I decided to set up dual-booting on my Vista PC, so I created a second partition on the HDD and installed XP.
I repaired my Vista boot record using the tool on the Vista installation DVD and then used EasyBCD to sort out the boot sequence.

I can see the Vista partition when I'm running XP, and vice versa when running Vista. However, the PC contains an additional HDD for data such as music and movies and unfortunately, I can no longer see this disc in Windows Explorer (Vista or XP).

I CAN see it in Computer Management, but it has no letter assigned.

Does anyone know how I can resolve this problem?
Thanks.

 

Right click the drive in disk managment (right my computer > manage > disk managment) and select assign drive letter, I'm sure thats how ive done it in the past

How to change drive letter assignments in Windows XP