Just booted to parted magic and as I opened gparted, it showed a warning with GPT partition not fully set up. After I allowed the fix, it showed the empty space. I just grown it and I'm booting into OMV again to see.
It could be that the clonezilla I used was an old version. This one I used now has only two weeks.
PD: Do you find possible to move the AUFS poolshare to the parity disk?
PPD: It's normal to have the / folder full of deb packages?
During the today's update more errors showed while applying the new kernel. Something like no dkmg file or anything.