强制umount        umount -i -f /data/orcl/rman

[root@db1pri ~]# df -Th
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/sda3     ext4     18G  9.3G  7.6G  56% /
tmpfs        tmpfs     25G  7.6G   18G  31% /dev/shm
df: `/data': No such file or directory
df: `/data/orcl/rman': No such file or directory
df: `/data/orcl/archive_log_bak': No such file or directory
df: `/data/orcl/archive_log': No such file or directory
[root@db1pri ~]# umount /data/orcl/rman
/data/orcl/rman was not found in /proc/mounts
/data/orcl/rman was not found in /proc/mounts
[root@db1pri ~]# umount -i -f /data/orcl/rman
umount2: No such file or directory
umount: /data/orcl/rman: not found
umount2: No such file or directory
[root@db1pri ~]# df -Th
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/sda3     ext4     18G  9.3G  7.6G  56% /
tmpfs        tmpfs     25G  7.6G   18G  31% /dev/shm
df: `/data': No such file or directory
df: `/data/orcl/archive_log_bak': No such file or directory
df: `/data/orcl/archive_log': No such file or directory
[root@db1pri ~]# umount -i -f  /data/orcl/archive_log_bak
umount2: No such file or directory
umount: /data/orcl/archive_log_bak: not found
umount2: No such file or directory
[root@db1pri ~]# umount -i -f  /data/orcl/archive_log
umount2: No such file or directory
umount: /data/orcl/archive_log: not found
umount2: No such file or directory
[root@db1pri ~]# umount -i -f /data
umount2: No such file or directory
umount: /data: not found
umount2: No such file or directory
[root@db1pri ~]# df -Th
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/sda3     ext4     18G  9.3G  7.6G  56% /
tmpfs        tmpfs     25G  7.6G   18G  31% /dev/shm
[root@db1pri ~]#