diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 11ee835..dec27a9 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -35,7 +35,13 @@
 	int 	heads;
 	int	sectors;
 	int 	cylinders;
-	int	raid_level;
+	int	raid_level; /* set to -1 to indicate that
+			     * the drive is not in use/configured
+			    */
+	int	busy_configuring; /*This is set when the drive is being removed
+				   *to prevent it from being opened or it's queue
+				   *from being started.
+				  */
 } drive_info_struct;
 
 struct ctlr_info