grub alert

Dear All, I need your help in order to solve a problem with grub that is the first time I am having. My PVE infomed me that some updates are available as per picture in attachment I have applied the updates and as always process starts, at a certain point while upgrading grub I have got the...

proxmox 3.4 error unknown file system entering rescue mode grub rescue> Hello, I started getting this error after my dell r710 server lost power and a hdd in the raid 10 needed to be rebuilt. I rebuilt the raid and still.got the same error.message. I tried to reinstall grub from the grub...