--- linux/drivers/ide/raid/ataraid.c.orig	2004-07-13 23:45:21.000000000 -0400
+++ linux/drivers/ide/raid/ataraid.c	2004-07-13 23:45:32.000000000 -0400
@@ -153,7 +153,14 @@ void ataraid_end_request(struct buffer_h
 	if (private==NULL)
 		BUG();
 
+	if (!uptodate) /* record failures of components of the original I/O */
+		set_bit(BH_PrivateStart, &private->parent->b_state);
+	
 	if (atomic_dec_and_test(&private->count)) {
+		if (test_bit(BH_PrivateStart, &private->parent->b_state)) {
+			uptodate = 0; /* fail the completed original I/O */
+			clear_bit(BH_PrivateStart, &private->parent->b_state);
+		}
 		private->parent->b_end_io(private->parent,uptodate);
 		private->parent = NULL;
 		kfree(private);
@@ -194,6 +201,8 @@ static void ataraid_split_request(reques
 
 	bh2->b_data +=  bh->b_size/2;
 
+	clear_bit(BH_PrivateStart, &bh->b_state); /* this bit tracks success */
+
 	generic_make_request(rw,bh1);
 	generic_make_request(rw,bh2);
 }