How do I gmirror slices?

[Hansa]

> > Hmm... I dont think so... There is the first sector of the 
> disk, that is read
> > by the BIOS, then there are 8KB somewhere at a fixed position 
> outside the file
> > system... And I think those 8KB are already able to 
> understand/read UFS... :-)
> 
> It's not really outside the file system, it appears at the 
> beginning of the
> file system.  It's 8KB for UFS1 and 64KB for UFS2.  Not only 
> that, but that
> 8K or 64K chunk is open/unused at the front of every superblock, that is:
> for every cylinder group, IIRC.
> 

Is that why fdisk doesn't touches the first 8/64KB before the first slice?

Offset       Size(ST)        End     Name  PType       Desc  Subtype Flags

         0         63         62        -     12     unused        0
        63   12578832   12578894    ad4s1      8    freebsd      165

Regards,
-Hansa