How to mirror the FreeBSD OS on two disks

[Wojciech Puchar]

>
> The current Handbook procedure avoids the copy by using the existing disk 
> as-is and just writing the gmirror metadata to the last block.
Exactly what i do doing instalations manually!


> If that last block is already part of an MBR partition, the more strict checking stops 
> booting in 9.0.

not making MBR partition would not make problems.