Are there any drivers for Adaptec 2940UW for Vista 64bit

Posted on 2009-02-17
Last Modified: 2013-11-14
Though the drivers for the Adaptec 2940UW SCSI card are included with Windows XP 64bit, they are not with Vista (at least, not part of the standard install). I have installed Vista x64 Ultimate and the only thing on my computer that does not work is my Adaptec 2940UW SCSI card and my Microtek Scanmaker III SCSI scanner.

Does anyone know where I can find the for Adaptec 2940UW for Vista x64 ?
Question by:rjjacques
    LVL 26

    Accepted Solution

    I don't see (on Adaptec's site) any 64-bit drivers for the SCSI card you're trying to use

    I did a bit of looking, and found this:
    In short, it offers two possible work-arounds:
     * Try the embedded 2940-family driver and ignore the warnings
     * Try the Adaptec AIC-7870 PCI SCSI Controller (Emulated).



    Author Closing Comment

    Using the emulated SCSI controller worked.
    My scanner is now found, but I am unable to get it to work (there is another thread for this "potentially hopeless" one...

    Expert Comment

    Hi, found this on googling as I have the 2940 also, will be looking to 64bit it when Windows 7 RTM hits MSDN.
    This is the answer to a similar question:-
    2904 is a like 2940 without Bios on the board. Both use aic78xx.sys driver

    so I suggest you "force" the device manager and select
    "Adaptec AHA-2940U/2940UW/2940D PCI SCSI Controller"

    you can also try edit WINDOWS\inf\pnpscsi.inf (with notepad.exe, and after
    backup original file)

    under the line
    %PCI\VEN_9004&DEV_8178.DeviceDesc% = aic78xx_Inst, PCI\VEN_9004&DEV_8178
    add the two lines :
    %PCI\VEN_9004&DEV_5078.DeviceDesc% = aic78xx_Inst, PCI\VEN_9004&DEV_5078
    %PCI\VEN_9004&DEV_5075.DeviceDesc% = aic78xx_Inst, PCI\VEN_9004&DEV_5075

    and under the line
    PCI\VEN_9004&DEV_8178.DeviceDesc = "Adaptec AHA-2940U/2940UW/2940D PCI SCSI
    add the two lines::
    PCI\VEN_9004&DEV_5078.DeviceDesc = "Adaptec AIC-7850 PCI SCSI Controller"
    PCI\VEN_9004&DEV_5075.DeviceDesc = "Adaptec AIC-7550 PCI SCSI Controller"
    Of course, this is without official support

    Thanks for that!

    I edited the x64 version of \windows\inf\pnpscsi.inf to copy these lines
    from the 32-bit version .inf:
    %PCI\VEN_9005&DEV_0011.DeviceDesc% = aic78u2_Inst, PCI\VEN_9005&DEV_0011
    PCI\VEN_9005&DEV_0011&SUBSYS_01819005.DeviceDesc = "Adaptec AHA-2930U2 -
    Ultra2 SCSI"

    I added those after the "_0010" version of each line. Then I used the Add
    Hardware Wizard and guided it to the updated pnpscsi.inf file. And it
    worked! So far, at least. The volumes on the SCSI drive
    show up in My
    Computer and Windows Explorer. If further testing reveals a problem, I'll
    let you know. As you said, "Of course, this is without official support."

    Thanks go to Gilles Vollant for this info info and it was to be uploaded onto

    I must reiterate "Of course, this is without official support"


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