Worked fine - Had win XP on one HDD, Vista on 2nd HDD and Put bata Win 7 on 3rd HDDs.
I'm starting from the begin of mine as an illustration. Had XP on one disk. Disconnected that disk. and with only 2nd HDD connected, installed vista on it and after install reconnected Win XP disk - daul boot win XP & Vista. Along came windows 7 beta. Disconnected both XP and Vista. Then installed win 7 beta on 3rd HDD, walla, triple boot.
I DO NOT like software Boot managers, Reason for only having the one drive installed. You Set BIOS Boot priority to most often used OS Disk. To select a diff OS you simply Hit the Key that brings up a boot menu during post.
WORKS GREAT.
NOW for the disclamer. My Laptop has two drive bays. Win 7 on SSD #1 and SSD #2 for storabe. Removed SSDs and installed win 8 beta on SSD #3. when down stuck my Win 7 SSD back in. When ever I selected Win 8 to boot to it whould Mess with my win 7 disk - NOT SUPPOSE to do that. So that when I returned to win 7 I would get a error. Removed Win 8 and threw the win 8 Beta disk in the trash.
HOPEFULLY the fixed this BUG, or lousy implimetation!!
My self, in 100 hundred agreement. Leave your window 7 on Disk #1, Disconnect that drive and connect your SSD #2 and install Windows 8 (using the upgrade Disk)
After 6 Months and they have worked out the Bugs in windows 8, THEN when your comfortable with windows 8 you can ditch your windows 7.
Link on using win7 (assume Win 8 will be the same) Upgrade version to do a clean install on 2ndary Disk.
There are two methods - one is called double install. You install once (select custom install) WITHOUT entering your Key. then re-install but this time enter your key.
2nd method (My preference) Same as above, select Custom install and do NOT enter Key then requires a simple reg edit and run a simple dos command.
Read:
http://www.maximumpc.com/article/howtos/how_use_your_windows_7_upgrade_disk_fresh_pc?page=0,1