https://ecaps.wordpress.com/2018/10/04/openvz-failed-to-mount-image-error-in-e2fsck/

If you try to start VPS and got error messages like below then

vzctl start 192
Dump file /vz/dump/Dump.192 exists, trying to restore from it
Restoring container ...
Opening delta /vz/private/192/root.hdd/root.hdd
Data cluster 1112 beyond EOF, vsec=47137...
FATAL
Error in ploop_check (check.c:547): Fatal errors were found, image /vz/private/192/root.hdd/root.hdd is not repaired
Error in check_deltas (check.c:631): /vz/private/192/root.hdd/root.hdd : irrecoverable errors
Failed to mount image: Error in check_deltas (check.c:631): /vz/private/192/root.hdd/root.hdd : irrecoverable errors [11]
Starting container...
Opening delta /vz/private/192/root.hdd/root.hdd
Data cluster 1112 beyond EOF, vsec=47137...
FATAL
Error in ploop_check (check.c:547): Fatal errors were found, image /vz/private/192/root.hdd/root.hdd is not repaired
Error in check_deltas (check.c:631): /vz/private/192/root.hdd/root.hdd : irrecoverable errors
Failed to mount image: Error in check_deltas (check.c:631): /vz/private/192/root.hdd/root.hdd : irrecoverable errors [11] 

Try these command to fix it.

# ploop check -F /vz/private/192/root.hdd/root.hdd
# ploop mount /vz/private/192/root.hdd/DiskDescriptor.xml
# fdisk -l /dev/ploop46026
# e2fsck /dev/ploop46026p1
# vzctl start 207

Source: https://serverfault.com/questions/666443/openvz-containers-will-not-start-after-a-reboot