What data is it the reinstalled Win7 does not see? Was there a data partition you saved which is why you say you wiped only the OS partition? Why don't you say this instead of making us guess?
Please tell us exactly what you did, why you only wiped one partiton and not the entire HD, what data is not seen by Win7. In addition post a screenshot of your maxmimized Disk mgmt drive map with listings, showing all columns, using the Snipping Tool in Start Menu. Tell us what's on each partition.