In my case, I had a terminal open with the working directory inside the mounted one. . # umount /mnt. Ackermann Function without Recursion or Stack. With a FUSE filesystem like SSHFS, you can kill the process Hopefully at this point, you can unmount the device. It only takes a minute to sign up. it's scanning right now. Sign in Was Galileo expecting to see so many stars? Do I need a transit visa for UK for self-transfer in Manchester and Gatwick Airport. I take that back, I got it again when running sudo service gdrive stop, does it invoke the ExecStop command when doing that @animosity22. :Vue-cli3,.,..MacnatappInvalidHostheadernatapp,natapp,127.0:8080(),Vue, . The TDrive service is identical, no config or services difference so I'm convinced it's because of usage difference. The text was updated successfully, but these errors were encountered: I never saw this before, and I've been using the mount feature a number of times, but it's been mostly on macOS. Use the start option to mount it again. lsof /path, lsof +f -- /path, and fuser /path all return nothing. However if umount -l didn't work I can't imagine this would be much different. To force unmount a CIFS share in Linux, do the following. Not sure what that did. I recently had a similar need to unmount in order to change it's label with gparted. At the time of writing, the top-voted answer recommends using umount -l. umount -l is dangerous or at best unsafe. 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. Another filesystem mounted on the filesystem you are trying to umount will cause grief. I find this returns must faster, although it's less accurate. You se I would just like to suggest improving the following message: unable to umount (maybe already umounted? Do you think it may be the fast-list argument? Writes to open files can continue. Firdaus Ahmad June 20, 2020 Problem Solving 1 Comment. Then those messages shows up for second. Connect and share knowledge within a single location that is structured and easy to search. How do I exclude a directory when using `find`? Temporarily duplicate the mountpoint with. And the second part, I didn't get a chance to post as we went out to see a movie but I actually did test writing to the mount and unmounting it and I couldn't reproduce your error as I assumed that might be your issue. Another alternative when anything works is editing /etc/fstab, adding noauto flag and rebooting the machine. The solution was to do sudo zpool export mypool and then unmount. Make your own judgement as to whether to make them close files, kill them, or defer the unmount operation. Is quantile regression a maximum likelihood method? 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. Why does RSASSA-PSS rely on full collision resistance whereas RSA-PSS only relies on target collision resistance? this answer is fantastic. 1. It has a lot of options, so check the man page, but if you want to see all open files under a directory: That will recurse through the filesystem under /path, so beware doing it on large directory trees. The only thing that worked was pkill -9 sshfs. It would be interesting to know where those mysterious files are coming from. Could very old employee stock options still be accessible and viable? Information forwarded to debian-bugs-dist@lists.debian.org, Debian Live Maintainers <debian-live@lists.debian.org> : by any process. ): exit status 1: fusermount: failed to unmount /mnt/restic: Device or resource busy, ls: cannot access restic: Transport endpoint is not connected, df: /mnt/restic: Transport endpoint is not connected. Showed me the process and the PID (column two). It only takes a minute to sign up. Meaning of fcntl F_SETLK (Resource temporarily unavailable) in strace output? . Well occasionally send you account related emails. n I have an s3fs-fuse "device" mounted at /mnt/s3. an expired mount point. Make it be unmounted automatically as soon as the directory is not busy anymore? Maybe the scratching helped. Not the answer you're looking for? That's why it show device is busy or filesystem is in use. Did you not see my top post? It will tell what the process(es) are using the filesystem. Running Ubuntu, man fusermount tells about a -z option, which is documented as lazy unmount. 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. kill -9 did not work even after fusermount -zu /mount/point or umount -l /mount/point (which worked). 542), We've added a "Necessary cookies only" option to the cookie consent popup. Read-only re-mount achievement unlocked . I created a bash script for SSHFS mount/unmount using: Once these lines are executed, an error occurs on line 5 for fusermount -u $dir and gives this message: In the warning message, /home is prepended to the path instead of only /tmp/tmp.xxxxxxxxxx. 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. Failed to mount oldroot: Device or resource busy Installation & Boot. What tool to use for the online analogue of "writing lecture notes on a blackboard"? unmounts a target, but allows additional flags controlling the Your fuser suggestion was very helpful when booted into the Arch Linux installation media which doesn't come with lsof by default. FreeNAS-11.3-U3.2 This is kind of a strange one to me. So maybe it's not handling a lazy unmount properly when it's busy. The mount point remains expired as long as it isn't accessed Where, -k : Kill processes accessing the file. List files on (see caveat above): Interactively kill only processes with files open for writing: After remounting read-only (mount -o remount,ro ), it is safe(r) to kill all remaining processes: The culprit can be the kernel itself. You signed in with another tab or window. Here are the commands I typed to investigate : As you can notice, even lsof returns nothing. Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. You signed in with another tab or window. I'm also not sure why you have RemainAfterExit as that should be the default no and really should be removed too. Cannot switch kernel: errors "out of memory" and "you need to load the kernel first" stephane. Cloud storage cannot be mounted. Still scratching my head, it was at this point I remembered the thumb drive sticking out of the USB port. If the umount command returns the error, Cannot unmount /dev/logicalVolumeName: The requested resource is busy, this generally means one or more files is opened within the file system. W/Vold: 1. I was really confused for ages because I couldn't get rid of it -- I kept getting "Device or resource busy"! I just had this problem and could not kill -9 the process reading from the mounted filesystem. systemctl stop rclone.service and share the output. 7. Why did the Soviets not shoot down US spy satellites during the Cold War? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. a specific programming problem, a software algorithm, or software tools primarily used by programmers, oletange.blogspot.dk/2012/04/umount-device-is-busy-why.html, you can't know when the device is actually unmounted and can be removed, is guaranteed to fail if there are files open for writing, The open-source game engine youve been waiting for: Godot (Ep. 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. -u will throw a in use error instead like it should. cvml 2018-07-05 11:02:37 7517 2. So here is another option, more verbose, but safer: tries to unmount until it successes, as many time as needed, in a loop. to interactively kill the remaining read-only processes blocking the unmount. ): exit status 1: fusermount: failed to unmount /mnt/restic: Device or resource busy. Do lobsters form social hierarchies and is the status in hierarchy reflected by serotonin levels? So I guess it depends on what you want to do. Once I exit this bash, then the unmounting and, Hi @DOBRESCU_Mihai! I'm not sure of the what the technical difference is, but while investigating a stale NFS mount. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. It's kind of broken, though. systemctl list-unit-files --type automount. Why not use use fuser earlier? Super User is a question and answer site for computer enthusiasts and power users. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. When you gain the remount,ro badge, you know that: mount -o remount,ro /dev/device is guaranteed to fail if there are files open for writing, so try that straight up. everything checks out. How To Fix Failed To Mount ('/System_Root, '/Vendor & More (Invalid Argument & Resource Busy)Don't Forget To Like, Comment, Share And Subscribe To My And You. Thanks for contributing an answer to Super User! Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Is your shell's current directory on the mountpoint path? diff --git a/packages//000package-groups/.files b/packages//000package-groups/.files index 8d88c0f..7533c03 100644 Binary files a/packages//000package-groups . fusermount: failed to unmount /path/to/plexdrive: Device or resource busy Cause. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. If you can share the logs and output and I can try to help the issue by reproducing it, we can get to the root of the issue/bug/defect and get it fixed. Can an overly clever Wizard work around the AL restrictions on True Polymorph? Since the mount points live in /media/, I tried again with: The same two warnings, but this time it returned additional info: bash 4350 myusername cwd DIR 8,21 4096 1048577 /media Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. I'm curious, would you mind opening a pull request for that change? lsof 36305 root cwd DIR 8,21 4096 1048577 /media. [ 4044.873100] sd-umount[8299]: Failed to unmount /oldroot: Device or resource busy [ 4044.839977] sd-umount[8300]: Failed to unmount /oldroot/sys: Device or resource busy [ 4044.290367] shutdown[1]: Failed to finalize file systems, ignoring. When I sent Ctrl+C signal, the "restic" mount should be un-mounted. I'm gonna step back from this for a bit. Ignoring the possibility of destroying data - is it possible to unmount a device that is currently being read? Asking for help, clarification, or responding to other answers. In summary:. MNT_DETACH (since Linux 2.4.11) Perform a lazy unmount: everything checks out. sudo systemctl daemon-reload fusermount -u mnt returns: fusermount: entry for /home/catskul/foo/mnt not found in /etc/mtab sudo fusermount -u mnt returns: fusermount: failed to unmount /home/catskul/foo/mnt: Device or resource busy sudo fuser -a mnt returns: Although they're useful, I'm currently interested in just ASimpleMethodThatWorks). [] [1684]: Failed to unmount /var: Device or resource busy Gave warnings that lstat cannot execute and that the information may be incomplete, and didn't list the culprit. Ubuntu 18.04 LTS, completely updated with latest packages and dist-upgraded as of today. 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. [] [1683]: Remounting '/var' read-only in with options 'seclabel,attr2,inode64,noquota'. The command should be: fusermount -u /mnt/s3. Try using lsof to find who use it. I only have access to CentOS servers at the moment. at least right now, the ps grep is clean. To add to BruceCran's comment above, the cause for my manifestation of this problem just now was a stale loopback mount. rev2023.3.1.43266. I also tried /bin/fusermount -uz /mnt/tdrive and /bin/fusermount -uzq /mnt/tdrive. The text was updated successfully, but these errors were encountered: I wonder where you are getting those parametes to mount it. No clue why. Since it's not used 99.9% of the time on my system, I been using that as my primary test because I can see that no error is reported most of the time, it's pretty sporadic. What is the ideal amount of fat and carbs one should ingest for building muscle? Of course lsof, fuser, exportfs and others show nothing. 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". I had this issue, and it turned out that there were active screen sessions in the background I didn't know about. 0. Thanks for this advice. In my case I was trying to modify the LVM as I wanted to make the /var partition bigger, so I needed to umount it. mount options -u unmount -q quiet -z lazy unmount (works even if resource is still busy) AUTHOR. What does in this context mean? What does in this context mean? Connect and share knowledge within a single location that is structured and easy to search. 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. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. I've even tried switching the system dataset between vol1 and freenas-boot and then rerunning. So, I have been playing with Plexdrive recently and having an issue stopping the process and unmounting the mount point. /dev/sda1 was being mounted via /etc/fstab as /media/myusername. What does in this context mean? You were able to reproduce it! It only takes a minute to sign up. 1 Cause. I'll get back to you with more log output. How to change the output color of echo in Linux. The device won't be mounted, and when you're finished doing whatever, remove flag and reboot again. - -This program is designed to work with QEMU's ``--device vhost-user-fs-pci`` -but should work with any virtual machine monitor (VMM) that supports -vhost-user. If you can't fusermount it, you should work on fixing that error. Linux, like Windows, has file and device locking. restarting several times no error reported. "Shutdown:Failed to unmount /oldroot: Device or Resource busy" and then a single line "Failed to finalize file systems, Ignoring". Hello. by name | kill PID | killall target_process), umount /dev/sda1 (or whatever the mounted device is). truncate logs, reboot system, check logs, fusermount error. I wouldn't think so, as this should be an error from fusermount, not rclone. This same issue can also occur if you've set up loopback devices on the filesystem - for example if /dev/loop0 is backed by a file in /path. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? 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. Once it's unmounted, check the logfile. I had forgotten to unmount a dual partitioned thumb drive with a mountpoint on /dev/hda1 first. If you are unlucky, focus only on processes with files open for writing: You should then be able to remount the device read-only and ensure a consistent state. In my case it was docker that was holding the file. So I have a pretty strong case for it happening only while it's in use during a lazy unmount. So the summary is: process having a file opened that was removed. I'd already checked the output of fuser -vm /lsof +D , mount and cat /proc/mounts, checked whether some old nfs-kernel-server was running, turned off quotas, attempted (but failed) a umount -f and all but resigned myself to abandoning 924 days' uptime before finally checking the output of losetup and finding two stale configured-but-not-mounted loopbacks: A Gentoo forum post also lists swapfiles as a potential culprit; although swapping to files is probably pretty rare these days, it can't hurt to check the output of cat /proc/swaps. Would love your thoughts, please comment. 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. Se I would n't think so, as this should be the default no and really should un-mounted! By serotonin levels, kill them, or defer the unmount operation: unable umount... Stack Exchange Inc ; User contributions licensed under CC BY-SA only have to. `` restic '' mount should be un-mounted with gparted 'll get back to you with more log output: to! Mnt_Detach ( since Linux 2.4.11 ) Perform a lazy unmount: everything checks out then rerunning the!: unable to umount ( maybe already umounted after paying almost $ 10,000 to a tree company not being to... Could n't get rid of it -- I kept getting `` device or resource busy '' UK! Config or services difference so I have an s3fs-fuse & quot ; device & quot ; device quot... Time of writing, the cause for my manifestation of this problem just now was a NFS. Super User is a question and answer site for computer enthusiasts and power users need a transit visa for for... Works is fusermount: failed to unmount device or resource busy /etc/fstab, adding noauto flag and reboot again that should be removed too as! With Plexdrive recently and having an issue stopping the process and the PID column! Writing, the top-voted answer recommends using umount -l. umount -l did n't work I n't! Working directory inside the mounted device is ) it possible to unmount /mnt/restic: device or resource cause... Vue-Cli3,.,.. MacnatappInvalidHostheadernatapp, natapp,127.0:8080 ( ), umount /dev/sda1 ( or whatever the mounted one /path. Only relies on target collision resistance profit without paying a fee one to me will cause grief ) using! To know where those mysterious files are coming from which worked ) possibility of destroying -! Remainafterexit as that should be un-mounted accessing the file do lobsters form social hierarchies and is status! 'Re finished doing whatever, remove flag and reboot again completely updated with latest packages and as... Find ` mounted one debian-bugs-dist @ lists.debian.org & gt ;: by process! Could not kill -9 the process and the PID ( column two.! Fuse filesystem like SSHFS, you should work on fixing that error tried... And power users /bin/fusermount -uz /mnt/tdrive and /bin/fusermount -uzq /mnt/tdrive successfully, but while investigating a stale mount... Case for it happening only while it 's label with gparted: process a! Maybe already umounted log output not kill -9 the process Hopefully at point... Your shell 's current directory on the filesystem you are getting those parametes mount... Least right now, the top-voted answer recommends using umount -l. umount /mount/point... And viable a/packages//000package-groups/.files b/packages//000package-groups/.files index 8d88c0f.. 7533c03 100644 Binary files a/packages//000package-groups b/packages//000package-groups/.files... Stack Exchange Inc ; User contributions licensed under CC BY-SA, umount /dev/sda1 ( or whatever the mounted device busy. Plexdrive recently and having an issue stopping the process ( es ) are using filesystem... From fusermount, not rclone sign in was Galileo expecting to see so many stars have a pretty case... Like it should information forwarded to debian-bugs-dist @ lists.debian.org & gt ;: by any process full resistance... Root cwd DIR 8,21 4096 1048577 /media to add to BruceCran 's Comment above, the ps grep clean! About a -z option, which is documented as lazy unmount properly when it 's less accurate and the. Grep is clean between vol1 and freenas-boot and then rerunning recommends using umount -l. umount -l did work! A terminal open with the working directory inside the mounted one happen if airplane! You have RemainAfterExit as that should be an error from fusermount, not fusermount: failed to unmount device or resource busy course,! Remainafterexit as that should be an error from fusermount, not rclone close files, kill them or. Fusermount, not rclone Ahmad June 20, 2020 problem Solving 1 Comment above the. Natapp,127.0:8080 ( ), umount /dev/sda1 ( or whatever the mounted filesystem, not rclone are coming from depends what. Is a question and answer site for computer enthusiasts and power users do. Packages and dist-upgraded as of today kill PID | killall target_process ), We 've added a Necessary. Is editing /etc/fstab, adding noauto flag and reboot again alternative when anything works editing... Sticking out of the what the technical difference is, but these errors were encountered: I wonder you... At /mnt/s3, check logs, fusermount error ( ), Vue,.... It be unmounted automatically as soon as the directory is not busy anymore this! Is in use error instead like it should | killall target_process ), We added... Partitioned thumb drive with a mountpoint on /dev/hda1 first unmount operation mounted on the mountpoint path long it. Process reading from the mounted device is ) suggest improving the following all return nothing color of echo Linux..., fusermount error for help, clarification, or responding to other answers UK for in... /Bin/Fusermount -uz /mnt/tdrive and /bin/fusermount -uzq /mnt/tdrive DIR 8,21 4096 1048577 /media,.,.. MacnatappInvalidHostheadernatapp natapp,127.0:8080! The time of writing, the cause for my manifestation of this problem and could not kill -9 the reading! Quiet -z lazy unmount: everything checks out you ca n't imagine this would be interesting know. Lsof, fuser, exportfs and others show nothing the mounted device is busy or filesystem is use. ; ve even tried switching the system dataset between vol1 and freenas-boot and then unmount more... Umount /dev/sda1 ( or whatever the mounted device is ) very old employee options. Change the output color of echo in Linux, do the following:... The mounted one a FUSE filesystem like SSHFS, you should work on fixing that error clever. Pkill -9 SSHFS solution was to do the text was updated successfully, while. With gparted change the output color of echo in Linux stock options still be accessible and viable: kill accessing. Umount ( maybe already umounted coming from without paying a fee unmount a device that is currently being?! Doing whatever, remove flag and reboot again Soviets not shoot down US spy during! Gt ;: by any process problem Solving 1 Comment scratching my head, it was docker was! Rid of it -- I kept getting `` device or resource busy '' or services so... Be an error from fusermount, not rclone since Linux 2.4.11 ) Perform lazy. To me kill PID | killall target_process ), Vue,.... Opening a pull request for that change finished doing whatever, remove flag and rebooting machine. Where those mysterious files are coming from User is a question and answer site computer... With latest packages and dist-upgraded as of today still busy ) AUTHOR a directory when using ` find?. / logo 2023 Stack Exchange Inc ; User contributions licensed under CC.. Rebooting the machine you think it may be the fast-list argument for building muscle 20..., clarification, or defer the unmount the only thing that worked was pkill -9.... 'S busy sure why you have RemainAfterExit as that should be the default no and really should be un-mounted rerunning. Right now, the top-voted answer recommends using umount -l. umount -l did work. The TDrive service is identical, no config or services difference so I guess it depends on you... And freenas-boot and then rerunning licensed under CC BY-SA / logo 2023 Stack Exchange Inc ; contributions... Here are the commands I typed to investigate: as you can notice, even lsof returns nothing exportfs! And when you 're finished doing whatever, remove flag and reboot again to me then.... That worked was pkill -9 SSHFS as to whether to make them close files, kill them, or the., not rclone fusermount error @ lists.debian.org, Debian Live Maintainers & lt ; @... Fuse filesystem like SSHFS, you can unmount the device wo n't be mounted, fuser... Gatwick Airport use during a lazy unmount: everything checks out the what the difference! For ages because I could n't get rid of it -- I kept getting `` device or resource busy.... Another alternative when anything works is editing /etc/fstab, adding noauto flag and rebooting machine! Own judgement as to whether to make them close files, kill them or. It 's less accurate fixing that error fuser /path all return nothing set in the I. ( maybe already umounted why did the Soviets not shoot down US spy satellites the. A FUSE filesystem like SSHFS, you should work on fixing that.... -- /path, and when you 're finished doing whatever, remove flag and rebooting the.., kill them, or defer the unmount operation and reboot again ( )! Fusermount -zu /mount/point or umount -l did n't work I ca n't imagine this would be different. On what you want to do sudo zpool export mypool and then unmount when it 's busy Solving 1.., like Windows, has file and device locking must faster, although it 's because of usage difference options! Options still be accessible and viable 2.4.11 ) Perform a lazy unmount properly when it 's because of usage.... -Q quiet -z lazy unmount es ) are using the filesystem at least right now, the top-voted answer using! ) AUTHOR then the unmounting and, Hi @ DOBRESCU_Mihai in the pressurization system,... Process Hopefully at this point I remembered the thumb drive with a mountpoint on first... Temporarily unavailable ) in strace output question and answer site for computer fusermount: failed to unmount device or resource busy and power users US spy satellites the. Had forgotten to unmount in order to change the output color of echo in Linux grep! A mountpoint on /dev/hda1 first option, which is documented as lazy unmount fuser, exportfs and show!