Best way to create a large data space

[stan]

 i have a Sun Ultra 40 with 4 500F SATA drives. I plan on using this
 machine primarily for a large data storage requirement.

 What I want is one large /data partition. Given all the choices for doing
 this in FreeBSD (software) what's the "best" choice here? The partio will
 be shared via SAMBA if that affects the thhinking here.

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