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Windows 7: Problems when switching BIOS settings to AHCI; two of my drives vanish

19 May 2014   #1
ziffel

Windows 7 HP 64bit, SP1
 
 
Problems when switching BIOS settings to AHCI; two of my drives vanish

Win7-64 Home Premium SP1
mobo: Gigabyte EX58-UD3R (latest possible Firmware)

hard drives:
* physical 1: 500GB WD AAKS, for C: and D:
* physical 2: 1 TB WD, split into two partitions
* physical 3: 500GB WD, drive G: ... for storage
* physical 4: 500GB WD AAKS: drive K: for steam/games
* physical 5: 3 TB WD green, in an external dock (Thermaltake BlacX)

* (soon: Crucial M500 240GB SSD)

I have a new 240 GB SSD on order, and I've been reading that I need to enable AHCI in the BIOS to get the most out of it - if not to get it to work at all (my buddy said his wouldn't work until AHCI was enabled)

So I did the registry edit MS published that lets you enable AHCI on an existing windows installation. Then I go to the BIOS, and changed two settings to AHCI. Here are the screens of my BIOS, and what I see:

imgur: the simple image sharer

One entry is "ICH SATA control mode", and the other is "Onboard SATA/IDE control mode"

Both have options to change to AHCI. I have no idea why there are two different ones, or what either means. I changed both. I rebooted and the PC goes through an AHCI search function during the boot. It gets to windows and windows goes through a lengthy process of installing drivers, which seemed to be successful, but the problem is that when I now go into Device Mgr, I get errors on two of my ATA channels under "IDE ATA/ATAPI controllers" -- I get exclamation points by two of the ATA channels. And sure enough, two of my physical drives have vanished from Windows Explorer -- always physical drives 3 and 4 (drives G: and K:)

When I get the SSD, is it best just to install Windows clean? I'd prefer to clone my existing C: to it, but if I install clean - should that resolve the AHCI issue? Or is there something I can do now to resolve it? or should I just forget about AHCI, and go back to IDE in the BIOS?

Thanks a bunch for reading this and for any help.


My System SpecsSystem Spec
.
20 May 2014   #2
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Are all of your drives SATA drives?

What happens if you change the "Onboard SATA/IDE Control Mode" only?
What happens is you change the "ICH SATA Control Mode" only?
My System SpecsSystem Spec
21 May 2014   #3
ziffel

Windows 7 HP 64bit, SP1
 
 

Quote   Quote: Originally Posted by TVeblen View Post
Are all of your drives SATA drives?
Yes.

Quote   Quote: Originally Posted by TVeblen View Post
What happens if you change the "Onboard SATA/IDE Control Mode" only?
What happens is you change the "ICH SATA Control Mode" only?
If I toggle either of those, some of the drives that do show up (with both enabled), aren't found and disappear.
My System SpecsSystem Spec
.

21 May 2014   #4
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Damned strange.
What motherboard are you using, or if pre-built, what is the brand and model number?

EDIT: I see MB in first post, sorry.
Do all the drives show up in BIOS? Or is the problem just in Windows?
My System SpecsSystem Spec
21 May 2014   #5
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Are all the drives plugged into only the BLUE SATA ports?
Do you have any drives plugged into the WHITE SATA ports?
Are you using any IDE Drives in the IDE port?
My System SpecsSystem Spec
Reply

 Problems when switching BIOS settings to AHCI; two of my drives vanish




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