subzero79. Good call.
Yes, you are correct. The drive was filled at 100%. A quick removal of some huge files and web GUI admin work again....got into the system.
But I had another system a couple days ago, OMV running in a KVM based VM where I had a similar situation. It was a fresh install of OMV, no patches applied....so the disk was practically empty. Could not get into the web GUI. Don't have this VM any longer but I'll monitor the situation and see if it occurs again.
Thanks much for the help.