Question about gmirror?

[perikillo]

  Hi people.

  I have one system running FreeBSD 6.1-p11 i have there a Raid-1 setup with
gmirror, is working very good && stable, but i need to add another space not
for the raid, is for the applicaction im running there like a temporal
buffer, my doubt is:

Can i add another disk to the system apart from the Raid?

  Example:
Raid-1 --> ad0 + ad2 (/, /usr, /var, /tmp, /home, swap)
extra disk -->ad3 (/buffer)

  I have this doubt only.

  Thanks all for your time.