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What's DOS?
Posts: 1
Registered: ‎10-27-2011
Location: Maryland
0 Kudos

T420 Dual Boot Trouble 7 & XP

I have a Think Pad T420 with dual boot option of Windows 7 Pro and Windows XP Pro both 32-bit. However for me to boot into Windows 7 I have to set the SATA configuration in the BIOS to AHCI Mode, but that will cause the XP to BSOD with the error of unable to detect hard drive. I change the SATA configuration to Compatibility and Windows XP can boot successfully but Windows 7 BSOD with the same error. I cannot seem to find the right driver for the AHCI chipset for Windows XP. If anyone could offer any assitance, that would be great.

Posts: 9,240
Registered: ‎12-26-2009
Location: Toronto, Canada
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Re: T420 Dual Boot Trouble 7 & XP

It'll be the Intel Rapid Storage drivers for XP to work in AHCI mode.
W520: 2720QM, Q2000M at 1082/1376, 32GB RAM, 500GB + 750GB HDD, FHD screen & MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 160GB HDD, WXGA+ screen
TPT1: 1839-23U