Date: Sun, 10 Nov 2013 18:37:20 +0000 (UTC) From: Benedict Reuschling <bcr@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-projects@freebsd.org Subject: svn commit: r43152 - projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs Message-ID: <201311101837.rAAIbKd2086323@svn.freebsd.org>
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Author: bcr Date: Sun Nov 10 18:37:20 2013 New Revision: 43152 URL: http://svnweb.freebsd.org/changeset/doc/43152 Log: Provide a big fat warning message for those people who think disabling checksums on a ZFS pool is a good idea. Modified: projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Modified: projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml ============================================================================== --- projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Sun Nov 10 14:44:46 2013 (r43151) +++ projects/zfsupdate-201307/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Sun Nov 10 18:37:20 2013 (r43152) @@ -459,12 +459,17 @@ errors: No known data errors</screen> <screen>&prompt.root; <userinput>zfs set checksum=off storage/home</userinput></screen> - <para>Doing so is <emphasis>not</emphasis> recommended. - Checksums take very little storage space and provide - data integrity. Checksum verification is - known as <quote>scrubbing</quote>. Verify the data - integrity of the <literal>storage</literal> pool, with this - command:</para> + <warning> + <para>Doing so is <emphasis>not</emphasis> recommended! + Checksums take very little storage space and provide data + integrity. Many ZFS features will not work properly with + checksums disabled. There is also no noticeable performance + gain from disabling these checksums.</para> + </warning> + + <para>Checksum verification is known as <quote>scrubbing</quote>. + Verify the data integrity of the <literal>storage</literal> + pool, with this command:</para> <screen>&prompt.root; <userinput>zpool scrub storage</userinput></screen>
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