Foxconn WinFast 6150K8M Series User Manual page 86

Attention :
1) All the data will be cleared after division is in process. So you'd better do
the division against an empty HDD.
2) At the same time, the HDD capacity will decrease to make space for the
hidden partition, which is unavailable for your normal use.
Release Hidden Partition:
This is used to release the hidden partition. If you choose this item and press
"Y" to confirm, the system will be restarted to release the hidden partition. But
the released partition is still unavailable for you after the system is restarted. It's
necessary for you to enable it by using FDISK, PQMAGIC, or some other tools.
Chapter 6 Special BIOS Functions
79