Improve documentation of how to fiddle with SCSI drives on FreeBSD.

Per suggestions from Achilleas Mantzios and Greg Smith.

diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml
index 4d111903a76fd7d8a370d080433f55602d02d901..ff825eca3b8f8a20afbbe523c14cf06a9f5122fe 100644 (file)
--- a/doc/src/sgml/wal.sgml
+++ b/doc/src/sgml/wal.sgml
@@ -87,7 +87,9 @@
         On <productname>FreeBSD</>, IDE drives can be queried using
         <command>atacontrol</command> and write caching turned off using
         <literal>hw.ata.wc=0</> in <filename>/boot/loader.conf</>;
-        SCSI drives use <command>sdparm</command>.
+        SCSI drives can be queried using <command>camcontrol identify</command>,
+        and the write cache both queried and changed using
+        <command>sdparm</command> when available.
       </para>
     </listitem>