parallel datapump export to multiple directoy objects

I have a rather short window to do a 90 gb datapump full db export. Going to use parallel. My understanding is that when you do a parallel expdp, oracle creates 1 file for each parallel slave. I have several different disk devices loaded as mount points. Is it possible to use multiple directory objects in one expdp to spead out the IO?

yeah i know, doesn't mean it will help due to how devices are laid out. just wondering if its possible. i did some googling and did not see how to do this.

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