Hello Newmanso, first of all, I would need to inform you that this platform is not longer being supported, however I can give you some recommendations and steps you would need to follow.
According to the pictures, it looks like you have a RAID 1 on you system, which means that once you rebuilt the RAID, the information on the working hard drive will be copied on the new or the formatted hard drive.
When you insert a new drive, sometimes the rebuild is not done automatically, it needs a user action, therefore you would need to right click on the new hard drive and choose add to this drive or rebuild to this drive.
The following picture is only an example
A Raid 1 is a mirrored, which means that if you have a 100 GB hard drive and another one is 50GB, the Raid will take only 50 GB from the first HD and you will lose the rest. We always recommend using identical hard drives, same speed, same size and same model number.
The following link contains the User’s manual http://download.intel.com/support/chipsets/imsm/sb/8_x_raid_ahci_users_manual.pdf
Also, there is a new version of the software (126.96.36.1993) in case that you would like to download it.
Thanks, Sylvia! Really appreciate your help.
You are very welcome!