The content of the FAQ "How much space will I get with my multi-device configuration?" (https://btrfs.wiki.kernel.org/index.php/FAQ#How_much_space_will_I_get_with_my_multi-device_configuration.3F) is currently wrong. The usable space is the sum of the space of the devices. I'm using multi-device btrfs (data: single, metadata: single or DUP) on kernels from 3.2 to 3.14 and I have never seen the behavior described in the answer.
Please remove this question. Thanks, -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html