On Mon, Jun 25, 2012 at 11:54:50PM +0400, Dmitry MiksIr wrote:
> Hello!
> Long time ago I created btrfs on /dev/sda
> After some changes btrfs moved to /dev/sda1 (well, to md, and sda1 is part
> of md).
> 
> As result, <btrfs fi show> show me 2 filesystems: new one and old one.
> Probably I need to do some cleaning. Can someone tell me what to do.

quick aid is to run this command:

dd if=/dev/zero of=/dev/sda bs=1k count=4 seek=64

(deletes just the btrfs superblock and will not touch anything
else)


david
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