Why do we kill some animals but not others? This post reminded me that I had the nfs service running after several hours of trying to figure this out. I will try the MNT_DETACH though. So I guess I mounted it twice in the end to the same location? unix.stackexchange.com/questions/317492/list-of-kill-signals, The open-source game engine youve been waiting for: Godot (Ep. The only time I get this is when I run this with no mount running. 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. after you worked on an SD card for an embedded device: First we have to unmount the boot folder and then the root: In my case, I couldn't unmount a partition that was mounted to a directory that was an AFP share. That's why it show device is busy or filesystem is in use. Any ideas as to what might be causing this error and how one might fix it? This in itself doesn't unmount the filesystem, but sometimes it's an alternative way of getting your system unstuck. Basically, if the mountpoint is mounted under the / filesystem, you'd want to avoid this. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? --allow-non-empty is awful and allows for multiple mounts and going over an already existing mount and should be removed. we need to check is any process holding or using the filesystem. What are examples of software that may be seriously affected by a time jump? It could be a file opened for reading or writing, a current directory, or a few more obscure cases. It's already documented on the rclone mount page: https://rclone.org/commands/rclone_mount/. It should get the job done. cvml 2018-07-05 11:02:37 7517 2. This doesn't work in my situation, there simply is no .xyz file. --fast-list does nothing on a mount can can be removed.'. Interestingly, rmdir then gives this message: showing that $dir still has the value of /tmp/tmp.xxxxxxxxxx. Why does fusermount prepend /home to the path when the resource is busy? Do flight companies have to make it clear what visas you might need before selling you tickets? To learn more, see our tips on writing great answers. Why not use use fuser earlier? Instead of using lsof to crawl through the file system, just use the total list of open files and grep it. See here and here for other causes and their remedies. sudo 36302 root cwd DIR 8,21 4096 1048577 /media It doesn't actually unmount the device, it just removes the filesystem from the namespace. best answer, thanks. Once you know which processes have files open, you can exit those apps, or kill them with the kill(1) command. Your systemd file is also not quite right. This appears to have started happening in v1.48 or possibly one before that. Try using lsof to find who use it. Apparently, this is the Correct Version that has solved this Problem: Thanks for contributing an answer to Super User! However fuser is useful when it comes to killing the processes causing your dramas so you can get on with your life. What output? it's the same as before. 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. How does a fan in a turbofan engine suck air in? Firdaus Ahmad June 20, 2020 Problem Solving 1 Comment. 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. How can I recognize one? cat rclone.servce and share output run below command to find out the processes using by a filesystem: fuser -cu /local/mnt/. This same behaviour can be achieved by mounting an empty directory with permissions 000 over the directory to be unmounted. . 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. The best answers are voted up and rise to the top, Not the answer you're looking for? lsof /path, lsof +f -- /path, and fuser /path all return nothing. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Already on GitHub? 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. -m : Name specifies a file on a mounted file system or a block device that is mounted. The "restic" mount apparently failed to un-mount automatically. 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. Asking for help, clarification, or responding to other answers. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Why was the nose gear of Concorde located so far aft? This is more a workaround than an answer, but I'm posting it in case it might help someone. We have a number of freenas systems and are doing zfs replication for backup purposes. UNIX is a registered trademark of The Open Group. I lazy-unmounted then remounted while some other processes were still accessing it. Stopping DBFS failed as shown: They keep reporting this error to me and I've been busting my ass trying to solve it. lsof could not find any open files but, Yep, worked for me, too. These options do have value, this isn't just for 1 personal system. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Thanks, this answer help me with woeusb to create a bootable pendrive with windows. Uhm, wasn't that the idea of the OP? I only have access to CentOS servers at the moment. . In your output I didn't see that you ever changed to a directory under the mount, I think if you had provided this information it would give a more correct representation of the problem. W/Vold: 1. 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 . 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. 1 : 2020.02.29, ( ) . It only takes a minute to sign up. Once you know which processes have files open, you can exit those . 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. A code search did not find that string. Although they're useful, I'm currently interested in just ASimpleMethodThatWorks). Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, Delete a file in Linux irrespective of it being open, can't write to /sys/devices/system/cpu/cpufreq/*/energy_performance_preference when ac-adapter is connected. Thanks though! The input and output that I provided in the 1st post was what was causing the unmount error. (Only for Not sure what that did. Error: Unable to find a match: htop Linux 2.1.116 added the umount2() system call, which, like umount(), @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. I'm curious, would you mind opening a pull request for that change? All pending data has been written to disk. What is the best way to deprotonate a methyl group? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Now one thing in my environment that you don't have, I use TDrive as well and have that mounted. https://rclone.org/flags/ Connect and share knowledge within a single location that is structured and easy to search. 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: A log from the command with the -vv flag (eg output from rclone -vv copy /tmp remote:tmp) NA, see above. 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). Why do we kill some animals but not others? ): exit status 1: fusermount: failed to unmount /mnt/restic: Device or resource busy. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 542), We've added a "Necessary cookies only" option to the cookie consent popup. Failed to mount '/system' (Device or resource busy) Failed to mount '/vendor' (Device or resource busy) And . "/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. I was really confused for ages because I couldn't get rid of it -- I kept getting "Device or resource busy"! Seems to be working fine in the output you shared. I hope @ncw will have some thoughts. Thank you for your reply. Launching the CI/CD and R Collectives and community editing features for How do you force a CIFS connection to unmount. 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. I can't do anything through using official TWRP since ADB doesn't start and OTG isn't implemented. 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. It has that in there. that's the systemd file with the args, what more do you need? No output. 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 Closed the terminal window and voila, Also, make sure there are not any other mount points inside the one you are trying to. systemctl status rclone.service and share the output Same deal with the "fuser" commands. if I take out -z, I get device busy error. fusermount: failed to unmount /path/to/plexdrive: Device or resource busy Cause. I understand the pain of trying to support and help someone. Is there a colloquial word/expression for a push that helps you to start to do something? This typically happens in directories where I am installing or compiling software libraries. I rebooted the machine, logged in as my normal user. Thanks for this advice. Exiting the terminal or changing directories to a local share then running fusermount -u solves my problems. ): %v. Side note: I get it. Of course lsof, fuser, exportfs and others show nothing. Showed me the process and the PID (column two). I connected to the other active screen session and its shell wasn't even currently sitting in the mounted directory. unable to umount (maybe already umounted? Before unmounted the filesysem. Browse other questions tagged. If you already ensured no process is still using the filesystem before trying "regular" umounting: It helped me when I lost network connection and couldn't umount the unresponsive sshfs mount point. Weapon damage assessment, or What hell have I unleashed? that's providing the fileystem. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? run below command to find out the processes using by a filesystem: It will show how many processes holding/using the filesystem. Ignoring the possibility of destroying data - is it possible to unmount a device that is currently being read? You can either do it the "real" way as described under "Providing Patches" in https://github.com/restic/restic/blob/master/CONTRIBUTING.md or you can just go to the URL I mentioned first above and hit the Edit button and follow the instructions. I just had this problem and could not kill -9 the process reading from the mounted filesystem. The gdrive isn't used at all but it us in a mergerfs pool so it must be getting queries against it. I had forgotten to unmount a dual partitioned thumb drive with a mountpoint on /dev/hda1 first. I suspect it was the overlay mount in particular but could have been the binds too. The best answers are voted up and rise to the top, Not the answer you're looking for? So it seems like this happens when the mount is in use when running fusermount -uz, Eventually I hit the error again and this time I know the mount was being using. [] [1684]: Unmounting '/var'. Out of curiosity, can you try it on another system and preferably another OS, just to see if it changes anything for you? 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. In Windows, I would have used LockHunter to resolve this. 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. 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. There is a way to detach a busy device immediately - even if it is busy and cannot be unmounted forcefully. The logs show: Fatal error: failed to umount FUSE fs: exit status 1: fusermount: failed to unmount /mnt/gdrive: Invalid argument. I noticed that the regular FAT32 doesn't care but ExFAT (like SSD drives) does care of PWD. Thank you for sticking with this. The mounts have disappeared from the mtab and now the OS refuses to unmount them. Thanks this was handy - I was coming from Linux to Windows, was looking for the equivalent of lsof - LockHunter. NFS mounts.) Browse other questions tagged. There is a minimal progress feedback, so that one know what's going on and don't believe it's hanged. Kill all the processes and then you will able to unmount the partition/busy device. (You'll need to run umount on the mountpoint twice if you've bind mounted a mode 000 directory on top.). rm: cannot remove .nfs00000024d296fc2f00086d4d: The best answers are voted up and rise to the top, Not the answer you're looking for? I wouldn't think so, as this should be an error from fusermount, not rclone. lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs Programs accessing target DEVICE/NFS files may throw errors OR could not work properly after force unmount. 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. Is quantile regression a maximum likelihood method? Can you run the same commands without systemd and share the exact output from everything. Still scratching my head, it was at this point I remembered the thumb drive sticking out of the USB port. MNT_DETACH (since Linux 2.4.11) Perform a lazy unmount: Why Device or resource busy whent to remove the file? fusermount: failed to unmount : Device or resource busy. at least right now, the ps grep is clean. When running umount /path I get: umount: /path: device is busy. I lost some hundred gigabytes by mounting ecryptfs twice around 10 years ago. Why did the Soviets not shoot down US spy satellites during the Cold War? How is "He who Remains" different from "Kang the Conqueror"? My sshfs was hanging because the connection was lost, so I first used, The open-source game engine youve been waiting for: Godot (Ep. 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. sshfs fusermount -u /mount/point fusermount: failed to unmount /mount/point: Device or resource busy, fusermount -zu /mount/point; sudo umount -l /mount/point; sshfs device is busy 542), We've added a "Necessary cookies only" option to the cookie consent popup. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. is not currently in use, then an initial call to umount2() with this If you run fusermount with the lazy option, it'll wait till all the IO finishes up before the daemon actually exits out. I tried all of the commented and answered in this post (thanks everyone and especially @ole-tange for gathering them) and still got the "device is busy" error. rev2023.3.1.43266. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? grep 36303 myusername cwd DIR 8,21 4096 1048577 /media By accident I found out how to get rid of a ramdisk. 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. The best answers are voted up and rise to the top, Not the answer you're looking for? It worked! I kept restarting the service. Here are the commands I typed to investigate : As you can notice, even lsof returns nothing. You may need to repeat this a few times. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Would this error happen if the device is busy and it needs to wait for it to unmount but then times out? After umounting it, my pb. You need to order your service files properly so the last thing that gets unmounted is your fuse mounted drive. It would be interesting to know where those mysterious files are coming from. rev2023.3.1.43266. Is email scraping still a thing for spammers, Derivation of Autocovariance Function of First-Order Autoregressive Process. Could very old employee stock options still be accessible and viable? Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. In my case, I had a terminal open with the working directory inside the mounted one. @psusi, that is incorrect. (Please give as answer a simple "unlock this" method, and not complete articles like this one. When you edit something, no notification happens. 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. Jordan's line about intimate parties in The Great Gatsby? How do I profile C++ code running on Linux? That's why it show device is busy or filesystem is in use. sdb1sdf1sdi1 3 Sign in If automount is configured you must stop the automount service for this mount. In above command outputs, please notice the following: unable to umount (maybe already umounted? These commands can disrupt a running process, cause data loss OR corrupt open files. How do I delete an exported environment variable? I had this issue, and it turned out that there were active screen sessions in the background I didn't know about. I had to unmount it the same number of times that I had run the mount command, i.e. That's the same behavior I'm seeing. I'll get back to you with more log output. 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 To investigate, run lsof +f -- example. If 3 checks fail, it will disconnect and umount. It's available but not every command works with every backend. I have an s3fs-fuse "device" mounted at /mnt/s3. UNIX is a registered trademark of The Open Group. Well occasionally send you account related emails. This changed in version 2.34. So here is another option, more verbose, but safer: tries to unmount until it successes, as many time as needed, in a loop. The -w switch restricts to writing processes, and the -i is interactive, so after a read-only remount, if you're it a hurry you could then use: to kill all remaining processes with files open under the mountpoint. I often see "device busy" with sshfs when I have a terminal window open to a directory on the sshfs share. Thanks for the tip! Another alternative when anything works is editing /etc/fstab, adding noauto flag and rebooting the machine. 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. It's not fast-list as it does nothing on a mount. In the meantime, this is how you can try and reproduce. Remounting as read-only and then retrying the unmount helped. Do you think it may be the fast-list argument? Yeah, you can't unmount something not mounted as it should error out. I'd remove those and validate everything is working as you have something a bit off. How does a fan in a turbofan engine suck air in? To add to BruceCran's comment above, the cause for my manifestation of this problem just now was a stale loopback mount. 12G/data1 Worked. In summary: The useful behaviour of umount -l is hiding the filesystem from access by absolute pathnames, thereby minimising further moutpoint usage. 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. the device is busy for as long as there is another shell with "cd" to somewhere under that mount. 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. OPTIONS. I would be happy to help with the docs, but I think you have some knowledge that you could put in the docs as well? MNT_EXPIRE (since Linux 2.6.8) Mark the mount point as expired. The nfs-kernel-server probably goes behind the normal open files and thus is not listed by lsof and fuser. 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. lsof and fuser didn't give me anything either. Your answer helped me sort out a similarly exported NFS share. Click to enlarge. Before unmounted the filesysem. :-). Running the fuser command immediately disconnected me from the VPS. 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". The number of distinct words in a sentence. [*] All kadaitcha men are liars. 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. An umount command is used to unmount a device/partition by specifying the path to the directory where it has been mounted. So maybe it's not handling a lazy unmount properly when it's busy. Could very old employee stock options still be accessible and viable? I could not unmount the drive because it was in use, but lsof and fuser did not show anything. It would generate an error if not mounted. That's not helpful. I experience this frequently on servers that have NFS network file systems. Try the following, but before running it note that the -k flag will kill any running processes keeping the device busy. I mean, it worked in you tests as expected as that was the idea. already one commenter on the accepted answer seems to have done that. "unable to umount (maybe already umounted? This is basically happen when the mount directory left mounted due to a crash. Have a question about this project? we need to check is any process holding or using the filesystem. Was Galileo expecting to see so many stars? You were able to reproduce it! It appears that I'm stuck with not being able to umount while its busy. How can I update NodeJS and NPM to their latest versions? fusermount: failed to unmount : Device or resource busy, MMSIM15.10.284_Hotfix.7zcadenceMMSIM15110. The tool you want is lsof, which stands for list open files. Then any new accesses to filenames in the below the mountpoint will hit the newly overlaid directory with zero permissions - new blockers to the unmount are thereby prevented. (sharing into an Apple bonjour/avahi mdns world) 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 TDrive service is identical, no config or services difference so I'm convinced it's because of usage difference. see this https: . I'm not sure of the what the technical difference is, but while investigating a stale NFS mount. Learn more about Stack Overflow the company, and our products. 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. 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. A second umount2() call specifying MNT_EXPIRE unmounts Are you only seeing the error in systemd? I'm being careful not to unmount it twice bc I know that will cause it. an archive file from a file manager GUI. Make sure that you aren't still in the mounted device when you are trying to umount. #rm: cannot remove 2021-09-23/.nfs0000000680da307e0000074e: How does a fan in a turbofan engine suck air in? When attempts to unmount failed, I researched the error. 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 find this returns must faster, although it's less accurate. Share some output rather than it doesn't work. How to draw a truncated hexagonal tiling? 10. Bacon saved. @animosity22 vfs-cache-max-size off Gave warnings that lstat cannot execute and that the information may be incomplete, and didn't list the culprit. lsof 36305 root cwd DIR 8,21 4096 1048577 /media. It only takes a minute to sign up. restarting several times no error reported. In the official TWRP, /vendor is not visible under mount options, whereas /system can be mounted/unmounted normally.
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