Quick question regarding AHCI

IggyStooge · 1 Jul 2010 at 18:46

Hello

I installed an SSD recently and set JMicron Controller Mode to AHCI but have just noticed another option in IDE Config / Configure SATA as which also has AHCI as an option. Now wondering if I've set it correctly?

Blackwhite · 1 Jul 2010 at 19:07

u should set AHCI both of them

IggyStooge · 1 Jul 2010 at 19:09

Am I right in thinking that if I change it now I'll have a problem booting? I read it should be done before installing OS.

Blackwhite · 1 Jul 2010 at 19:36

u can change it now, but first u have to chcange registry under windows, then in BIOS.If not you will get BSOD.
to do this click on Start->serch->type regedit and press enter, click on it->hotkey local machine->system->current control set->services->msahci->from the left window choose start, right click on it->modify->change value from 3 to 0->press ok
after this go to your bios and change sata mode for AHCI.
Don't get anything wrong, or you will crash your system.

IggyStooge · 1 Jul 2010 at 20:32

Its already set to 0. What do I do now?

Cycrow · 1 Jul 2010 at 21:00

if its set to 0, then jsut change the settings in the bios, and it should work when you reboot

Blackwhite · 1 Jul 2010 at 21:15

let us know is it works

I've done the same today and it is workin fine.

IggyStooge · 1 Jul 2010 at 21:19

Lets assume it doesnt work, will I be able to go back into BIOS and change it back?

Blackwhite · 1 Jul 2010 at 21:41

What are u getting?BSOD?
You have to try to change - TBH I don't now why it doesn't work, it should.

IggyStooge · 1 Jul 2010 at 23:07

Well I've changed the Configure SATA to AHCI. Some drivers installed when I got to desktop and everything else seems the same.

Blackwhite · 1 Jul 2010 at 23:46

what about speed of your ssd?

IggyStooge · 2 Jul 2010 at 00:16

Doesnt really seem any quicker. Anything I can run to test?

Blackwhite · 2 Jul 2010 at 09:09

as ssd, cristaldisk, atto

IggyStooge · 2 Jul 2010 at 09:57

I've just refreshed the Windows Experience Index and its gone from 7.1 to 7.5for Primary hard disk so looks like its made some difference.

IggyStooge · 2 Jul 2010 at 13:13

Write speed is low isnt it?

Blackwhite · 2 Jul 2010 at 13:43

it is something wrong mate - you should get much higher score.
Not only write - read is too low as well.
I recon that you mobo is causing this problem

IggyStooge · 2 Jul 2010 at 17:23

So why would the motherboard be causing it? Would it be worth trying it on a different sata connection?

I've also now got a Hard Drive not showing up in Windows since changing to AHCI.

Mr Paul · 2 Jul 2010 at 18:33

Put it on the Intel controller and install the Intel Rapid storage drivers (9.6)

IggyStooge · 2 Jul 2010 at 18:49

Sorry you've lost me, how do I do that? Whats the intel controller?

Broken Hope · 2 Jul 2010 at 19:27

Your motherboard has more than one SATA controller, the JMicron being one of those controllers, you should have a block of 4-6 ports all the same colour, those will be the Intel Controller ports, connect the drive to one of those.