How to fix disk in Emergency mode
On FreePBX system, when you force rebooted a server, it may go into Emergency mode with error "XFS_WANT_CORRUPTED_GOTO" and not fully up. So to fix it, just go to Console and type "xfs_repair -L /dev/dm-0" (without quotes) then when it is done, just type exit
On different version, command to run check disk could be different, like
fsck -y /dev/mapper/debian--vg-root