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 FreeBSD, IDE drives can be queried using
         atacontrol and write caching turned off using
         hw.ata.wc=0 in /boot/loader.conf;
-        SCSI drives use sdparm.
+        SCSI drives can be queried using camcontrol identify,
+        and the write cache both queried and changed using
+        sdparm when available.