Does Vista Home Prem. OS support setup of two bootable hard drives

I 'd appreciate some help here. MS phone tech support recommened going to a
forum for this. Computer and OS is fine, I just want to do something I don't
know how to do yet.

Wanted:
Want to Add a 2nd bootable HD (same as 1st or master) as insurance against
HD failure. Upon Bootup, I want to be able to select which HD to use. Both
HDs will have Vista on C: and XP on the partion D: I may delete D: later
because I only use Vista.

I have done this:
With 1st HD disconnected, I formatted & installed 2nd HD with XP, then Vista
UpGrade, Norton, Office, Adobe, etc. Worked absolutely great!
Then I reconnected 1st HD to Sata 1 on motherbd, and 2nd HD to Sata 2 on
Motherbd. Boots up on 1st HD, everything works great but 2nd HD acts as a
great backup drive but will not boot-up as it did when it was alone (there is
no option to boot up to it). Windows Explorer shows 2nd HD as F: and Partion
is G:

I am fairly confident nothing is wrong and it is doing what is expected. I
need to know how to setup it up for giving me a boot up menu for drive
selecton.


Jumpers: No Jumpers are presently used.
Western Digital manual Jumper info:

1. Default Configuration - no jumpers needed

2. SSC enabled - jumper pins 1 & 2 (spread spectrum clocking)

3. PM2 enabled - jumper pins 3 & 4 (contrled spinup)

4. OPT1 enabled -jumper pins 5 & 6 (150 MB/s data transfer speed enable)

Thanks for taking the time.