cat /proc/mdstat
sudo fdisk -l /dev/sdb
sudo fdisk /dev/sda
sudo fdisk -l /dev/sda
sudo mdadm --manage /dev/md0 --remove /dev/sda1
sudo mdadm --manage /dev/md0 --add /dev/sda1
sudo mdadm --detail /dev/md0
cat /proc/mdstat
sudo grub-install /dev/sda
sudo zdb
ls -l /dev/disk/by-id/
sudo zpool status
sudo zpool offline rpool /dev/disk/by-id/ata-Hitachi_HDS5C3020ALA632_ML0220F31K832N-part2
sudo zpool replace rpool /dev/disk/by-id/ata-Hitachi_HDS5C3020ALA632_ML0220F31K832N-part2 /dev/disk/by-id/ata-Hitachi_HDS722020ALA330_JK11A8B9HZAPMF-part2
sudo zpool status
