MSI K8T Neo-FSR User Manual page 100

MSI Reminds You...
Even though 64KB is the recommended setting for most users, you
should choose the block size value which is best suited to your
specific RAID usage model.
4KB: For specialized usage models requiring 4KB blocks
8KB: For specialized usage models requiring 8KB blocks
16KB: Best for sequential transfers
32KB: Good for sequential transfers
64KB: Optimal setting
Use the arrow key to highlight Start Create Process and press <Enter>.
A warning message will appear, Press Y to finish the creation, or press N to
cancel the creation.
Important note: All existing content in the hard drive will be destroyed
after array creation.
VIA VT8237 Serial ATA RAID Introduction
B-7