BTRFS filesystem
- Create raid array, raid1 all data mirrored once.
- # mkfs.btrfs -m raid1 -d raid1 -L root /dev/disk/by-label/root1 /dev/disk/by-label/root2 /dev/disk/by-lab
el/root3 /dev/disk/by-label/root4
- Mount options, add compress
- subvolumes
- mount optione subvol=homevol
HP Server Raid tools
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