RAID Rebuild

OS Disk

Replace /dev/sda and /dev/sdb if required !!!

Wipe New Disk wipefs -a /dev/sdb

Copy Partition Table from other Bootable-Disk to New Bootable-Disk sfdisk -d /dev/sda | sfdisk /dev/sdb

NOT DONE YET, now replace the "broken" device with the new one using btrfs tools and scrub after that one time maybe.