Index: uspace/srv/bd/hr/parity_stripe.c
===================================================================
--- uspace/srv/bd/hr/parity_stripe.c	(revision ca212a519e7b756a1c5a2b63f186eb5ff442e7ac)
+++ uspace/srv/bd/hr/parity_stripe.c	(revision a0abd460cb2916c83ae85a2af31698be9d3674c6)
@@ -384,5 +384,6 @@
 
 		/* readers (upper bound) */
-		worker_cnt += (vol->extent_no - 1) - stripe->strips_touched;
+		worker_cnt += ((vol->extent_no - 1) - stripe->strips_touched) *
+		    stripe->range_count;
 		worker_cnt += stripe->partial_strips_touched;