HFS Extent Tables

[shake]

hi there,
i dont know if this is the right place to post this, but here goes....
i was going through files on my HD's and noticed a file called HFSExtentTables. what is this file for? is it needed?

any help is appreciated.
thanks,
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[TEG]

I believe it is the extension to allow Darwin to access the HFS+ and HFS hard drive formats. Othwise, UFS must be used. Do not delete, otherwise you'll have to use OS9.

TEG