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-rw-r--r--doc/src/sgml/wal.sgml2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml
index 1d1924bc8df..0afb9d6af60 100644
--- a/doc/src/sgml/wal.sgml
+++ b/doc/src/sgml/wal.sgml
@@ -73,7 +73,7 @@
<para>
On <productname>Linux</>, IDE drives can be queried using
<command>hdparm -I</command>; write caching is enabled if there is
- a <literal>*</> next to <literal>Write cache</>. <command>hdparm -W</>
+ a <literal>*</> next to <literal>Write cache</>. <command>hdparm -W 0</>
can be used to turn off write caching. SCSI drives can be queried
using <ulink url="http://sg.danny.cz/sg/sdparm.html"><application>sdparm</></ulink>.
Use <command>sdparm --get=WCE</command> to check