How do I unmount a busy filesystem?

If possible, let us locate/identify the busy process, kill that process and then unmount the samba share/ drive to minimize damage:

  1. lsof | grep ” (or whatever the mounted device is)
  2. pkill target_process (kills busy proc.
  3. umount /dev/sda1 (or whatever the mounted device is)

How do I fix device or resource busy in Linux?

there are a lot of similar problem like “Device or resource busy”….Follow these steps:

  1. open Resource Monitor.
  2. click on “associated handles” drop box.
  3. search the folder creating problem.
  4. Right click on each process and “End process”.

Can we unmount?

Unmounting is not possible if the mount point is accessed by a process. For umount to be successful, the process needs to stop accessing the mount point. The lsof command lists all open file and processes accessing them in the provided directory.

How do I check if a disk is busy in Linux?

We can use iostat command to monitor system input/output device loading. It can be executed by any user, and is typically the first command used to investigate disk I/O issues at the command line. We can use iostat -xk interval to get the io status for our disks.

What is lazy unmount?

Lazy unmount detaches the filesystem from system hierarchy and clean up all references to our filesystem as soon as it is not busy anymore. This option is available only with kernel version 2.4.

How do you use a fuser?

In order to kill a processes accessing a file or socket, employ the -k or –kill option like so: $ sudo fuser -k . To interactively kill a process, where you are that asked to confirm your intention to kill the processes accessing a file or socket, make use of -i or –interactive option: $ sudo fuser -ki .

Why is device or resource busy?

Some directories cannot be deleted if the device or resource is busy. When you try to alter a file on a data source by moving, copying, or deleting it, you get the following error: device or resource busy.

How do you remove .NSF file in Linux?

So, in order to remove the file completely you must kill the process that has it open. If you want to know what process has this file open, you can use ‘lsof . nfs1234’. Note, however, this will only work on the machine where the processes that has the file open is running.

What happens when you unmount a file system?

The unmounting of a file system removes it from the file system mount point, and deletes the entry from the /etc/mnttab file. Some file system administration tasks cannot be performed on mounted file systems.

What happens if a FUSE filesystem request is interrupted?

If a process issuing a FUSE filesystem request is interrupted, the following will happen: If the request is not yet sent to userspace AND the signal is fatal (SIGKILL or unhandled fatal signal), then the request is dequeued and returns immediately.

How do I mount the fuse Control FileSystem?

There’s a control filesystem for FUSE, which can be mounted by: Mounting it under the ‘/sys/fs/fuse/connections’ directory makes it backwards compatible with earlier versions. Under the fuse control filesystem each connection has a directory named by a unique number. For each connection the following files exist within this directory:

Where does fuse do most of its debugging?

So majority of debugging is in userspace program, as the FUSE kernel module (and libfuse) is generically meant to be used by ALL FUSE filesystem. Thanks for contributing an answer to Stack Overflow!

How do I restrict file access in fuse?

By default FUSE doesn’t check file access permissions, the filesystem is free to implement its access policy or leave it to the underlying file access mechanism (e.g. in case of network filesystems). This option enables permission checking, restricting access based on file mode.