root@magnia:/# mdadm -A /dev/md0 --scan
mdadm: /dev/md0 has been started with 3 drives.
root@magnia:/# mke2fs -n /dev/md0
mke2fs 1.40-WIP (14-Nov-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
4071648 inodes, 8140864 blocks
407043 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
249 block groups
32768 blocks per group, 32768 fragments per group
16352 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624