can change size.
- Default to --auto=yes so the array devices with 'standard' names
get created automatically, as this is almost always what is wanted.
+ - Give useful message if raid4/5/6 cannot be started because it is
+ not clean and is also degraded.
+ - Increase raid456 stripe cache size if needed to --grow the array.
+ The setting used unfortunately requires intimate knowledge of the
+ kernel, and it not reset when the reshape finishes.
+ - Change 'Device Size' to 'Used Dev Size' because it only shows how
+ much of each device is actually used, not how big they are.
Changes Prior to 2.5.6 release
- Fix bug which meant "bitmap=xxx" in mdadm.conf was not handled