On Wednesday February 14, john9601@xxxxxxxxx wrote: > Feb 14 16:23:45 testsvr kernel: attempt to access beyond end of device > Feb 14 16:23:45 testsvr kernel: sdc1: rw=1, want=901904331651136, > limit=16081002 That 'want=' value is an enormous number! 52 bits. Looks a lot like an uninitialised variable somewhere. What does grep . /sys/block/md*/md/dev-*/offset show while the resync is running? How about grep . /sys/block/md*/md/dev-*/size And can you give me the output of "mdadm --detail' on the array? Thanks, NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html