How to find which hard drive represents each drive letter?

To make things clear:

Open Start Menu

In search box type - Computer Management

In left hand tree menu - Storage-> Disk Management

Lower pane - Right click "Disk 0" (grey area) -> Properties

This will provide the model number of the drive...not the serial number.

If all of your drives are the same, unplug and use process of elimination.

If you have to use that method, be sure to look in your bios and copy down the primary boot disk priority order...and if the one you unplug keeps the system from booting...obviously that one is the boot disk. When you plug it back in make sure to reset it's priority position as "first" since some systems will hang on other drives.

For the second question: look for a "boot manager"

If your drives are in any kind of RAID configuration, I don't believe that this is possible as Windows won't see the individual disks (and they'll use a generic driver).

However, if they aren't, you should open the MIcrosoft Management Console (start > run > mmc) and load in the Disk Management snap-in. This will show you show you which drive letters are assigned to which disks and you can check the disk properties (right click > properties) to see the vendor.