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Diffstat (limited to 'chapter08/fstab.xml')
| -rw-r--r-- | chapter08/fstab.xml | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/chapter08/fstab.xml b/chapter08/fstab.xml index 026ec000c..2bf2cb2ad 100644 --- a/chapter08/fstab.xml +++ b/chapter08/fstab.xml @@ -95,4 +95,19 @@ EOF</userinput></screen> <!-- Personally, I find it more foolproof to always specify the iocharset and codepage in /etc/fstab for MS-based filesystems - Alexander E. Patrakov --> + <para>It is possible to make the ext3 filesystem reliable across power + failures for some hard disk types. To do this, add the + <option>barrier=1</option> mount option to the appropriate entry in + <filename>/etc/fstab</filename>. To check if the disk drive supports + this option, run + <ulink url="http://www.linuxfromscratch.org/blfs/view/cvs/general/hdparm.html">hdparm</ulink> + on the applicable disk drive. For example, if:</para> + +<screen><userinput>hdparm -I /dev/sda | grep NCQ</userinput></screen> + + <para>returns non-empty output, the option is supported.</para> + + <para>Note: Logical Volume Management (LVM) based partitions cannot use the + <option>barrier</option> option.</para> + </sect1> |