OS-14 sd attach should not issue potentially slow scsi commands (ddi-forceattach=1)

@@ -33,5 +33,11 @@
 
 #
 # Associate the driver with devid resolution.
 #
 ddi-devid-registrant=1;
+
+#
+# Force attach to avoid timing problems with deferred attach 
+# and tools like format(1M).
+#  
+ddi-forceattach=1;