--- a/linux-2.6.10/drivers/md/md.c	2005-01-15 07:52:14.000000000 -0600
+++ b/linux-2.6.10/drivers/md/md.c	2005-01-15 07:52:14.000000000 -0600
@@ -939,9 +939,13 @@
 		sb->resync_offset = cpu_to_le64(0);
 
 	max_dev = 0;
-	ITERATE_RDEV(mddev,rdev2,tmp)
+	i = 0;
+	ITERATE_RDEV(mddev,rdev2,tmp) {
+		i++;
 		if (rdev2->desc_nr > max_dev)
 			max_dev = rdev2->desc_nr;
+	}
+	max_dev = max(max_dev, i);
 	
 	sb->max_dev = cpu_to_le32(max_dev);
 	for (i=0; i<max_dev;i++)
@@ -958,6 +962,7 @@
 	}
 
 	sb->recovery_offset = cpu_to_le64(0); /* not supported yet */
+	sb->sb_csum = calc_sb_1_csum(sb);
 }