df: `/mnt/dbfs': Input/output error

HI,i am not able to df on /mnt/dbfs. it is showing the following

df: `/mnt/dbfs': Input/output error

[root@xxx08 xxxx08]# grep /mnt/dbfs /etc/fstab
/sbin/mount.dbfs#       /mnt/dbfs       fuse    rw,user,noauto  0 0
[root@xxxx08 xxxx08]#


[root@xxxx08 /]# cd /mnt
[root@xxxx08 mnt]# ls -lrt
total 8
?--------- ? ?    ?       ?            ? dbfs
drwxr-xr-x 2 root root 4096 Jun 15 08:48 cdrom
drwxr-xr-x 2 root root 4096 Sep 19 23:31 test1
[root@xxxx08 mnt]#

Regards,
Ani