RAID convert 1 to 5 / micro-tuto

Convert #raid1 to #raid5
mdadm --grow /dev/md0 -l5
mdadm --grow /dev/md0 --add /dev/sdc1
mdadm --grow /dev/md0 -n3
watch "cat /proc/mdstat"
0% ... +30h ... 100% ^^
resize2fs /dev/md0
Have a good week <3

— PG3 (@pg3io) September 23, 2019