Posting this as my personal reminder to not forget that statement. Found this out the hard way while attempting to install Oracle Database 11g R2 (32-bit) on Windows 2008 R2.
Oracle Support clearly states:
“Running 32-bit applications on a 64-bit operating system is generally referred to as “Compatibility-Mode” by many AMD64/EM64T hardware vendors. Irrespective of this terminology, 32-bit Oracle Database server is *not* certified on Windows x64. For the 32-bit Oracle database client, check the certification matrix for more details.”
Actually the Oracle database software installs without an issue. It is when I created the actual database that I encountered the same repeated errors in my alert.log after startup.
OER 7451 in Load Indicator : Error Code = OSD-04500: illegal option specified
O/S-Error: (OS 1) Incorrect function. !
Searching My Oracle Support points to Doc. ID 1060806.1 which states:
Installed 32-bit Oracle database software on a 64-bit MS Windows OS which is not supported.
Note: For the Database software, you can ONLY install the x64 version on MS Windows (x64). You can NOT install the 32-bit version Database software on MS Windows (x64)
Install 32-bit Oracle database software only on 32-bit MS Windows OS.