IDE AHCI problem

F2kSel · 2 Nov 2012 at 23:48

I noticed that my SATA was in IDE mode, I changed it to AHCI to see if it made any difference.

I haven't seen any change but when I boot I get a message saying no drivers found. It still works ok.

I've since found out that this could be a problem and I should have done it this way :-

1. Startup "Regedit
2. Open HKEY_LOCAL_MACHINE / SYSTEM / CurrentControlset / Services
3. Open msahci
4. In the right field left click on "start" and go to Modify
5. In the value Data field enter "0" and click "ok"
6. exit "Regedit"
7. Reboot Rig and enter BIOS (hold "Delete" key while Booting

In your BIOS select "Integrated Peripherals" and OnChip PATA/SATA Devices. Now change SATA Mode to AHCI from IDE.

You now boot into windows 7, the OS will recognize AHCI and install the devices. Now the system needs one more reboot and voilla .. enjoy the improved SSD performance.

Is it safe to change it back to IDE and then do the above?

wazza300 · 2 Nov 2012 at 23:50

what board are you using? z68 z77?

F2kSel · 2 Nov 2012 at 23:53

If your referring to the mainboard then it's Gigabyte P55-UD5.

wazza300 · 2 Nov 2012 at 23:55

just run this reg file now,and reboot(assuming your in ahci mode as i speak) its all what you posted above put in to a reg file,just download and run it

http://cdn.ithinkdiff.com/wp-content/uploads/2009/05/ahci.reg

F2kSel · 3 Nov 2012 at 00:16

Thanks will do ASAP bit late right now.

Cheers.

F2kSel · 3 Nov 2012 at 15:15

wazza300 I tried updating the reg and setting BIOS to AHCI.

When I tried to restart I keep getting an error msahci.sys corrupt.
There is no file msachi.sys installed.

I didn't want to use the Windows repair function due to bad experiences in the past.
I did get XP working by returning to previous working version.

I've done some searches but all I find are so called fixer programs. I don't see how these would help as I can't boot windowsXP to run them. They always seem to want £30 quid as well.

I just don't know how to get XP to work in ACHI mode.

wazza300 · 3 Nov 2012 at 15:22

does it boot up in ide mode,you didnt say your os was xp? that reg hack only works for win7,there is a hack for xp but its far more complicated,

follow this guide for xp and copy paste the rst driver to windows/system32 folder

http://forums.pcper.com/showthread.php?444831-HOWTO-enable-AHCI-mode-after-installing-Windows

F2kSel · 3 Nov 2012 at 15:30

Sorry I missed that, I'm actually trying to get it to work for both xp and 7 and got a bit confused.

Lucky I've got it all working again in IDE mode.

I'm going to do some backups before trying again with XP.
Win 7 can wait for now.

Thanks.

wazza300 · 3 Nov 2012 at 15:32

ok its the first reg file i posted for win7,should just run it pop into bios anable ahci and boot in win7 and thats it

for xp its the guide on the first page and drag the rst driver file to windows system 32 folder reboot set ahci then boot into xp

ive done both reg hacks for win7 and xp few years ago and both worked fine