UPDATE:


I completely understand frustration, and you can't imagine how was I frustrated in a monring. Have no idea why I was given with some many challenges from beginning, but will try to stay professional and the update as following.

Currently machine is being restored on backup disk, once it is done I will bring it up on backup disks, they are slower, but should not be an impact for end user.
Meanwhile we will be back online, I will prepare spare disks in main array and will prepare system to boot there. And will swap later to production machine

The state we will restore will be time of crash, which is 8hours ago.