- Don't hold md device open for so long in --monitor mode - map_dev
can be slow and interferes with trying to stop the array.
- Support --uuid= with --create to choose your own UUID.
+ - New major more "--incremental" for incremental assemble of arrays,
+ intended for use with udev.
Changes Prior to 2.5.6 release
- Fix bug which meant "bitmap=xxx" in mdadm.conf was not handled