AHCI, can someone explain?

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  1. Posts : 13,354
    Windows 7 Professional x64
       #1

    AHCI, can someone explain?


    After some Google searching, I think I need a dumbed-down explanation: what the heck is AHCI? Is it a desirable setting?
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  2. Posts : 2,913
    Windows 7 Ultimate x64 SP1
       #2

    AHCI (Advanced Host Controller Interface) allows you to hot swap drives. It also allows for native command queuing, which allows a drive to accept multiple commands at once, and also rearrange those commands to optimize performance. If you plan on hot swapping drives, it's something you should consider. Since it can also allow a drive to accept more than one command at a time, it can increase storage speed. If your system supports AHCI, and your drives support native command queuing, I suggest enabling it.
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  3. Posts : 3,960
    W7 x64
       #3

    Doesn't get any dumber than Wiki
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  4. Posts : 13,354
    Windows 7 Professional x64
    Thread Starter
       #4

    Now I see people here saying that in order to switch, you need to do a clean install. What does anyone think about this?
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  5. Posts : 2,913
    Windows 7 Ultimate x64 SP1
       #5

    Qdos said:
    Doesn't get any dumber than Wiki
    Except that the wiki entry doesn't actually bother to explain the concepts of NCQ or hot plug. That particular entry is pretty messy and would benefit from adding the actual explanations for the important components into the AHCI entry.
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  6. Posts : 3,960
    W7 x64
       #6

    kegobeer said:
    Qdos said:
    Doesn't get any dumber than Wiki
    Except that the wiki entry doesn't actually bother to explain the concepts of NCQ or hot plug. That particular entry is pretty messy and would benefit from adding the actual explanations for the important components into the AHCI entry.
    That was precisely why, in the context of dumb, I posted the link
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  7. Posts : 2,913
    Windows 7 Ultimate x64 SP1
       #7

    Jonathan_King said:
    Now I see people here saying that in order to switch, you need to do a clean install. What does anyone think about this?
    Personally, I'd opt for a reinstall. I scanned that thread, and with the differences between chipsets, the lack of a proper reg file for certain chipsets, etc, it would probably be faster to just back everything up, switch to AHCI, and then do a clean install. Plus, that's a thread for XP - I wouldn't use it for a Windows 7 installation.
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  8. Posts : 2,913
    Windows 7 Ultimate x64 SP1
       #8

    Qdos said:
    kegobeer said:
    Qdos said:
    Doesn't get any dumber than Wiki
    Except that the wiki entry doesn't actually bother to explain the concepts of NCQ or hot plug. That particular entry is pretty messy and would benefit from adding the actual explanations for the important components into the AHCI entry.
    That was precisely why, in the context of dumb, I posted the link
    Ah, I totally didn't get that. It's been a loooooooong day...
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  9. Posts : 13,354
    Windows 7 Professional x64
    Thread Starter
       #9

    kegobeer said:
    Jonathan_King said:
    Now I see people here saying that in order to switch, you need to do a clean install. What does anyone think about this?
    Personally, I'd opt for a reinstall. I scanned that thread, and with the differences between chipsets, the lack of a proper reg file for certain chipsets, etc, it would probably be faster to just back everything up, switch to AHCI, and then do a clean install.
    Thank you for your input. I will wait and get a few more responses, but your post had been duly noted.
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  10.    #10

    Kegger can you enlighten us on what would make a RAID config worthwhile for Windows 7 since we are getting many problems with 7 install to RAID. Supposedly Intel suggests RAID config for AHCI (in the Wiki). How would that work?

    Dude yesterday with SATA had IDE enabled but found AHCI choice in BIOS, then turned out AHCI driver was on mobo CD which he loaded into installer and fixed stall.

    Should we even bother trying for AHCI if it is not in BIOS menu? Another way to enable it on mobo?
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