RAID

[kalin m]

hi ...

i have a simple RAID question(s).

this is from the dmesg of a newly installed bsd7:

ad4: 238475MB <Seagate ST3250310AS 3.AAA> at ata2-master SATA150
ad6: 238475MB <Seagate ST3250310AS 3.AAA> at ata3-master SATA150
ar0: 238472MB <Intel MatrixRAID RAID1> status: READY
ar0: disk0 READY (master) using ad4 at ata2-master
ar0: disk1 READY (mirror) using ad6 at ata3-master

from what i understand here is that if at the time of installation i 
install the system on ar0 that means i'd have RAID1 made out of ad4 and ad6.
right?
is there any configuration to be done?
how do i know what driver is being used? it says:
hptrr: HPT RocketRAID controller driver v1.1 (Feb 24 2008 19:59:27)
.............................................
hptrr: no controller detected.'


that's it. thanks.