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Thread: Issue with ACHI




  1. #1
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    Default Issue with ACHI

    hi all, i've been drived mad by my new P55-UD3L board. Whenever i tried to switch to ACHI mode, there'll be problem communication between the motherboard and CD rom/harddisk. when i try to boot from the CD rom, it says there is a hardware failure. and when i try to boot from the harddisk, there'll will a disk read error. What is strange is that there'll be no problem at all in IDE mode. i'd like to use ACHI mode. So is it the problem with my motherboard or my harddrive/CDrom? hope someone can help.

  2. #2
    kick's Avatar
    kick is offline Senior Member
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    Default Re: Issue with ACHI

    You mean ahci?
    as far as i know if u use ahci from the start you should be ok.
    If you dont you may have to reinstall the os,
    vista and win 7 have the ahci drivers ,so u may be able to work with those.
    are there some advantages to using ahci,hot swapping hdd drives? and native command queuing>?
    I mean do u actually want to use it for something or just try it cos its there?
    Last edited by kick; 10-24-2010 at 07:40 PM.
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  3. #3
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    Default Re: Issue with ACHI

    That's right. If you have already installed Windows in IDE mode, and then later decided to switch to AHCI, then you need to do some things. Basically, you have not properly instructed Windows to run under AHCI. If you Google, you should be able to find out pretty easily how to prepare Windows for the change. It's a bit of a hassle. But if should take 10-20 minutes to make the change--perhaps quicker if you know what you are doing. :)

  4. #4
    Acebmxer's Avatar
    Acebmxer is offline Gigabyte Elite
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    Default Re: Issue with ACHI

    Enable switching between all IDE/AHCI/RAID modes by changing "Start" Values in these keys to 0

    Code:
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci\Start
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Pciide\Start  
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStorV\Start
    make these changes in the registry then reboot into bios set to ahci then you will be able to install the drivers.
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  5. #5
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    Default Re: Issue with ACHI

    if your dvd drive is an ide drive sometimes it wont work when in ahci mode only in ide(my lite-on ide dvd drive wouldnt work in ahci) i got a new sata dvd drive and it works in ide and ahci
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  6. #6
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    Default Re: Issue with ACHI

    thx all for replies. i did google about the AHCI issue and have tried various methods including those mentioned by u guys. but all didn't help so perhaps there're some problem with my hardware...

  7. #7

    Default Re: Issue with ACHI


  8. #8
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    Default Re: Issue with ACHI

    Quote Originally Posted by NуроFеn View Post
    i read your post, can u fix the problem by updating BIOS? my mother board has the newest bios already, i will try to downgrade it to see what happens.

  9. #9
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    Default Re: Issue with ACHI

    does your hdd not work in ahci? or your dvd drive or both? try disabling native sata port 0-3
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  10. #10
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    Default Re: Issue with ACHI

    You need to return to IDE mode in BIOS first to properly use Windows. And then you can prepare Windows for change. And then you can return to AHCI in BIOS.

    Just note. If you can't figure out the problem, there is a sure but last resort method to resolve your issue. You would have to set BIOS settings to what you want. And then reinstall Windows, making sure to click on the "format" option when asked to choose partition for installation.

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