Installing Windows 7 seperate from Ubuntu

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http://askubuntu.com – I have three different HDDs. /dev/sda/ is my Ubuntu OS, which is 12.04 LTS by the way. I am a gamer, and although I can play a decent amount of games on Ubuntu, I would like to reinstall Windows 7 on another one of the hard drives without affecting /dev/sda. I know in the Ubuntu Terminal I can see /dev/sdb and /dev/sdc. These are my questions: 1) How can I tell associate which hard drives are SDA, SDB, and SDC? (Meaning associating the actual hardware on the BIOS Boot Menu with the specific drives) 2) If I install Windows 7 on a seperate HDD, shouldn't the MBR be located on that specific HDD (HowTos)