Windows 7 does not recognize one of the hard drives

[WeBBy421]

This is really peculiar..

Recently upgraded the computer and installed windows 7 ultimate. Realized I needed some programs that will not run in Win 7 (even with XP compatibility mode) so I installed Win xp Pro sp3 on one of the drives.

Yes, I know Win 7 won't let me do that, so I unhooked the win7 hd and did a clean install of win xp on an extra drive and then hooked everything back up.

Computer has a total of 6 drives: 4 hard drives (various partitions) and 2 dvd burners.

When I boot to Win XP (through Bios; only way I can get to xp atm), everything works and all the drives are present (all 4). However, when I go into Win 7, only 3 of the hard drives are present - the entire drive with Win xp is absent even from the disk manager. Even the empty partition (400gb) on the drive with Winxp (in a 100gB partition)is absent.

Computer naturally boots to win 7. Like I said, only way to get to XP is from bios. I only noticed the missing drive when I went to set up a selective multi-boot (which I can't do because the dive is not there!).

Any ideas would be appreciated.

Thanx

 

[ReaperWarLord]

the bios could be a fault although it seems hard to belive. this could be a one timer maybe dissconnect the reconnect or maybie the drivers my be corrupt:huh:

 

[WeBBy421]

I have already solved the problem...
I had already switched cables around with no effect.
Couldn't be the mb because WinXP recognized the drives.

Solution: Seems to be a bug in win7 (found that on MS website).
Went to device manager (NOT disk manager), selected IDE ATA/ATAPI Controllers and scanned for hardware changes.
It found the empty partition but not the WinXP partition.
Rebooted and repeated. Found the second partition on the drive.
Modified boot record and all is good

Thanx