ACPI (Advanced Configuration and Power Interface) primarily deals with power states. I think you are mistaking it for AHCI (Advanced Host Controller Interface), which does deal specifically with advanced features for SATA drives. Enabling AHCI after an installation has already been completed does cause a boot BSOD under Windows. There are ways to perform a switch without a reinstallation though.
Greg > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:hardware- > [EMAIL PROTECTED] On Behalf Of Brian Weeden > Sent: Saturday, October 18, 2008 6:31 AM > To: [email protected] > Subject: Re: [H] acpi > > That's my understanding but it also involves disk interfaces. I think > for > hot swap features, not sure. > > I've gotten bitten by this twice. The most interesting was when I > enabled > ACPI not thinking and when I rebooted window's wouldn't boot (can't > remember > if it was a BSOD or a "no boot device found"). So I went back in to > the > BIOS and disabled ACPI but window's still refused to boot. Had to > re-install. > > > ------ > Brian > > > > On Sat, Oct 18, 2008 at 2:29 AM, maccrawj <[EMAIL PROTECTED]> wrote: > > > Drive issues from enabling/disabling ACPI? Am I forgetting some old > > knowledge? > > > > ACPI is just modern APM, no? > > > > > > > > > > Brian Weeden wrote: > > > >> ACPI is an advanced way for the OS to communicate with peripherials, > >> notably > >> drives. It's not required but does have some interesting features. > >> > >> Be careful though. If you install Windows on a system with the BIOS > set > >> to > >> SATA or IDE communication with drives and then change it to ACPI > it's > >> likely > >> that Windows will not boot. That's because the driver used to read > from > >> the > >> hard disk is different. So if you are planning on using ACPI (which > does > >> have some benefits) then turn it on in the BIOS before installin > windows. > >> > >> If you're doing it on a system that already has Windows installed, > make > >> sure > >> you install the drivers in windows BEFORE turning on ACPI in the > BIOS. > >> > >>
