raiddev /dev/md0
raid-level linear
nr-raid-disks 2
chunk-size 32 # Not used for linear
persistent-superblock 1
device /dev/sda1
raid-disk 0
device /dev/sdb1
raid-disk 1

raiddev /dev/md1
raid-level linear
nr-raid-disks 2
chunk-size 32 # Not used for linear
persistent-superblock 1
device /dev/hdf1
raid-disk 0
device /dev/hdh1
raid-disk 1