Centos disk XFS xfs_repair

1. During bootup, when the GRUB2 menu shows up, press the e key for edit
2. Add the following parameter at the end of the linux16 line, after quiet:

   quiet systemd.unit=emergency.target

3. Press Ctrl+x to boot the system with the parameter.
4. first find your device UUID in /dev/disk/by-uuid
5. umount

   umount /dev/disk/by-uuid/198s5364-a29c-429e-b16d-e772acd

6. repair

   xfs_repair /dev/disk/by-uuid/198s5364-a29c-429e-b16d-e772acd

Reboot

edit:
sometimes you have to force it by deleting the log file

xfs_repair -L /dev/disk/by-uuid/198s5364-a29c-429e-b16d-e772acd