How do you force a CIFS connection to unmount

Question

I have  a CIFS share mounted on a Linux machine   The CIFS server is down  or the internet connection is down  and anything that touches the CIFS mount now takes several minutes to timeout  and is unkillable while you wait   I can t even run ls in my home directory because there is a symlink pointing inside the CIFS mount and ls tries to follow it to decide what color it should be   If I try to umount it  even with -fl   the umount process hangs just like ls does    Not even sudo kill -9 can kill it   How can I force the kernel to unmount

User · Answer

umount -a -t cifs -l  worked like a charm for me on CentOS 6 3   It saved me a server reboot

User · Answer

I had a very similar problem with davfs  In the man page of umount davfs  I found that the        -f -l -n -r -v options are ignored by umount davfs  To force-unmount my davfs mount  I had to use umount -i -f -l  media davmount

User · Answer

Try umount -f  mnt share  Works OK with NFS  never tried with cifs   Also  take a look at autofs  it will mount the share only when accessed  and will unmount it afterworlds   There is a good tutorial at www howtoforge net

User · Answer

I had this issue for a day until I found the real resolution  Instead of trying to force unmount an smb share that is hung  mount the share with the  soft  option  If a process attempts to connect to the share that is not available it will stop trying after a certain amount of time      soft    Make the mount soft   Fail file system calls after a number of seconds    mount -t smbfs -o soft   username server share  users username smb share  stat  users username smb share file stat   users username smb share file  stat  Operation timed out   May not be a real answer to your question but it is a solution to the problem

User · Answer

On RHEL 6 this worked   umount -f -a -t cifs -l

User · Answer

I had this issue for a day until I found the real resolution  Instead of trying to force unmount an smb share that is hung  mount the share with the  soft  option  If a process attempts to connect to the share that is not available it will stop trying after a certain amount of time      soft    Make the mount soft   Fail file system calls after a number of seconds    mount -t smbfs -o soft   username server share  users username smb share  stat  users username smb share file stat   users username smb share file  stat  Operation timed out   May not be a real answer to your question but it is a solution to the problem

User · Answer

I had a very similar problem with davfs  In the man page of umount davfs  I found that the        -f -l -n -r -v options are ignored by umount davfs  To force-unmount my davfs mount  I had to use umount -i -f -l  media davmount

User · Answer

Try umount -f  mnt share  Works OK with NFS  never tried with cifs   Also  take a look at autofs  it will mount the share only when accessed  and will unmount it afterworlds   There is a good tutorial at www howtoforge net

User · Answer

I use lazy unmount  umount -l  that s a lowercase L      Lazy unmount  Detach the filesystem   from the filesystem hierarchy now  and   cleanup all references to the   filesystem as soon as it is not busy   anymore    Requires kernel 2 4 11 or   later

User · Answer

On RHEL 6 this worked for me also   umount -f -a -t cifs -l FOLDER NAME

User · Answer

A lazy unmount will do the job for you   umount -l  lt mount path gt

User · Answer

umount -f -t cifs -l  mnt  amp    Be careful of  amp   let umount run in background  umount will detach filesystem first  so you will find nothing abount  mnt  If you run df command  then it will umount  mnt forcibly

User · Answer

Try umount -f  mnt share  Works OK with NFS  never tried with cifs   Also  take a look at autofs  it will mount the share only when accessed  and will unmount it afterworlds   There is a good tutorial at www howtoforge net

User · Answer

umount -a -t cifs -l  worked like a charm for me on CentOS 6 3   It saved me a server reboot

User · Answer

I use lazy unmount  umount -l  that s a lowercase L      Lazy unmount  Detach the filesystem   from the filesystem hierarchy now  and   cleanup all references to the   filesystem as soon as it is not busy   anymore    Requires kernel 2 4 11 or   later

User · Answer

I use lazy unmount  umount -l  that s a lowercase L      Lazy unmount  Detach the filesystem   from the filesystem hierarchy now  and   cleanup all references to the   filesystem as soon as it is not busy   anymore    Requires kernel 2 4 11 or   later

User · Answer

Try umount -f  mnt share  Works OK with NFS  never tried with cifs   Also  take a look at autofs  it will mount the share only when accessed  and will unmount it afterworlds   There is a good tutorial at www howtoforge net

User · Answer

umount -f -t cifs -l  mnt  amp    Be careful of  amp   let umount run in background  umount will detach filesystem first  so you will find nothing abount  mnt  If you run df command  then it will umount  mnt forcibly

User · Answer

This works for me  Ubuntu 13 10 Desktop to an Ubuntu 14 04 Server   -   sudo umount -f  mnt my share   Mounted with    sudo mount -t cifs -o username me password mine   192 168 0 111 serv share  mnt my share   where serv share is that set up and pointed to in the smb conf file

User · Answer

On RHEL 6 this worked   umount -f -a -t cifs -l

User · Answer

There s a -f option to umount that you can try   umount -f  mnt fileshare   Are you specifying the  -t cifs  option to mount   Also make sure you re not specifying the  hard  option to mount   You may also want to consider fusesmb  since the filesystem will be running in userspace you can kill it just like any other process

User · Answer

There s a -f option to umount that you can try   umount -f  mnt fileshare   Are you specifying the  -t cifs  option to mount   Also make sure you re not specifying the  hard  option to mount   You may also want to consider fusesmb  since the filesystem will be running in userspace you can kill it just like any other process

User · Answer

This works for me  Ubuntu 13 10 Desktop to an Ubuntu 14 04 Server   -   sudo umount -f  mnt my share   Mounted with    sudo mount -t cifs -o username me password mine   192 168 0 111 serv share  mnt my share   where serv share is that set up and pointed to in the smb conf file

User · Answer

There s a -f option to umount that you can try   umount -f  mnt fileshare   Are you specifying the  -t cifs  option to mount   Also make sure you re not specifying the  hard  option to mount   You may also want to consider fusesmb  since the filesystem will be running in userspace you can kill it just like any other process

User · Answer

There s a -f option to umount that you can try   umount -f  mnt fileshare   Are you specifying the  -t cifs  option to mount   Also make sure you re not specifying the  hard  option to mount   You may also want to consider fusesmb  since the filesystem will be running in userspace you can kill it just like any other process

User · Answer

A lazy unmount will do the job for you   umount -l  lt mount path gt

User · Answer

I use lazy unmount  umount -l  that s a lowercase L      Lazy unmount  Detach the filesystem   from the filesystem hierarchy now  and   cleanup all references to the   filesystem as soon as it is not busy   anymore    Requires kernel 2 4 11 or   later

User · Answer

On RHEL 6 this worked for me also   umount -f -a -t cifs -l FOLDER NAME

[linux] How do you force a CIFS connection to unmount

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