aggr0 - adding disks and creating volume for data

Hi,

I am new to Netapp.

We recently bought 2 filers with 12 disks each : FAS2552  - NetApp Release 8.2.3P3 7-Mode

Since the aggr  already took 6 disks (3 for each controller), I am thinking of  simply adding the remaining 6 disks to it and create my data volume there (alongside the root volume).

Is this recommended ?  if not, are there any issues with regard to system stabliity and performance that I need to be aware of ?

thanks in advance.