Prevent caching of 404 responses

[Paul Beckett <paul_beckett@xxxxxxxxxxx>]

I'm running Apache 2.4.10, and using mod_cache_disk . Some of my web content is from flatfiles stored on an NFS export. I think these are occasionally going AWOL, resulting in 404 responses, which appear to then be cached by Apache.

Is there any way to restrict what HTTP response codes are cached by Apache, ideally I would like to only cache 200,301,302 responses.

Thanks,

Paul