--- monitorix.orig	2012-09-19 19:10:51.216974158 +0100
+++ monitorix	2012-09-19 19:32:41.617971604 +0100
@@ -2293,8 +2293,14 @@
 					}
 				}
 			} elsif($os eq "FreeBSD" || $os eq "OpenBSD" || $os eq "NetBSD") {
-				$d =~ s/^.*dev\///;	# remove the /dev/ prefix
-				$d =~ s/^(...).*/\1/;	# get the first 3 chars
+				# remove the /dev/ prefix
+				if ($d =~ s/^.*dev\///) {
+					# not ZFS; get the device name, eg ada0; md0; ad10
+					$d =~ s/^(\D+\d*)\D.*/\1/;	
+				} else {
+					# Just take ZFS pool name
+					$d =~ s,^([^/]*)/.*,\1,;
+				}
 			}
 			$FS_DEV{$fs} = $d;
 			logger("$myself: Detected physical device name for $fs in '$d'.") unless !$opt_d;