Wojciech Puchar writes:
> if you have identical disks
> 
> dd if=/dev/rdisk1d of=/dev/rdisk2d bs=64k
> 
> with make 1:1 copy of everything

Yes, this will work, but if the source disk is an IDE disk, it will
also log a bunch of unsightly error messages when it reaches the end
of the disk; see PR kern/1238.  This really ought to be fixed.
-- 
Andreas Gustafsson, gson@nominum.com