Curious questions regarding 64-bit apps on a W2K8 64-bit server

Discussion in 'Windows 64bit' started by AllenM, May 27, 2009.

  1. AllenM

    AllenM Guest

    I also posted this in a few other windows server NG's so pardon the double
    posting. I didn't know there was a 64-bit NG. It would be great to get as
    many opinions as possible. Thanks.

    I got a DELL 64-bit server that I am configuring with W2K8 Standard 64-bit.
    I've got plenty of disk space and made my C: partition 60GB. I noticed by
    default W2K8 created a C:|Program Files and a C:\Program Files (x86)
    directories. Pretty much self explainatory. When I load 64-bit apps by
    default the install directory points to C:\Program Files I assume because it
    recognizes the application as being a 64-bit app. On the other hand when I
    load a 32-bit application be default the install directory points to
    C:\Program Files (x86). So my question is are 64-bit applications "required"
    to be installed in the C:\Program Files directory in order for it to be
    recognmized and run as a 64-bit app or can I create and install all my
    64-bit and 32-bit applications on a different partition such as D:\Program
    Files for 64-bit apps and D:\Program Files (x86) for 32-bit apps?
    AllenM, May 27, 2009
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  2. As posted over on SBS NG, yes, you can install to D:\Program Files and
    D:\Program Files (x86) if you wish. Just make sure you don't mix and match
    32-bit and 64-bit applications in the same directory tree - that can get
    messy, especially since the file system (and registry) is viewed somewhat
    differently by 32-bit and 64-bit applications.

    An example of the file system differences. A 64-bit application uses the
    %windir%\System32 directory. It can also see (but doesn't normally use) the
    %windir%\SysWOW64 directory. A 32-bit application only sees the
    %windir%\SysWOW64 directory, _but it sees it as %windir%\System32._ (And if
    that doesn't confuse you the first time you see it, you're better than the
    rest of us!)
    Charlie Russel - MVP, May 27, 2009
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  3. AllenM

    AllenM Guest

    No more confusion. thanks charlie.

    AllenM, May 28, 2009
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