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Will switching to AHCI affect my second storage HDD (non-system SATA drive)?

W

WAZ

Golden Member
So I just upgraded to a Kingston HyperX SSD drive, using the Acronis "clone" technique as instructed in the manual that came with the SSD. I've since read that the best way would have been to install Win7 fresh on the SSD in AHCI mode, but at this point that's neither here nor there. :$ I followed Kingston's instructions and I guess it's working fine... but I'm in IDE mode.

Now I have Win7 running on the SSD, but I also have a second hard drive with all my "stuff" on it... it's a standard SATA II, 7200RPM drive. Both hard drives (and both of my DVD drives) are all four on the same SATA controller (AMD SB750)... I also have two GSATA (Gigabyte SATA) ports but didn't really want to use them as I've read mixed reviews and have had zero problems on the AMD ports + drivers.

So if I switch to AHCI after Win7 installation, using the reg edit as detailed here, and then rebooting and changing the AMD SB750 SATA ports to AHCI... that will change both hard drives to AHCI, correct? Is that all okay, to have my SSD and standard SATA2 on the same controller in AHCI mode? I just want to make sure I don't mess anything up. Thanks!
 
Sounds good, thanks.

Now the only thing I'm seeing is a few different sets of instructions. ALL of them say to change this reg value to 0:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci

So that's done... no problem. But now I see Microsoft instructions also saying to change:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV

... but then Neowin Guide and misc forum posts saying to change:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Pciide

Some guides don't mention /IastorV and Microsoft doesn't mention /PCiide... that OCZ guide I linked to earlier ignores both... So which of these should I mess with (or not)?
 
Never mind. Pciide was already set to 0, and I found enough misc info about changing IastorV — some saying it's only necessary for RAID, others saying it's necessary if the AHCI drive is your boot drive, others saying they just change them all to 0 — that I went ahead and changed that one as well. Plus that was the official Microsoft way of doing it. So from what I can tell, everything's working fine now. Thanks.
 
Make sure you go to control panel - Performance Info/Tools and run the WEI then reboot.
 
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