Chunk Size and Cluster Size (SiI3114)

I'm using a raid card with SiI3114.
When using the SATARAID5 software it requests for a chunk size upon the RAID5 creation.

Example if i were to choose 32KB chunk size
Should i choose 64KB cluster size for NTFS or 32KB or lower 16KB?

By the way is SATARAID5 considered as hardware or software raid.

if you have a spare harddrive to install the os do what i did and try all the combinations:

url here

:)

I found 16K stripe, 4k cluster the best combination...

Thanks for the info.