====== RAID Metadata Removal ======

http://serverfault.com/questions/488346/removing-raid-metadata-from-drives

http://www.server-world.info/en/note?os=CentOS_6&p=raid_metadata

If you are **reusing disk drives that were once members of a RAID array**, you should **remove the RAID metadata** from the disk drives first.

<note warning>Leaving RAID metadata on drives can cause serious and varied problems when you go to reuse the drives for another purpose.</note>

===== Intel (Integrated) RAID =====

  - Configure the SATA in the host BIOS to RAID mode
  - Enter the RAID configuration (Control-I)
  - Delete the RAID volumes
  - If the RAID configuration (metadata) is 'messed up'
    - Recreate a RAID volume
    - Reboot and go back into the RAID configuration (Control-I) again
    - Delete the RAID volume just created
    - Reboot again

===== Linux Software RAID =====

Where ''x'' is the drive you want to remove the RAID metadata from:

<file>
mdadm --zero-superblock /dev/sdx
</file>

or:

<file>
dmraid -r -E /dev/sdx
</file>

or:

<file>
dd if=/dev/zero of=$YOUR_DEV bs=512 seek=$(( $(blockdev --getsz $YOUR_DEV) - 1024 )) count=1024
</file>

Then verify:

:!: You may need to **reboot**!

<file>
dmraid -r
</file>

or

<file>
mdadm --detail --scan --verbose
</file>