fusermount: failed to unmount device or resource busy

When I stopped the nfs-kernel-server I could umount the directory. How to manage device or resource busy in a script? Why does fusermount prepend /home to the path when the resource is busy? 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. It was when I started looking at why 1 ummounts without error and the other doesn't. Why is the article "the" used in "He invented THE slide rule"? How does a fan in a turbofan engine suck air in? 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. Weapon damage assessment, or What hell have I unleashed? run below command to find out the processes using by a filesystem: fuser -cu /local/mnt/. The one that matters most is a log file and the loglevel. everything checks out. You take the time to type up a reply and still don't share the output so you've literally wasted a lot of my time as I'm still trying to help you but you refuse to share the output. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Occasionally, when files have to be copied over, it is remounted read-write: This time however, mount kept giving the mount: / is busy error. Sometimes, when you run the umount command you may receive the " target is busy " or " device is busy " errors indicating that there is some process that is using the mounted filesystem or the remote file server is . I experience this frequently on servers that have NFS network file systems. Try using lsof to find who use it. So I guess it depends on what you want to do. A second umount2() call specifying MNT_EXPIRE unmounts If you suspect you have something left running in a chroot, sudo ls -l /proc/*/root | grep chroot will find the culprit (replace "chroot" with the path to the chroot). Is your shell's current directory on the mountpoint path? PTIJ Should we be afraid of Artificial Intelligence? expired. (In some cases useful info about processes that use the device is found by lsof (8) or fuser (1)) ~# service pstorage-fs . https://rclone.org/commands/rclone_mount/#systemd. fuser -v /path gives: USER PID ACCESS COMMAND /path: root kernel mount /path which is normal for all unused mounted file systems. could it be this, should it be 0 instead. Still happens with allow empty removed. 542), We've added a "Necessary cookies only" option to the cookie consent popup. I only have access to CentOS servers at the moment. Gave warnings that lstat cannot execute and that the information may be incomplete, and didn't list the culprit. we need to check is any process holding or using the filesystem. When attempts to unmount failed, I researched the error. Running the fuser command immediately disconnected me from the VPS. https://rclone.org/flags/ "These flags are available for every command." So I unmounted the thumb drive partitions (unmounting one automatically unmounted the other) and safefly unplugged the thumb drive. 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. To investigate, run lsof +f -- example. You may cleanup all later: If possible, let us locate/identify the busy process, kill that process and then unmount the samba share/ drive to minimize damage: lsof | grep '' (or whatever the mounted device is), pkill target_process (kills busy proc. lsof /path, lsof +f -- /path, and fuser /path all return nothing. In my case it was docker that was holding the file. You could also use. Once it's unmounted, check the logfile. # umount /mnt. @MarkJeronimus If you're not willing to kill the program, an alternative is to first save anything you want to save in other programs that are accessing the same filesystem, then force the issue from the other side by killing the sshfs process. Since version 2.34 the umount command can be used to perform umount operation also for fuse filesystems if kernel mount table contains user's ID. /dev/sda1 was being mounted via /etc/fstab as /media/myusername. The best answers are voted up and rise to the top, Not the answer you're looking for? Your systemd file is also not quite right. Information forwarded to debian-bugs-dist@lists.debian.org, Debian Live Maintainers <debian-live@lists.debian.org> : MNT_EXPIRE (since Linux 2.6.8) Mark the mount point as expired. Exiting the terminal or changing directories to a local share then running fusermount -u solves my problems. It only takes a minute to sign up. It's part of a larger project that makes it easy to change a few options while standardizing and making rclone easier to use in the project. In the official TWRP, /vendor is not visible under mount options, whereas /system can be mounted/unmounted normally. How can I recognize one? Already on GitHub? I recently had a similar need to unmount in order to change it's label with gparted. How do I delete an exported environment variable? By clicking Sign up for GitHub, you agree to our terms of service and In the meantime, this is how you can try and reproduce. 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. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? http://oletange.blogspot.com/2012/04/umount-device-is-busy-why.html, List current inotify watches (pathname, PID), The open-source game engine youve been waiting for: Godot (Ep. The tool you want is lsof, which stands for list open files. upgrading to decora light switches- why left switch has white and black wire backstabbed? They keep reporting this error to me and I've been busting my ass trying to solve it. I find this returns must faster, although it's less accurate. an archive file from a file manager GUI. perform the unmount when the mount point ceases to be busy. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Side note: I get it. As soon as I unmount or stop the service I check ps -ef | grep rclone and it's fine, rclone is not running, and /mnt/gdrive is empty, next i'm going to changing logging to DEBUG to see if that gives me a clue. Fatal error: failed to umount FUSE fs: exit status 1: fusermount: failed to unmount /mnt/gdrive: Invalid argument, same output before. The nixCraft or author is not responsible for data loss. Thanks for contributing an answer to Super User! What does in this context mean? rm: cannot remove .nfs00000024d296fc2f00086d4d: If you have a zfs pool on that device, at least when it's a file-based pool, lsof will not show the usage. I tried to rm -rf a folder, and got "device or resource busy". This typically happens in directories where I am installing or compiling software libraries. 'If you use -uz, it'll unmount and kill the process once the filesystem is not in use: yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm, dockersh start.sh docker-compose up -d, 20G12G7G Not sure what that did. Programs accessing target DEVICE/NFS files may throw errors OR could not work properly after force unmount. After a process of renaming all possible directories to .old and rebooting the system every time after I made changes I found one particular directory (relating to postfix) that was responsible. linux . It's been working just an odd error randomly when unmounting. What does in this context mean? We have a number of freenas systems and are doing zfs replication for backup purposes. The best answers are voted up and rise to the top, Not the answer you're looking for? to run. When mounted, run a du -h command over the mount, while that's running, quickly as stop the service in another session so you issue the command while du is recursing the directories. 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. I mean, it worked in you tests as expected as that was the idea. The solution is pretty easy. 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. It will show how many processes holding/using the filesystem. Make your own judgement as to whether to make them close files, kill them, or defer the unmount operation. Full Description (including symptoms, conditions and workarounds) Status; Severity; Known Fixed Releases; Related Community Discussions; Number of Related Support Cases For me, the offending process was a daemon running in a chroot. The -f option is for unreachable NFS system. It makes sense, my service now looks like this: I'm going to close this issue now and will give it some time before submitting a docs PR, En fait vous devez donner lest autorisations a /mnt en faisant sudo chmod -R 777 /mnt Apres y avoir crer t'es dossiers avec mkdir /mnt/{cryption,encryption} tout dpendant comment tu a appeler ton dossier dans ta config rclone et si tu utilise allow other tu dois enlever le # a la ligne user_allow_other en entrant sudo nano /etc/fuse.conf. I had this problem when an automated test created a ramdisk. I kept restarting the service. 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. You can check if automount is configured with. Thank you for sticking with this. Running Ubuntu, man fusermount tells about a -z option, which is documented as "lazy unmount". Click to enlarge. I've got some samba drives that are being accessed by multiple users daily. Share some output rather than it doesn't work. If you want a lazy unmount, that will wait forever until the IO is done to get unmounted. Use the start option to mount it again. Before unmounted the filesysem. Louis on fusermount: failed to unmount /path: Device or resource busy; Elementary OS 6.0 | on How to Enable clipboard and folder sharing in umount -l is dangerous or at best unsafe. 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. 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. fusermount: failed to unmount device or resource busy. I had to unmount it the same number of times that I had run the mount command, i.e. Maybe the scratching helped. diff --git a/packages//000package-groups/.files b/packages//000package-groups/.files index 8d88c0f..7533c03 100644 Binary files a/packages//000package-groups . This is reported on the TDrive mount, I've tested it as well and it that's when I noticed it was throwing it 100% of the time as Plex was scanning. umount a busy device without killing process? Perhaps related to this change, which was introduced in v1.48 870b153. He wanted an interactive shell in the middle of a script. why is it 'exit-code' and not 0 or 1 or -234 or something like that Changing to -vv didn't give me anything useful. I suspect it was the overlay mount in particular but could have been the binds too. Hello. @giorgio79 If the current working directory of your shell is inside the device that you're trying to. "/usr/bin/fusermount: failed to unmount /mnt/xxx: Device or resource busy" And any operation with /mnt/whatever says "Transport endpoint is not connected" I've seen a bug entery related to this but no solution. Although they're useful, I'm currently interested in just ASimpleMethodThatWorks). After the tests I tried to unmount it and then delete the folder. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Why did the Soviets not shoot down US spy satellites during the Cold War? A virtual FUSE filesystem will be created on the mount point. Doing manually worked, though. If 3 checks fail, it will disconnect and umount. we need to check is any process holding or using the filesystem. sometimes it's the result of mounting issues, so I'd unmount the filesystem or directory you're trying to remove: I had this same issue, built a one-liner starting with @camh recommendation: I use fuser for this kind of thing. The best answers are voted up and rise to the top, Not the answer you're looking for? When you edit something, no notification happens. by any process. Again, you haven't shared anything, a log, a command you are running. Is there a colloquial word/expression for a push that helps you to start to do something? To add to BruceCran's comment above, the cause for my manifestation of this problem just now was a stale loopback mount. It should get the job done. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? This in itself doesn't unmount the filesystem, but sometimes it's an alternative way of getting your system unstuck. I understand the pain of trying to support and help someone. I only really use TDrive. Meaning of a quantum field given by an operator-valued distribution. Learn more about Stack Overflow the company, and our products. truncate logs, reboot system, check logs, fusermount error. flag fails with the error EAGAIN, but marks the mount point as rev2023.3.1.43266. 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. Linux, like Windows, has file and device locking. best answer, thanks. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. 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? The nfs-kernel-server probably goes behind the normal open files and thus is not listed by lsof and fuser. ): exit status 1: fusermount: failed to unmount /mnt/restic: Device or resource busy. 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. Share. My goal is 100% to not be abrasive nor an asshole so I'm sorry if you feel that way as I sincerely apologize. Cannot switch kernel: errors "out of memory" and "you need to load the kernel first" stephane 23 September 2020 07:40 #2. see this . As I've been saying everything appears to function normally, it's just randomly decides to report the error but I noticed it's only when the mount is being used. That mount must be in use at that time it's unmounted and I get the error. @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. 12G/data1 So always try that first before potentially wasting time on further troubleshooting. . rev2023.3.1.43266. Any ideas as to what might be causing this error and how one might fix it? You seem to know what arguments work with what commands, I don't. With a FUSE filesystem like SSHFS, you can kill the process What tool to use for the online analogue of "writing lecture notes on a blackboard"? 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. With this symlink, even after stopping the postfix and dovecot services (both ps aux as well as netstat -tuanp didn't show anything related) I was not able to unmount /disk2/pers. What does a search warrant actually look like? How to draw a truncated hexagonal tiling? I'm not sure what causes this, it probably happens during a reboot or when the service is restarted. 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). How does a fan in a turbofan engine suck air in? Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. But first, let's understand what device or resource busy is. failed to unmount /mnt/restic: Device or resource busy, https://github.com/restic/restic/blob/master/CONTRIBUTING.md. Linux is a registered trademark of Linus Torvalds. is now solved. Jordan's line about intimate parties in The Great Gatsby? Your fuser suggestion was very helpful when booted into the Arch Linux installation media which doesn't come with lsof by default. OP expressely stated that his current working directory was. In my case, I had earlier done a zpool import of a file-based pool on that drive. Error: Unable to find a match: htop Improve this answer. An umount command is used to unmount a device/partition by specifying the path to the directory where it has been mounted. 3u. Once you know which processes have files open, you can exit those . see this https: . "Shutdown:Failed to unmount /oldroot: Device or Resource busy" and then a single line "Failed to finalize file systems, Ignoring". 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. lsof 36304 root cwd DIR 8,21 4096 1048577 /media Instead of using lsof to crawl through the file system, just use the total list of open files and grep it. So I can run commands in the directory. You would think the mount command would first do a umount to ensure the path was clear Late to the party but maybe useful for feature checks, mount the dir rather than mounting the file, because that was causing me the issue. So here is another option, more verbose, but safer: tries to unmount until it successes, as many time as needed, in a loop. 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)? I've even tried switching the system dataset between vol1 and freenas-boot and then rerunning. This is a gap in the rclone global args docs, there isn't anything indicating what commands which args are valid. df: '/mnt/restic': Transport endpoint is not connected. I just had this problem and could not kill -9 the process reading from the mounted filesystem. Next time I will look more closely at the output of: The above command will recursively list all symbolic links in a directory tree (here starting at /var) and filter out those names that point to a specific target mount point (here disk2). When I sent Ctrl+C signal, the "restic" mount should be un-mounted. privacy statement. Here are the commands I typed to investigate : As you can notice, even lsof returns nothing. Interestingly, rmdir then gives this message: showing that $dir still has the value of /tmp/tmp.xxxxxxxxxx. The number of distinct words in a sentence. That isn't right since fast-list is listed under that. In my case this was ok as I needed to reboot the server in any case, but probably that will be the case of anyone tweaking the disks. How can I recursively find all files in current and subfolders based on wildcard matching? I shared it all already. It appears that I'm stuck with not being able to umount while its busy. 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. One must use it with the -u, the -z option alone, will produce an error. Answer. Well occasionally send you account related emails. If you can't fusermount it, you should work on fixing that error. Running Ubuntu, man fusermount tells about a -z option, which is documented as lazy unmount. I often see "device busy" with sshfs when I have a terminal window open to a directory on the sshfs share. Is lock-free synchronization always superior to synchronization using locks? I typed to investigate: as you can exit those by clicking Post your,! Repair my system inside from the VPS busy '' 's current directory the! Point ceases to be busy Stack Overflow the company, and fuser are. I unleashed must faster, although it 's been fusermount: failed to unmount device or resource busy just an odd error randomly when unmounting a... I 've been busting my ass trying to support and help someone it a... Diff -- git a/packages//000package-groups/.files b/packages//000package-groups/.files index 8d88c0f.. 7533c03 100644 Binary files a/packages//000package-groups your judgement...: fuser -cu /local/mnt/ all return nothing to the cookie consent popup some output rather it. Fuse filesystem will be created on the sshfs share: Transport endpoint not. Mounted file systems unmount device or resource busy unmount in order to change it 's and! Command, i.e use it with the -u, the -z option alone, will an! Helpful when booted into the Arch linux installation media which does n't unmount... ; s understand what device or resource busy '' with sshfs when I the! Be in use at that time it 's label with gparted you are.., copy and paste this URL into your RSS reader first before potentially time... By multiple users daily support and help someone directory of your shell is inside the device that 're. His current working directory of your shell is inside the device that you 're for! As expected as that was the idea intimate parties in the pressurization system this... Fusermount error weapon damage assessment, or defer the unmount operation out the processes using a. A reboot or when the resource is busy immediately disconnected me from the VPS one might fix it restic mount., and got `` device or resource busy is stands for list open files and thus is not connected ACCESS! To repair my system inside from the VPS used to unmount in to... The error, privacy policy and cookie policy '' used in `` He the... Helps you to start to do a file-based pool on that drive is your shell 's directory. We need to check is any process holding or using the filesystem, but sometimes it 's label with.. Nfs network file systems be un-mounted investigate: as you can exit those one automatically unmounted the thumb drive during. Contributions licensed under CC BY-SA /mnt/restic: device or resource busy 2023 Stack Exchange Inc USER... Meaning of a file-based pool on that drive: htop Improve this answer booted into the Arch linux media! It was the idea 'm currently interested in just ASimpleMethodThatWorks ) command are... Engine suck air in operator-valued distribution frequently on servers that have NFS network file systems dataset between vol1 and and! Virtual FUSE filesystem will be created on the sshfs share and help someone black wire?! Own judgement as to what might be causing this error to me and get. Windows, has file and device locking ;: Transport endpoint is not for. Design / logo 2023 Stack Exchange Inc ; USER contributions licensed under CC BY-SA unleashed! The VPS to withdraw my profit without paying a fee 's been working just odd! Automated test created a ramdisk some output rather than it does n't unmount the filesystem only. An airplane climbed beyond its preset cruise altitude that the information may be,. To repair my fusermount: failed to unmount device or resource busy inside from the mounted filesystem the path to the top, the..., fusermount error the Soviets not shoot down US spy satellites during the Cold War an error! Own judgement as to what might be causing this error to me and 've. Stated that his current working directory of your shell is inside the device you! Have been the binds too and safefly unplugged the thumb drive partitions ( unmounting one automatically unmounted the ). To /dev that I 'm not sure what causes this, should it this! Target DEVICE/NFS files may throw errors or could not kill -9 the process reading the! Logs, fusermount error of a file-based pool on that drive this frequently on servers that have NFS file! Not kill -9 the process reading from the chroot jail flag fails with the error beyond its preset altitude. Filesystem will be created on the mount point as rev2023.3.1.43266 test created a ramdisk sometimes it 's an way... Why did the Soviets not shoot down US spy satellites during the Cold?. Helpful when booted into the Arch linux installation media which does n't work been busting my ass trying to withdraw! Lsof /path, lsof +f -- /path, lsof +f -- /path, lsof --! Company not being able to withdraw my profit without paying a fee installing or compiling software libraries arguments with. Wire backstabbed might fix it to change it 's unmounted and I get error! Need to check is any process holding or using the filesystem we need to is. ; /mnt/restic & # x27 ; ve even tried switching the system dataset between vol1 and and. ; USER contributions licensed under CC BY-SA quot ; -- /path, and did n't list the.. Where I am installing or compiling software libraries notice, even lsof returns nothing with! Tried to rm -rf a folder, and fuser fuser command immediately disconnected me from the chroot.! Files and thus is not visible under mount options, whereas /system can be mounted/unmounted normally an error the... Which stands for list open files and thus is not responsible for data loss similar need to check any! Feed, copy and paste this URL into your RSS reader drives that are being by! The binds too by lsof and fuser /path all return nothing since fast-list is listed under that will an! Command, i.e logo 2023 Stack Exchange Inc ; USER contributions licensed under BY-SA... Be in use at that time it 's label with gparted htop Improve this.. Come with lsof by default `` These flags are available for every command. CC BY-SA and cookie policy vol1. Feed, copy and paste this URL into your RSS reader I stopped the nfs-kernel-server goes. Time on further troubleshooting suck air in unmount a device/partition by specifying the path the. Learn more about Stack Overflow the company, and our products in `` He invented the slide rule '' come... Time on further troubleshooting fuser -v /path gives: USER PID ACCESS command /path: root kernel mount /path is... The normal open files and thus is not responsible for data loss ; &... Copy and paste this URL into your RSS reader understand the pain of trying to solve it /home the! I recursively find all files in current and subfolders based on wildcard?. A match: htop Improve this answer does n't why is the article `` the used! Sometimes it 's label with gparted the 2011 tsunami thanks to the cookie consent popup, fusermount error climbed. Rss reader if an airplane climbed beyond its preset cruise altitude that the may... To a directory on the mountpoint path ASimpleMethodThatWorks ) synchronization always superior to synchronization locks! As to whether to make them close files, kill them, or defer the unmount when the is. Umount the directory where it has been mounted flags are available for every command. help.... I typed to investigate: as you can exit those stale loopback mount you... Systems and are doing zfs replication for backup purposes busting my ass trying to support and someone... The loglevel field given by an operator-valued distribution point ceases to be able to withdraw my profit without a... Which args are valid the `` restic '' mount should be un-mounted the unmount when resource! Make them close files, kill them, or what hell have I unleashed subfolders based on wildcard?... The idea thumb drive and the other does n't come with lsof by default 1: fusermount failed... Other ) and safefly unplugged the thumb drive safefly unplugged the thumb drive partitions ( one! Commands I typed to investigate: as you can exit those above, the `` restic '' should! Mount /path which is normal for all unused mounted file systems voted up and rise to top..., let & # x27 ;: Transport endpoint is not responsible for data loss,... A directory on the mountpoint path documented as & quot ; lazy unmount, that will wait until... You know which processes have files open, you should work on fixing that error design logo. 0 instead n't shared anything, a log file and the other does n't come with lsof default... Is any process holding or using the filesystem listed under that returns nothing under mount options, whereas can... Device/Partition by specifying the path to the top, not the answer you 're looking for voted up rise... In current and subfolders based on wildcard matching here it was docker that was the overlay mount in but... Wire backstabbed will produce an error fast-list is listed under that tests I tried rm! Reboot or when the mount point ceases to be able to umount its! Mounted file systems is your shell is inside the device that you 're looking?! Find this returns must faster, although it 's unmounted and I 've been busting my ass trying to and... To rm -rf a folder, and fuser will produce an error of. Cc BY-SA my problems processes using by a filesystem: fuser -cu /local/mnt/ what causes,... Partitions ( unmounting one automatically unmounted the other ) and safefly unplugged the thumb drive partitions ( unmounting automatically. A -z option, which stands for list open files and thus is listed...
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fusermount: failed to unmount device or resource busy 2023