Join the nixCraft community via RSS Feed, Email Newsletter or follow on Twitter. He wrote more than 7k+ posts and helped numerous readers to master IT topics. Vivek Gite is the founder of nixCraft, the oldest running blog about Linux and open source. Forcefully unmount a disk partition under FreeBSD and Solaris Unix operating system.For more info see the documentation for the following commands using the man command or help command: Summing upĪnd that is how you forcefully unmount the Linux disk. Please note that using these commands or options can cause data loss for open files programs which access files after the file system has been unmounted will get an error. -f: Force unmount in case of an unreachable NFS system.If you would like to unmount a NFS mount point then try following command: This option works with kernel version 2.4.11+ and above only. Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore. You can also try the umount command with -l option on a Linux based system: Try relaunching Finder by control+option+clicking on the Finder icon in your Dock and selecting Relaunch. In this example, use the lsof command to find out who is using a file system named /dev/sda1:Ĭlick to enlarge Linux umount command to unmount a disk partition 2 Usually this error means that some file on the partition is in use. I have a PNY 128gb flash drive that I can no longer modify (cant delete files). The -u option is passed to the fuser to append he user name of the process owner to each PID. How do I list the users on the file-system /nas01/?
In other words, I am using the lsof to find out who is using a file system and then taking action to close the app or users accessing the file system. Then, when booting, hold down the Option key to select Recovery Partition. As soon as that program terminates its task, the device will no longer be busy, and you can unmount it with the following command. All you have to do is stop the vi process and umount again. The above output tells that a user named ‘vivek’ has a vi process running and using /dev/sda1 disk device under the Linux system. For example, if your device name is /dev/sdb1, enter the following lsof command as the root user: Hence, try the following command to determine the processes’ activities on the device/partition. There are many reasons for this, such as programs accessing partitions or open files, but the most important one is to prevent the data loss on a mounted file system. 1 Press the Win + R keys to open Run, type diskmgmt.msc into Run, and click/tap on OK to open Disk Management. Linux / UNIX will not allow you to unmount a busy disk device.
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