On 11/06/2016 08:13 PM, Marc MERLIN wrote: > On Mon, Nov 07, 2016 at 11:16:56AM +1100, NeilBrown wrote: >> Is this a 32bit system you are using? Such systems can only support >> buffered IO up to 8TB. If you use iflags=direct to avoid buffering, you >> should get access to the whole device. > > You found the problem, and you also found the reason why btrfs_tools > also fails past 8GB. It is indeed a 32bit distro. If I put a 64bit > kernel with the 32bit userland, there is a weird problem with a sound > driver/video driver sync, so I've stuck with 32bits. Huh. Learn something new every day, I suppose. Never would have thought of this. Thanks, Neil. Phil -- 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