Create partitions using disks, partition type should be Linux raid AutoDetect (fd)
Creating RAID Device
# mdadm --create /dev/md0 --level=5 --raid-disk=3 /dev/sdb1 /dev/sdb2 /dev/sdb3
# mkfs.ext3 /dev/md0 - to make file system in RAID device
Mounting and using raid device
# mdadm –detail /dev/md0 - to see the raid device details
# mdadm /dev/md0 --fail /dev/sdb3 - to do manual failure of disk
To see the detail of raid device and any failed disks
# mdadm /dev/md0 --remove /dev/sdb3 - Removing failed drive from RAID
# mdadm /dev/md0 --add /dev/sdb4 - Adding New disk to RAID Device
To Destroy RAID Device and its related disk completely wipe
# umount /raid - to un mount the file system
# mdadm –stop /dev/md0 - Stopping RAID Device
# mdadm –remove /dev/md0 - to remove RAID Device
# fdisk /dev/sdb use d to delete all the disks from OS
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