to 'clean'. This is slightly safer in some cases.
- Check device is large enough before hot-add: this improves quality
of error message.
+ - 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.
Changes Prior to 2.5.6 release
- Fix bug which meant "bitmap=xxx" in mdadm.conf was not handled