mdadm zero-superblock to solve md device created on root device

It is possible to tell mdadm to create an md device on a raw disk even though it will give you an error, it writes a superblock and this corrupts the partition table which can result in your system not booting.

To fix it just zero the super-block on the offending device that you made the mistake in.

Eg: /dev/sda

mdadm --zero-superblock /dev/sda

It is also a way of starting fresh if you wanted to create a new array.


Tags:

mdadm, superblock, md, deviceit, disk, writes, corrupts, partition, booting, offending, eg, dev, sda, array,

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