I have to thank you for the work you've done on md.. I use it daily 24/7 and so far very satisfied! I have few questions though:
- is it possible to reshape raid5 -> raid6 ? If so, what would be the mdadm syntax and how many spares do I need for the process? (currently I have 11 1TB drives in Raid5 (10G array) + 1x 1TB spare - unused). 'mdadm --grow --level 6 --raid-devices 12 /dev/md1' does tell me: Cannot reshape array without increasing size (yet).
- if I mark drive as failed and remove it or initialize the array accidentally without one drive, is there a possibility to re-add the drive immediately without going into re-sync? mdadm --re-add does not seem to have effect (resync is initiated) and --assume-clean cannot be used when re-adding drive.
thank you, Roman D.