Based on your post above, it's really confusing why you don't just type it in and share out as you've yet to show the output of the actual flow of the error, which is problem solving 101 we are working on. Do you only ever get the fusermount error in systemd though? Here is an example working systemd that unmounts properly: and then I tried to fusermount, so it called fusermount and killed the process and sometimes it must have killed it before the unmount causes the invalid arg (like mount wasnt up or didnt exist). So the summary is: process having a file opened that was removed. @bitinerant the dangerous part is "as soon as it is not busy anymore" (which is an indefinite time frame) if you try and mount that thing again in that time. Or, do umount and mount again, try umount -l : lazy umount if facing any issue on normal umount. Riffing off of Prabhat's question above, I had this issue in macos high sierra when I stranded an encfs process, rebooting solved it, but this. df: '/mnt/restic': Transport endpoint is not connected. (Please give as answer a simple "unlock this" method, and not complete articles like this one. renaming the parent directory always worked for me. I'm not sure what causes this, it probably happens during a reboot or when the service is restarted. @ChoyltonB.Higginbottom as you asked for a safer way to prevent. So I guess I mounted it twice in the end to the same location? So it seems like this happens when the mount is in use when running fusermount -uz, The mounts have disappeared from the mtab and now the OS refuses to unmount them. . Connect and share knowledge within a single location that is structured and easy to search. I shared it all already. How do I profile C++ code running on Linux? Improve this answer. If you can't fusermount it, you should work on fixing that error. What's the linux equivalent? kill -9 did not work even after fusermount -zu /mount/point or umount -l /mount/point (which worked). He wanted an interactive shell in the middle of a script. If a mount point I connected to the other active screen session and its shell wasn't even currently sitting in the mounted directory. Check with: For loopback mounts, also check the output of: These are the most elusive type of pokemon, and appear in lsof's TYPE column as a_inode (which is undocumented in the lsof man page). Shell code to check if a device or file with spaces in the path is mounted, About mounting and umounting inherited mounts inside a newly-created mount namespace, mount -a works, but fails at boot with "can't find UUID". This post reminded me that I had the nfs service running after several hours of trying to figure this out. Well, you could have, but fuser operates upon a directory, not a device, so if you wanted to remove the mountpoint from the file name space and still use fuser, you'd need to: This is more convoluted[1], but allows you to use: which will interactively ask to kill the processes with files open for writing. I had this problem when an automated test created a ramdisk. Can patents be featured/explained in a youtube video i.e. "Device or resource busy" . In my case it was docker that was holding the file. init 4 Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? I experience this frequently on servers that have NFS network file systems. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Connect and share knowledge within a single location that is structured and easy to search. Make it be unmounted automatically as soon as the directory is not busy anymore? run below command to find out the processes using by a filesystem: It will show how many processes holding/using the filesystem. Jordan's line about intimate parties in The Great Gatsby? In my case, I had a terminal open with the working directory inside the mounted one. [ 28.271625] sd-umoun [2228]: Failed to unmount /oldroot: Device or resource busy. I'm not sure whether quotas could ever prevent an unmount I was clutching at straws. I installed file lede-17.01.-r3205-59508e3-mvebu-linksys-wrt3200acm-squashfs-factory.img on a WRT3200ACM, and have noticed that upon reboot the device reverts back to the default configuration, all changes that I could have made are lost. ncw is on vacation for another week or so tagging him really doesn't do much but spam him as the issue seems to be systemd related and what you are doing but with no logs/output/ reproduced error and you going "it's broken", you won't ever fix it. The major unmount achievement to be unlocked is the read-only remount. Make sure that you aren't still in the mounted device when you are trying to umount. linux . It was caused by a process holding an open descriptor to a file that had been replaced by some command, which was executed when the filesystem was read-write. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? if I take out -z, I get device busy error. Each -virtio-fs device instance requires its own virtiofsd process. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, Can't access folders mounted by sshfs after sleep (or when connection lost), mdadm, Device or resource busy when adding sda, Mysterious 'Device or resource busy" message, Trying to read a serial port, device or resource busy. How did you find out fast-list does nothing on a mount? I hope @ncw will have some thoughts. 542), We've added a "Necessary cookies only" option to the cookie consent popup. MNT_DETACH (since Linux 2.4.11) Perform a lazy unmount: To subscribe to this RSS feed, copy and paste this URL into your RSS reader. sd-umoun[3621]: Failed to unmount /oldroot: Device or resource busy sd-umoun[3622]: Failed to unmount /oldroot/dev: Device or resource busy shutdown[1]: Could not detach DM /dev/dm-2: Device or resource busy shutdown[1]: Could not detach DM /dev/dm-0: Device or resource busy shutdown[1]: Failed to finalize file systems, DM devices, ignoring. Would this error happen if the device is busy and it needs to wait for it to unmount but then times out? Share some output rather than it doesn't work. I think your suggestion is incorrect. Learn more about Stack Overflow the company, and our products. umount -l and umount -f is not good enough for my situation. Connect and share knowledge within a single location that is structured and easy to search. lsof 36304 root cwd DIR 8,21 4096 1048577 /media I read your top post when you posted it and it seems you have changed it with new commands so no one would know to go back and check the top post. Jordan's line about intimate parties in The Great Gatsby? It doesn't actually unmount the device, it just removes the filesystem from the namespace. You either have a bad source of information or are just making stuff up. It will show how many processes holding/using the filesystem. If you're used to contributing on GitHub this is a super quick PR, and if you aren't, it'll be a good and simple introduction to contributing to projects. Asking for help, clarification, or responding to other answers. It only takes a minute to sign up. You didn't post any again so we're back at not being helpful without any output to look at. This in itself doesn't unmount the filesystem, but sometimes it's an alternative way of getting your system unstuck. The nixCraft or author is not responsible for data loss. NFS cannot remove a file that is used. Already on GitHub? FUSE has to support that since processes can die at any time; all processes will get a Transport endpoint is not connected error if they try to access the filesystem. However if umount -l didn't work I can't imagine this would be much different. What tool to use for the online analogue of "writing lecture notes on a blackboard"? Meaning of a quantum field given by an operator-valued distribution. 12G/data1 All pending data has been written to disk. Making statements based on opinion; back them up with references or personal experience. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Where, -k : Kill processes accessing the file. mount options -u unmount -q quiet -z lazy unmount (works even if resource is still busy) AUTHOR. The one that matters most is a log file and the loglevel. I thought it would load the entire dir structure in memory for the mount, so if you ran ls or du -h on the mount it would be fast. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. If you are using Asuswrt-Merlin, you need to install, you need to sudo lsof to get some results, Exactly, simply having current folder (located on target device) opened in your terminal (through e.g. Still happens with allow empty removed. fdisk /dev/sdb Failed to mount oldroot: Device or resource busy Installation & Boot. How does a fan in a turbofan engine suck air in? I had to unmount it the same number of times that I had run the mount command, i.e. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? (You'll need to run umount on the mountpoint twice if you've bind mounted a mode 000 directory on top.). Hello everybody, thank you to have clicked on my topic :D I explain my problem: I wanted to do a nandroid backup, before installing a rom on my P9 with TWRP(version 3.1.1-0), I have selected "Boot," "System," and "Data" (as usual) But a message. $ sudo umount -l ~/gdrive OK sudo Memo It has a lot of options, so check the man page, but if you want to see all open files under a directory: lsof +D /path. If you want to unmount something you have to "leave" it, otherwise it is of course in use and the system doesn't want to unmount it. All files in a file system must be closed before the file system can be unmounted. By clicking Sign up for GitHub, you agree to our terms of service and Can a VGA monitor be connected to parallel port? by name | kill PID | killall target_process), umount /dev/sda1 (or whatever the mounted device is). It would be more complex trying to only add the arg if it's non-default. Your answer helped me sort out a similarly exported NFS share. yum EPEL Gave warnings that lstat cannot execute and that the information may be incomplete, and didn't list the culprit. Booted into the bootloder, wait in the boot loader menu and flash the TWRP image sudo fastboot flash recovery /path/to/twrp-3..2--hammerhead.img Thanks for the tip! Some program is using a file in the filesystem you're trying to unmount. The before you shared worked. the device is busy for as long as there is another shell with "cd" to somewhere under that mount. @psusi, that is incorrect. Stopping DBFS failed as shown: (/etc/netatalk/afp.conf has in it the share assignment) The best answers are voted up and rise to the top, Not the answer you're looking for? Thank you! You can see the fusermount exited with 0. it seems to be related to when I unmount or restart the service as my sudo user (using sudo). Exiting the terminal or changing directories to a local share then running fusermount -u solves my problems. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, A more general answer addressing more causes for failing umount is found here. 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. Connect and share knowledge within a single location that is structured and easy to search. It only takes a minute to sign up. It has that in there. that's the systemd file with the args, what more do you need? What are the consequences of overstaying in the Schengen area by 2 hours? I have an s3fs-fuse "device" mounted at /mnt/s3. 542), We've added a "Necessary cookies only" option to the cookie consent popup. Would love your thoughts, please comment. Occasionally, when files have to be copied over, it is remounted read-write: This time however, mount kept giving the mount: / is busy error. Your fuser suggestion was very helpful when booted into the Arch Linux installation media which doesn't come with lsof by default. rev2023.3.1.43266. I only really use TDrive. 1 : 2020.02.29, ( ) . All I'm doing is running the service and stopping the service and I get that error. One nuance, if you are logged in through FTP client, you have to logout in order to successfully unmount folder. I tried the -z option, and can confirm it do the trick, but this precisely too much looks like a trick: what does it do exactly? at least right now, the ps grep is clean. https://rclone.org/flags/ FreeNAS-11.3-U3.2 This is kind of a strange one to me. Thanks for this advice. In summary: The useful behaviour of umount -l is hiding the filesystem from access by absolute pathnames, thereby minimising further moutpoint usage. rev2023.3.1.43266. You signed in with another tab or window. Grab a ps -ef | grep rclone and see what's running. Ubuntu 18.04 LTS, completely updated with latest packages and dist-upgraded as of today. The tool you want is lsof, which stands for list open files. How do I exclude a directory when using `find`? Would the reflected sun's radiation melt ice in LEO? You can the config values I'm using, but I honestly don't think it matters. Why does fusermount prepend /home to the path when the resource is busy? The tool you want is lsof, which stands for list open files. The program drops privileges where . I tried killing most of the processes in the order specified in the 0 runlevel too, just in case the order was relevant in my case, but that didn't help either. Anyway, I'm certain it happens when the mount is being used (like a ls call or plex scan or something) and its lazy unmounted. As a complementary, in this case, your lsof | grep path-to-be-unmounted must have below output: NB: do not use completition for the path as this will also freeze the terminal. By accident I found out how to get rid of a ramdisk. PTIJ Should we be afraid of Artificial Intelligence? Debian - cannot delete /etc/group- -- "Device or resource busy". I mounted a remote file system using sshfs (version 2.8.4). MNT_FORCE or MNT_DETACH. You need to order your service files properly so the last thing that gets unmounted is your fuse mounted drive. Here it was a /mnt/dev bind to /dev that I had created to be able to repair my system inside from the chroot jail. -h print help -V print version -o opt [,opt.] To learn more, see our tips on writing great answers. My goal is 100% to not be abrasive nor an asshole so I'm sorry if you feel that way as I sincerely apologize. This flag cannot be specified with either I am running ZFS, and after lazy umounting the volume, I got an error message: Which is not a mysql run in the same userspace, but within a container. Doing manually worked, though. This option is acceptable from a shell script; for command line interaction, the use of the -z option is more handy, but one must probably be aware the man page does not document it and there may be doubt about what it exactly do. If you have a zfs pool on that device, at least when it's a file-based pool, lsof will not show the usage. If you want a lazy unmount, that will wait forever until the IO is done to get unmounted. Basically, if the mountpoint is mounted under the / filesystem, you'd want to avoid this. expired. I don't know, not documented, so unsafe. When shutting down or rebooting the system, the following messages can be seen on the console [FAILED] Failed unmounting /var. Failed to mount '/system' (Device or resource busy) Failed to mount '/vendor' (Device or resource busy) And . Torsion-free virtually free-by-cyclic groups, "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow, Drift correction for sensor readings using a high-pass filter. lsof /path, lsof +f -- /path, and fuser /path all return nothing. I already have code to recognize shared drives (from a SQL table) and mount them in a special directory where all users can access them. Doing manually worked, though. They won't appear in lsof +f -- /dev/, so you'll need to: For killing processes holding anonymous inodes, see: List current inotify watches (pathname, PID). Running Ubuntu, man fusermount tells about a -z option, which is documented as lazy unmount. But you can simply run. But if the process that is using the file is not on your side you just can't do anything from your side, and you must find if it's the server or another nfs client that is locking the file. that's providing the fileystem. Failed to unmount /oldroot: Device or Resource busy Failed to unmount /oldroot/dev/pts: Device or Resource busy Failed to unmount /oldroot/dev: Device or Resource busy Failed to unmount /oldroot/sys: Device or Resource busy Sometimes it's visible on the screen, sometimes it's covered by the splash. run below command to find out the processes using by a filesystem: fuser -cu /local/mnt/. For me, the offending process was a daemon running in a chroot. umount a busy device without killing process? Sign in [*] All kadaitcha men are liars. Before unmounted the filesysem. Make your own judgement as to whether to make them close files, kill them, or defer the unmount operation. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Even if you've got some lurking gremlin which is preventing you from fully unmounting the device, you have at least got your filesystem in a consistent state. Kill all the processes and then you will able to unmount the partition/busy device. Firdaus Ahmad June 20, 2020 Problem Solving 1 Comment. Bacon saved. How can I update NodeJS and NPM to their latest versions? :Vue-cli3,.,..MacnatappInvalidHostheadernatapp,natapp,127.0:8080(),Vue, . is there a chinese version of ex. Then those messages shows up for second. You were able to reproduce it! Cloud storage cannot be mounted. . it's the same as before. I have another mount (tdrive) which is used by plex. The "restic" mount apparently failed to un-mount automatically. If you believe the question would be on-topic on another Stack Exchange site, you can leave a comment to explain where the question may be able to be answered. https://rclone.org/commands/rclone_mount/#systemd. You can then use lsof +f -- /dev/device to list all processes with open files on the device containing the filesystem, and then kill them. PTIJ Should we be afraid of Artificial Intelligence? That's not helpful. w Is your shell's current directory on the mountpoint path? If you just use "-u" and you have something accessing a file, it will not unmount as the device is busy, which is the correct message. That doesn't return anything. 'If you use -uz, it'll unmount and kill the process once the filesystem is not in use: The filesystem is huge, so lsof +D /path is not a realistic option. The community reviewed whether to reopen this question last year and left it closed: Original close reason(s) were not resolved. The number of distinct words in a sentence. This changed in version 2.34. How can I recursively find all files in current and subfolders based on wildcard matching? The best answers are voted up and rise to the top, Not the answer you're looking for? How do I delete an exported environment variable? So I guess it depends on what you want to do. I had forgotten to unmount a dual partitioned thumb drive with a mountpoint on /dev/hda1 first. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Programs accessing target DEVICE/NFS files may throw errors OR could not work properly after force unmount. The nfs-kernel-server probably goes behind the normal open files and thus is not listed by lsof and fuser. lsof could not find any open files but, Yep, worked for me, too. Thanks for contributing an answer to Super User! I often see "device busy" with sshfs when I have a terminal window open to a directory on the sshfs share. What output? There is a minimal progress feedback, so that one know what's going on and don't believe it's hanged. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, How to determine why "target is busy" (why it won't unmount)? So I restarted the netatalk daemon on the server. So here is another option, more verbose, but safer: tries to unmount until it successes, as many time as needed, in a loop. That's the same behavior I'm seeing. ( tdrive ) which is documented as lazy unmount -l and umount -f is not responsible for data loss some! Overstaying in the middle of a quantum field given by an operator-valued distribution stands. Even if resource is busy and it needs to wait for it to unmount but times. One that matters most is a question and answer site for users of Linux FreeBSD! One to me which stands for list open files run the mount,. On fixing that error I often see `` device busy error mountpoint twice if you ca n't imagine would. Feedback, so that one know what 's running run umount on the mountpoint is mounted under the /,! Directory when using ` find ` process having a file in the Great Gatsby in to! My video game to stop plagiarism or at least enforce proper attribution use for the online analogue ``... | grep rclone and see what 's running patents be featured/explained in a chroot can a VGA be... The directory is not connected my system inside from the chroot jail paying fee... It to unmount but then times out mount again, try umount -l: lazy if! Device/Nfs files may throw errors or could not work properly after force unmount last that! Kill -9 did not work properly after force unmount using, but I honestly do n't think it.. Amp ; Boot further moutpoint usage 10,000 to a local share then running fusermount -u my. Linux Installation media which does n't work: & # x27 ; /mnt/restic & x27. The tool you want is lsof, which is used by plex parallel port not responsible for loss! Ever prevent an unmount I was clutching at straws error in systemd though delete... Automatically as soon as the directory is not connected system can be unmounted automatically as soon the... Option, which stands for list open files and thus is not busy anymore Angel of the Lord say you... Responding to other answers can the config values I 'm doing is the. With sshfs when I have a terminal open with the working directory inside the mounted directory matters most is log! Opt. is documented as lazy unmount ( works even if resource is busy busy. As of today unlock this '' method, and not complete articles like this.... Kill them, or defer the unmount operation instance requires its own virtiofsd process -9 did not work properly force... Inside the mounted directory very helpful when booted into the Arch Linux Installation media which does n't the... /Path all return nothing I restarted the netatalk daemon on the console [ Failed ] Failed unmounting /var,,! Service running after several hours of trying to unmount a dual partitioned thumb drive with a mountpoint on first! Print version -o opt [, opt. again, try umount -l hiding... System inside from the chroot jail have to logout in order to successfully unmount folder itself does n't unmount! Information or are just making stuff up 10,000 to a directory when using ` find `,. To do /mount/point ( which worked ) but I honestly do n't think matters. Answer you 're looking for not busy anymore fusermount: failed to unmount device or resource busy, the ps grep is clean the.! From me in Genesis to me you 've bind mounted a mode 000 directory on the mountpoint mounted. Accessing target DEVICE/NFS files may throw errors or could not work even after fusermount -zu /mount/point or -l... 'Re trying to unmount it the same number of times that I had the nfs service running after hours! Parallel port Transport endpoint is not listed by lsof and fuser it does n't unmount the.... ( which worked ) had to unmount /oldroot: device or resource busy & quot ; restic & quot device. Its shell was n't even currently sitting in the Great Gatsby accessing the file find. 'S radiation melt ice in LEO option to the warnings of a ramdisk monitor be connected to parallel?! Will show how many processes holding/using the filesystem you 're looking for open to a tree company being! What more do you need holding the file at straws can not remove a file in Great! Did you find out the processes and then you will able to repair my inside... Air in mountpoint twice if you want to do busy Installation & amp Boot... Added a `` Necessary cookies only '' option to the path when the and... Nfs share or are just making stuff up -cu /local/mnt/ mount point I connected to the consent! More, see our tips on writing Great answers right now, the following messages can be seen on console! On writing Great answers ubuntu 18.04 LTS, completely updated with latest packages and dist-upgraded as of today https //rclone.org/flags/... Try umount -l is hiding the filesystem from the namespace are liars or whatever the mounted device when you n't. This '' method, and fuser /path all return nothing restic & quot ; mount apparently Failed unmount... And umount -f is not listed by lsof and fuser /path all return nothing on top. ) and its! After paying almost $ 10,000 to a directory when using ` find ` lsof could not find any files. To the same number of times that I had run the mount command, i.e and did n't list culprit... When using ` find ` a similarly exported fusermount: failed to unmount device or resource busy share on what want. I being scammed after paying almost $ 10,000 to a local share then running fusermount -u solves my.. 2020 problem Solving 1 Comment messages can be unmounted automatically as soon as the directory is not by. -O opt [, opt. '' to somewhere under that mount /dev/sda1 ( whatever. Warnings that lstat can not delete /etc/group- -- `` device or resource busy sure that you logged. To umount are logged in through FTP client, you should work on fixing that.... Mount again, try umount -l: lazy umount if facing any issue on normal umount docker that removed. 000 directory on top. ) that gets unmounted is your fuse mounted drive patents... Daemon on the console [ Failed ] Failed unmounting /var the top not. Forever until the IO is done to get rid of a strange one to me this, it happens... `` unlock this '' method, and our products up for GitHub, you 'd want do. Mount again, try umount -l is hiding the filesystem ; mounted at /mnt/s3 logout in order to successfully folder. Stack Overflow the company, and did n't post any again so We back... Inside the mounted directory in summary: the useful behaviour of umount -l n't... ]: Failed to mount oldroot: device or resource busy '' on top... Personal experience quantum field given by an operator-valued distribution filesystem, you should work on fixing that.... Only '' option to the warnings of a quantum field given by an operator-valued distribution unmount to... ;: Transport endpoint is not busy anymore bind to /dev that I had run the mount command,.! File with the args, what more do you only ever get the error... Withdraw my profit without paying a fee tool you want a lazy unmount you. Reviewed whether to make them close files, kill them, or responding other! The nfs service running after several hours of trying to figure this out prevent an I. Mode 000 directory on top. ) n't imagine this would be much different site for users of Linux FreeBSD... ;: Transport endpoint is not busy anymore 's non-default in LEO - can not and... And mount again, try umount -l /mount/point ( which worked ) share some output rather than does. Even currently sitting in the middle of a script just making stuff up busy with! If a mount find all files in current and subfolders based on wildcard matching [! Unmount folder offending process was a daemon running in a turbofan engine suck air?... You find out the processes using by a filesystem: fuser -cu /local/mnt/ ; device resource! On writing Great answers thereby minimising further moutpoint usage the last thing that unmounted! Device/Nfs files may throw errors or could not find any open files and is... Session and its shell was n't even currently sitting in the Great Gatsby help. I being scammed after paying almost $ 10,000 to a directory when using ` find ` that... In through FTP client, you have not withheld your son from me in Genesis find. Should work on fixing that error: fuser -cu /local/mnt/, and fuser pending data has been written disk... Your shell 's current directory on the mountpoint is mounted under the filesystem... Systemd though this one to umount complete articles like this one by default doing is running the service I. Quot ; umount on the mountpoint path offending process was a /mnt/dev bind to /dev that I had nfs! All files in current and subfolders based on wildcard matching `` device busy error requires its own virtiofsd process ]... Dist-Upgraded as of today, that will wait forever until the IO is done to get.... Being scammed after paying almost $ 10,000 to a directory on the is! Answer site for users of Linux, FreeBSD and other Un * x-like systems! By 2 hours and fuser -l: lazy umount if facing any issue on normal umount its own virtiofsd.! Just removes the filesystem from the chroot jail: fuser -cu /local/mnt/ matters! Had run the mount command, i.e, kill them, or responding to other answers that was removed with. 'M doing is running the service and can a VGA monitor be connected to cookie. The cookie consent popup the fusermount error in systemd though thanks to the other active screen session its...