--- linux/drivers/ide/raid/ataraid.c.orig	2004-07-13 23:45:21.000000000 -0400
+++ linux/drivers/ide/raid/ataraid.c	2004-07-26 18:52:21.000000000 -0400
@@ -34,7 +34,8 @@
 
 #include "ataraid.h"
 
-                                        
+#define BH_IOFailure (BH_PrivateStart + 5) /* jbd.h uses +0 to +4 */
+
 static int ataraid_hardsect_size[256];
 static int ataraid_blksize_size[256];
 
@@ -153,7 +154,17 @@ void ataraid_end_request(struct buffer_h
 	if (private==NULL)
 		BUG();
 
+	if (!uptodate) { 
+		set_bit(BH_IOFailure, &private->parent->b_state);
+		printk(KERN_ERR "ataraid: IO error on major %d minor %d\n",
+		       MAJOR(bh->b_rdev), MINOR(bh->b_rdev));
+	}		       
+	
 	if (atomic_dec_and_test(&private->count)) {
+		if (test_bit(BH_IOFailure, &private->parent->b_state)) {
+			uptodate = 0; /* fail the completed original I/O */
+			clear_bit(BH_IOFailure, &private->parent->b_state);
+		}
 		private->parent->b_end_io(private->parent,uptodate);
 		private->parent = NULL;
 		kfree(private);
@@ -194,6 +205,8 @@ static void ataraid_split_request(reques
 
 	bh2->b_data +=  bh->b_size/2;
 
+	clear_bit(BH_IOFailure, &bh->b_state); /* this bit tracks success */
+
 	generic_make_request(rw,bh1);
 	generic_make_request(rw,bh2);
 }