--- ata-raid.c.orig	Thu Oct 13 10:15:48 2005
+++ ata-raid.c	Wed Dec 14 20:06:18 2005
@@ -460,7 +460,9 @@
 
 			if ((composite = ata_alloc_composite())) {
 			    if ((mirror = ata_alloc_request())) {
-				rdp->rebuild_lba = blk + chunk;
+				if ((blk <= rdp->rebuild_lba) &&
+				    ((blk + chunk) > rdp->rebuild_lba))
+				    rdp->rebuild_lba = blk + chunk;
 				bcopy(request, mirror,
 				      sizeof(struct ata_request));
 				mirror->this = this;