Serial ATA hard drives installed to some HP laptops can run in advanced host controller interface or integrated drive electronics mode. Hard drives running in AHCI mode won't function in older operating systems -- like Windows 98 -- but come with advanced features, like native command queuing, which optimises the hard drive's read/write queue. Hard drives emulating IDE mode run like IDE hard drives, making them compatible with older operating systems, but don't come with the same features as AHCI.
You can alter the basic input/output system (BIOS) to configure which mode a SATA device emulates. The BIOS is a start-up software that determines how devices behave after booting the HP laptop.
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Turn on or reboot the HP laptop. Press "F10" when the HP logo screen appears to go to BIOS set-up.
Use the right- and left-arrow keys to select the "Advanced" tab. Use the up- and down-arrow keys to scroll down to "SATA Controller Mode" or "SATA1 Controller Mode."
Press "Enter." Use the "+" and "-" keys to change the SATA mode from "AHCI" to "IDE." Press "Enter" again.
Use the right- and left-arrow keys to go to the "Exit" menu. Select "Exit Saving Changes," then press "Enter."
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