +<para>To create a new CCD, execute the following commands. This describes +how to add three disks together; simply add or remove devices as +necessary. Remember that the disks to be striped must be <emphasis>identical.</></para> + +<para>Before executing these commands, make sure you add the line +<userinput> +pseudo-device ccd 4 +</userinput> + +to your kernel.</para> + +<informalexample> +<screen> +<userinput> +cd /dev ; sh MAKDEV ccd0 + +disklabel -r -w sd0 auto +disklabel -r -w sd1 auto +disklabel -r -w sd2 auto + +disklabel -e sd0c # change type to 4.2BSD +disklabel -e sd1c # change type to 4.2BSD +disklabel -e sd2c # change type to 4.2BSD + +ccdconfig ccd0 32 0 /dev/sd0c /dev/sd2c /dev/sd2c + +newfs /dev/rccd0c +</userinput> +</screen> +</informalexample> + +<para>Now you can mount and use your CCD by referencing device /dev/ccd0c. +</para> + +</sect1> </chapter> <chapter> |