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HowTo: Removing BtrFS from a bunch of drives (BOD)

Ok, I just discovered how to remove BtrFS from a bunch of drives. It got kind of hard at first but, thanks to the #btrfs channel, I discovered how.

<code>for device in sd{d..g}; do dd if=/dev/zero of=/dev/$device bs=4k count=1 seek=16; done</code>

This will remove a 4k block; starting from 64k. This did it.

Why would you like to do this? Well, just to try some different configurations. Also, I got into a problem while using different labels and stuff...