I have just purchased a Western Digital SATA drive to accompany my Seagate SATA drive and my ATA drives. The system (XP) will not recognise it. I plugged it in place of the Seagate drive to ensure the cables and controller were OK and if I have both connected, neither SATA drive is recognised by the system. In the CMOS part of the BIOS there is no place to specify Auto Detect or otherwise. This is the second Western Digital drive I have tried so it has to be something stupid I am missing but for the life of me I can't think what. To earn my everlasting thanks and a smooth ride to heaven when the time comes (probably) can you put me ouit of my misery.
DES

Found the problem . The motherboard wasn't able to understand the speed enquiry from the new SATA drive. Clamping the drive to 150 solved the problem
All working now.

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