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Adding Raid 1 to Raid 0 on Linux

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linux-howto

http://serverfault.com – I have a system already configured with raid 1 with 2 disks: /dev/md1 918347072 249416692 621528596 29% /var /dev/md0 9920532 160640 9247828 2% /tmp # cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sdc5[0] sdb5[1] 948035712 blocks [2/2] [UU] md0 : active raid1 sdc2[0] sdb2[1] 10241344 blocks [2/2] [UU] I have asked for changing this into Raid 0+1 (strips are mirrored, http://en.wikipedia.org/wiki/Nested_RAID_levels#RAID_0.2B1 ) How can I change this partition into Raid 01 after adding 2 more disks without formatting? (HowTos)