two Hard drive formatting problem

2 hard drives, another hard disk formatting is now needed before we can use, but there are important things which can not be formatted, what approach is not formatted to save data inside the hard disk on my computer can not find, in the management and BIOS Inside there, use the hard disk partitioning software shown above is not formatted the hard disk needs formatting.

Suppose that the data not the data for A for B, not A first disk, the B partition, format, install a good system, and then confirm the system to normal, hang pairs of hard drives, set the startup disk B, into the new system can be convenient to put data down to the B drive, and then handle the A plate, the same way as the data down on OK