Creating RAID Partition

Creating RAID-5

For this you need 3 Partition, 2 partitions with same size and 3rd partition is 10% greater than 1st or 2nd( since 1 & 2nd partition of same size.). You can use fdisk command to create partition and make sure partition type must be FD. In fdisk command use option t to change partition type.

eg. I have created /dev/sda1, /dev/sdb1 and /dev/sdc1.

Once you created 3 partitions use this to make RAID 5:
#mdadm --create /dev/md0 --level=5 --raid-device=3 /dev/sd{a1,b1,c1}

Check the RAID partition using:
#less /proc/mdstat

Or you can see detail information's using:
#mdadm --detail /dev/md0

To rebuild corrupted partation use:
#mdadm /dev/md0 -r /dev/sdb0