Can't mount: /vz/root/100 /vz/private/100: No such file or directory

When you start a VPS, you may got this error:
Can't mount: /vz/root/100 /vz/private/100: No such file or directory


[root@testpc ~]# vzctl start 100
Starting container ...
Can't mount: /vz/root/100 /vz/private/100: No such file or directory


To fix this using


# umount /vz/root/100


then,


# vzctl start 100






.