Another todo item for you... The documentation needs to be updated and/or reviewed.
I have come across two issues in 2.5.6, and have checked the 2.6 documentation and they are still there.
1. The documentation refers to --raid_devices as the option for grow/build/create, whereas mdadm actually accepts --raid-disks
2. The documentation and `mdadm --grow --help` state that -n can only be used to change the number of devices on a RAID1 array, not on RAID 4/5/6. However, anecdotal evidence from the net seems to imply that it can be used for (at least) RAID 5. I hope that it can also be used for RAID 6 ;-)
In the documentation it states that --level is "Not yet supported with --grow." Is there any plan to allow that to work in the future? I am primarily interested in whether or not it will be possible to migrate from RAID5 to RAID6.
