installing windows xp on another hard drive causes 7 not to boot

[Mike!]

I installed windows xp on a partition on a seperate hard drive. It works fine booting and such, but when i choose my 7 hard drive as a boot disk, it hangs on loading operating system.
What do i do?

When in xp i see all my 7 files and such

[editline]01:30AM[/editline]

Also i have a gigabyte p55

[GetOutOfBox]

I remember hearing something about when installing windows XP on a second drive, it overwrites the MBR on the other drive or something. I'll have to look it up, if I find something I'll get back to you.

In the meantime, I reccomend you pop the Windows 7 dvd into your drive and start the recovery console, when its started type "fixmbr" without the quotes. Make sure you specify the drive using the argument /Device/HardDisk<insert disk number here> . I believe the disk number's are ordered and assigned to drives in order of the drives connections to the motherboard, for example, with SATA drives, if you had the win 7 drive plugged into say, the 3rd sata adaptor and the XP drive plugged into the 5 adaptor, the win 7 drive would be indicated using

fixmbr /Device/HardDisk0 , indicatating the 1st hard disk (computers count from 0 dontcha know?)

[editline]03:56PM[/editline]

I remember hearing something about when installing windows XP on a second drive, it overwrites the MBR on the other drive or something. I'll have to look it up, if I find something I'll get back to you.

In the meantime, I reccomend you pop the Windows 7 dvd into your drive and start the recovery console, when its started type "fixmbr" without the quotes. Make sure you specify the drive using the argument /Device/HardDisk<insert disk number here> . I believe the disk number's are ordered and assigned to drives in order of the drives connections to the motherboard, for example, with SATA drives, if you had the win 7 drive plugged into say, the 3rd sata adaptor and the XP drive plugged into the 5 adaptor, the win 7 drive would be indicated using

fixmbr /Device/HardDisk0 , indicatating the 1st hard disk (computers count from 0 dontcha know?)

[The Chef]

[QUOTE=GetOutOfBox;25363440]I remember hearing something about when installing windows XP on a second drive, it overwrites the MBR on the other drive or something. I'll have to look it up, if I find something I'll get back to you.

In the meantime, I reccomend you pop the Windows 7 dvd into your drive and start the recovery console, when its started type "fixmbr" without the quotes. Make sure you specify the drive using the argument /Device/HardDisk<insert disk number here> . I believe the disk number's are ordered and assigned to drives in order of the drives connections to the motherboard, for example, with SATA drives, if you had the win 7 drive plugged into say, the 3rd sata adaptor and the XP drive plugged into the 5 adaptor, the win 7 drive would be indicated using

fixmbr /Device/HardDisk0 , indicatating the 1st hard disk (computers count from 0 dontcha know?)
[/QUOTE]

Easier way of doing this is getting EasyBCD and re-writing the MBR for Windows 7 through that