Update documentation on FreeBSD write cache control.

diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml
index 96d4916e0e9cd7558a87c9fd69e279566643f1bc..4d111903a76fd7d8a370d080433f55602d02d901 100644 (file)
--- a/doc/src/sgml/wal.sgml
+++ b/doc/src/sgml/wal.sgml
@@ -85,8 +85,9 @@
     
       
         On FreeBSD, IDE drives can be queried using
-        atacontrol, and SCSI drives using
-        sdparm.
+        atacontrol and write caching turned off using
+        hw.ata.wc=0 in /boot/loader.conf;
+        SCSI drives use sdparm.