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Index.DAT versions - how many are there and what versions of the Windows O/S do they correspond to?

Hi, we all know that the Microsoft Internet Explorer cache file begins with "Client UrlCache MMF Ver 5.x", so that got me to thinking...how many versions of the cache file are there, and what versions of the Windows Operating System does each correspond to?

In other words, if I see "Client UrlCache MMF Ver 5.2", what version of the Windows O/S would that correspond to?

I have also posted a second questions (so you can get additional points) regarding this same topic, so if you'd like to view that questions I'd appreciate it.

The Title of the second question is: "List of the different file paths where the Index.DAT file is stored on the different versions of the Windows O/S."

Best Regards,
Fulano

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Steven Carnahan

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btan

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Mr_Fulano

ASKER

Thank you gentlemen...I asked this question because I remember once seeing "Client UrlCache MMF Ver 3.2" in an Index.DAT file and was wondering where that fell into the version list. I think those were the early days of the Index.DAT files when they were called MM2048.DAT and MM256.DAT in the early versions of IE.

Steven Carnahan

Those files were prior to IE4. Here is a description of what they were:

The Mm256.dat file is used to store the identification numbers of Web pages whose Web addresses are equal to or less than 256 characters. The Mm2048.dat is used to store the identification numbers of Web pages whose Web addresses are between 257 and 2048 characters.

They were replaced by the index.dat file in IE4.

Mr_Fulano

ASKER

Ahhhaaa! ...I see. Thank you! That makes sense, because those were used in the earlier versions of IE. Thank you!

Mr_Fulano

ASKER

Both very good answers. Thank you!