I check ARECA GUI of my 1680, i don't have a lot of option :

Volume Option:
Volume Stripe Size : 64 KB (or 4, 8 16, 32, 128)
Volume Cache Mode : Write Back (or Write Through)
Tagged Queuing : Enabled

System Option:
SATA NCQ Support : Enabled
HDD Read Ahead Cache : Enabled (or disable Maxtor, Disabled)
Volume Data Read Ahead : Normal (or aggressive, convervative, disable)
HDD Queue Depth : 32 (or 1 2 4 8 16)
Disk Write Cache Mode : Auto (or Enabled Disabled)

And some others options, but i don't think they are "Cache" related.

I have to play with Write Back / Write Through first ?