[CentOS] Network Storage

Hello,

 

I have looked into the various network attached storage devices and software
based solutions.

 

Can't really find one I like.

 

Would it be possible to add a couple HDs to my existing 6.8 server and set
them up as RAID drives?  If so, how would I keep it from mirroring the
system drive?

 

Just spent$2500 on a transmission for my truck, so I broke right know and
need to go the cheapest route.

 

TIA