how install two freebsd9.2 on one disk?

[Warren Block]

On Sun, 17 Nov 2013, Polytropon wrote:

...
> As you're probably initializing the SSD with UFS, keep in mind
> that you can apply certain optimizations to make the SSD have
> a long and happy life. :-)
>
> 	# newfs -m 0 -i 16384 -b 16384 -f 2048 -l -L os1root ada0s1
> 	# newfs -m 0 -i 16384 -b 16384 -f 2048 -l -L os2root ada0s2
>
> This is just an example which somehow corresponds to the legacy
> partitioning method mentioned above. You need of course to set
> the parameters to _your_ intended way of use!

If overriding defaults, I would make nothing less than 4K (-f above). 
But for SSDs, I just use the defaults with UFS on FreeBSD 9 and later, 
and it does not appear to be giving up SSD performance.