When I upgrade from ubuntu 12.04 to 14.04 or do a clean installation I get:
Error: diskfilter writes not suported.

I have looked around on previous posts and the suggested solutions have not worked for me. I have a working version of 12.04 with zimbra on it so I don't want to go forward with upgrading unless I'm certain I have a working solution.

I have tried many things including replacing etc/grub.d/10_linux with quick_boot="1" with quick_boot="0" etc.

Another question would also be what is a diskfilter?

I am eager to look at having 14.04 up and running as 12.04 will be going out of support at some stage. I'm going to kick up a virtual box to see if I can replicate the issue in some way.

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