在主板BIOS里找到：
（Phoenix – AwardBIOS CMOS Setup Utility OnChip IDE Device Item Help
IDE HDD Block Mode [Enabled] On-Chip Primary PCI IDE [Enabled] IDE Primary Master PIO [Auto] IDE Primary Slave PIO [Auto] IDE Primary Master UDMA [Auto] IDE Primary Slave UDMA [Auto] On-Chip Secondary PCI IDE [Enabled] IDE Secondary Master PIO [Auto] IDE Secondary Slave PIO [Auto] IDE Secondary Master UDMA [Auto] IDE Secondary Slave UDMA [Auto] ATA 66/100 Cable MSG [Enabled])
** On-Chip Serial ATA Setting ** x SATA Mode [IDE]（就是这项） On-chip Serial ATA [Disabled]
x Serial ATA Port0 Mode [Primary Master Serial ATA Port1 Mode [Primary Master] 所有硬盘模式都在上面改
改过之后，系统一般都要重装
