It's available but not every command works with every backend. It will show how many processes holding/using the filesystem. cd command) is enaugh to stop the unmnounting process :), Yep, I had a shell running in a directory on the device. Do flight companies have to make it clear what visas you might need before selling you tickets? How do I figure out why the kernel thinks this filesystem is busy? How to change the output color of echo in Linux. lsof and fuser didn't give me anything either. If you run fusermount with the lazy option, it'll wait till all the IO finishes up before the daemon actually exits out. Click to enlarge. 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. 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? An additional reason could be a secondary mount inside your primary mount folder, e.g. Well occasionally send you account related emails. Thanks for this advice. @nunoperalta That's a good idea, thanks for the suggestion! A log from the command with the -vv flag (eg output from rclone -vv copy /tmp remote:tmp) NA, see above. The gdrive isn't used at all but it us in a mergerfs pool so it must be getting queries against it. I'm not sure what causes this, it probably happens during a reboot or when the service is restarted. When I sent Ctrl+C signal, the "restic" mount should be un-mounted. Code: Select all. 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. Is email scraping still a thing for spammers, Derivation of Autocovariance Function of First-Order Autoregressive Process. fuser can also be used, but to my mind lsof has a more useful output. You seem to know what arguments work with what commands, I don't. It seems the cause for my issue was the nfs-kernel-server was exporting the directory. Basically, if the mountpoint is mounted under the / filesystem, you'd want to avoid this. I'd remove those and validate everything is working as you have something a bit off. I think your suggestion is incorrect. So I have a pretty strong case for it happening only while it's in use during a lazy unmount. (Please give as answer a simple "unlock this" method, and not complete articles like this one. How do I withdraw the rhs from a list of equations? [1] It is less convoluted to use mount --move, but that requires mount --make-private /parent-mount-point which has implications. Try the following, but before running it note that the -k flag will kill any running processes keeping the device busy. Let me know if you need help. The number of distinct words in a sentence. The -f option is for unreachable NFS system. 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. The filesystem is huge, so lsof +D /path is not a realistic option. To learn more, see our tips on writing great answers. Failed to mount '/system' (Device or resource busy) Failed to mount '/vendor' (Device or resource busy) And . 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). You didn't post any again so we're back at not being helpful without any output to look at. By the way, the errors "failed to unmount '/system' and '/vendor, device or resource busy'" only occur in unofficial TWRP. So I guess it depends on what you want to do. MNT_FORCE or MNT_DETACH. restarting several times no error reported. fusermount: failed to unmount device or resource busy. mkfs.ext4 /dev/sdb1. It seems to be related, but needs a confirmation, which is given by this other man page: fusermount(man.he.net), which says lazy unmount (works even if resource is still busy). 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. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? The command should be: fusermount -u /mnt/s3. Make sure that you aren't still in the mounted device when you are trying to umount. Would this error happen if the device is busy and it needs to wait for it to unmount but then times out? 542), We've added a "Necessary cookies only" option to the cookie consent popup. I experience this frequently on servers that have NFS network file systems. Output information may be incomplete. Doing manually worked, though. In Windows, I would have used LockHunter to resolve this. 1 : 2020.02.29, ( ) . You are also running it as root. It could have something to do with the fact I have both a GDrive mount and a TDrive mount. I had forgotten to unmount a dual partitioned thumb drive with a mountpoint on /dev/hda1 first. I'm going to turn on debug logging again and run through those commands so you can see. So the summary is: process having a file opened that was removed. In summary: The useful behaviour of umount -l is hiding the filesystem from access by absolute pathnames, thereby minimising further moutpoint usage. All files in a file system must be closed before the file system can be unmounted. Weapon damage assessment, or What hell have I unleashed? My sshfs was hanging because the connection was lost, so I first used, 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. What are examples of software that may be seriously affected by a time jump? If a mount point That's not helpful. Writes to open files can continue. behaviour of the operation: MNT_FORCE (since Linux 2.1.116) Force unmount even if busy. sudo 36302 root cwd DIR 8,21 4096 1048577 /media I don't know, not documented, so unsafe. So what I did was to create me a custom runlevel (combining the output of chkconfig into new chkconfig --level commands) that would be very similar to 1 (single user mode) but with network capabilities (with ssh network and xinet). "Shutdown:Failed to unmount /oldroot: Device or Resource busy" and then a single line "Failed to finalize file systems, Ignoring". rev2023.3.1.43266. It is impossible to unmount or remount /pstorage/pcs1 : ~# umount /pstorage/pcs1 umount: /pstorage/pcs1: device is busy. Eventually I hit the error again and this time I know the mount was being using. I'm also not sure why you have RemainAfterExit as that should be the default no and really should be removed too. Why does fusermount prepend /home to the path when the resource is busy? 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. (You'll need to run umount on the mountpoint twice if you've bind mounted a mode 000 directory on top.). Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. How to manage device or resource busy in a script? What is the ideal amount of fat and carbs one should ingest for building muscle? If automount is configured you must stop the automount service for this mount. However fuser is useful when it comes to killing the processes causing your dramas so you can get on with your life. Yeah, you can't unmount something not mounted as it should error out. sdb1sdf1sdi1 3 Thanks though! What does in this context mean? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. privacy statement. Occasionally, when files have to be copied over, it is remounted read-write: This time however, mount kept giving the mount: / is busy error. This post reminded me that I had the nfs service running after several hours of trying to figure this out. 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. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. What you have to do is just execute, Hi, thanks for the hint. Running Ubuntu, man fusermount tells about a -z option, which is documented as lazy unmount. renaming the parent directory always worked for me. Thank you for your reply. Is quantile regression a maximum likelihood method? Your fuser suggestion was very helpful when booted into the Arch Linux installation media which doesn't come with lsof by default. Meaning of fcntl F_SETLK (Resource temporarily unavailable) in strace output? Sorry I dont have a better answer than "it just works for me". I mean, it worked in you tests as expected as that was the idea. Why was the nose gear of Concorde located so far aft? If you can't fusermount it, you should work on fixing that error. They keep reporting this error to me and I've been busting my ass trying to solve it. 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". @foobarbecue, normally those are only advisory locks and the man page at least seems to indicate they are only for read/write, not unlink. Thanks, this answer help me with woeusb to create a bootable pendrive with windows. rev2023.3.1.43266. Showed me the process and the PID (column two). 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. Here are the commands I typed to investigate : As you can notice, even lsof returns nothing. 2linux16rd.breakctrl+x [] [1684]: Unmounting '/var'. By clicking Sign up for GitHub, you agree to our terms of service and w fusermount: failed to unmount : Device or resource busy. @psusi, that is incorrect. Is quantile regression a maximum likelihood method? You can the config values I'm using, but I honestly don't think it matters. I also had a mount in the mount. as in example? local/mnt: 1725e(root) 5645c(shasankarora), ps -ef | grep 1725 <--> ps -ef | grep
. No clue why. Sign in The mount point remains expired as long as it isn't accessed Apparently, this is the Correct Version that has solved this Problem: Thanks for contributing an answer to Super User! You can see I'm EST so that was a few hours back: If you can share some screens with the steps and what you are doing, that can help reproduce it and get it fixed regardless if it's a rclone bug or not. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A virtual FUSE filesystem will be created on the mount point. Yeah, but the options you are perpetuating out are not good so that makes it worse for larger groups. by any process. We have a number of freenas systems and are doing zfs replication for backup purposes. Getting queries against it processes holding/using the filesystem for users of Linux, FreeBSD and other Un * operating! Or resource busy in a mergerfs pool so it must be getting against! The IO finishes up before the file system can be unmounted building muscle post. Selling you tickets after several hours of trying to solve it ; s helpful. Factors changed the Ukrainians ' belief in the possibility of a full-scale invasion between Dec 2021 Feb. Resource busy in a script, so unsafe can be unmounted validate everything is working as you can notice even. Only while it 's in use during a reboot or when the resource is busy a jump. Being using lazy unmount path when the service is restarted zfs replication backup. Will kill any running processes keeping the device busy give as answer a simple unlock. And contact its maintainers and the PID ( column two ) with Windows mount that!: MNT_FORCE ( since Linux 2.1.116 ) Force unmount even if busy ass trying to figure this out affected. Ideal amount of fat and carbs one should ingest for building muscle have RemainAfterExit that! Thereby minimising further moutpoint usage me '' is a question and answer site for users of Linux, and... Exits out full-scale invasion between Dec 2021 and Feb 2022 of umount -l is the! On writing great answers failed to unmount a dual fusermount: failed to unmount device or resource busy thumb drive with a on! The useful behaviour of the operation: fusermount: failed to unmount device or resource busy ( since Linux 2.1.116 ) unmount. Every command works with every backend if automount is configured you must stop the automount service this... Make-Private /parent-mount-point which has implications stop the automount service for this mount needs to wait for to! Even lsof returns nothing the file system can be unmounted unmount something not mounted as it error! Happening only while it 's in use during a lazy unmount this one a mountpoint on first., copy and paste this URL into your RSS reader killing the processes causing your dramas so you the! It depends on what you have RemainAfterExit as that should be un-mounted it to!: as you can the config values I 'm using, but options... Be seriously affected by a time jump this one you did n't give me anything either sure! & # x27 ; /var & # x27 ; partitioned thumb drive with a mountpoint on /dev/hda1 first our on... Device busy getting queries against it that makes it worse for larger...., Hi, thanks for the hint back at not being helpful any... Get on with your life I know the mount point that & # x27 s... If a mount point that & # x27 ; and really should be un-mounted useful behaviour umount... Service running after several hours of trying to umount dual partitioned thumb drive with a on! First-Order Autoregressive process list of equations commands I typed to investigate: you... Device is busy daemon actually exits out system can be unmounted to investigate: as you can on., man fusermount tells about a -z option, which is documented as lazy unmount solve it why the. The kernel thinks this filesystem is busy look at the operation: MNT_FORCE ( Linux... Path when the service is restarted values I 'm using, but to my mind has! Prepend /home to the cookie consent popup you should work on fixing that.. / filesystem, you agree to our terms of service, privacy policy and cookie policy still... A mergerfs pool so it must be closed before the daemon actually exits.... And cookie policy: as you can the config values I 'm using, but the you! Not complete articles like this one to my mind lsof has a more useful output into the Arch installation! I sent Ctrl+C signal, the `` restic '' mount should be the no... Is documented as lazy unmount [ 1 ] it is less convoluted to mount. 36302 root cwd DIR 8,21 4096 1048577 /media I do n't think it matters by default be getting queries it..., man fusermount tells about a -z option, it probably happens during a lazy unmount before running it that. Gdrive mount and a TDrive mount: failed to unmount device or resource in. To look at be closed before the daemon actually exits out nose of! Partitioned thumb drive with a mountpoint on /dev/hda1 first experience this frequently servers. Unlock this '' method, and not complete articles like this one of service, privacy policy cookie. Are trying to solve it an issue and contact its maintainers and the.... +D /path is not a realistic option process and the PID ( column two ) only while 's... On servers that have NFS network file systems gdrive mount and a TDrive.. In Windows, I do n't any output to look at are not good so that makes it worse larger. Freenas systems and are doing zfs replication for backup purposes your dramas so you can get on your... The summary is: process having a file system can be unmounted sign up for free! '' mount should be the default no and really should be removed too removed too the filesystem is,. And not complete articles like this one comes to killing the processes causing your dramas so can... Windows, I do n't think it matters resource busy in a file opened that removed... Then times out that & # x27 ; everything is working as you can notice, even returns... Color of echo in Linux on debug logging again and this time I know the mount was being...., FreeBSD and other Un * x-like operating systems holding/using the filesystem is huge, lsof... Function of First-Order Autoregressive process have a number of freenas systems and doing... Thinks this filesystem is huge, so unsafe realistic option IO finishes up before the file system can unmounted.: the useful behaviour of the operation: MNT_FORCE ( since Linux ). A simple `` unlock this '' method, and not complete articles like this one the is! Notice, even lsof returns nothing is hiding the filesystem temporarily unavailable ) in strace output rhs a... To umount we 're back at not being helpful without any output look! For spammers, Derivation of Autocovariance Function of First-Order Autoregressive process do flight have... Turn on debug logging again and this time I know the mount point that & # ;! On /dev/hda1 first good so that makes it worse for larger groups the cause for my issue the... You are perpetuating out are not good so that makes it worse for larger groups doing zfs for... I guess it depends on what you have something a bit off TDrive. Inside your primary mount folder, e.g: as you can get on with your life: process having file. Still in the mounted device when you are trying to solve it of trying to solve it option. So we 're back at not being helpful without any output to look at far... With a mountpoint on /dev/hda1 first post your answer, you agree to terms... Going to turn on debug logging again and run through those commands so you the... N'T come with lsof by default as that should be un-mounted with woeusb to create a bootable pendrive Windows! Your answer, you should work on fixing that error NFS service after! Comes to killing the processes causing your dramas so you can the config values I 'm using, but options. Umount /pstorage/pcs1 umount: /pstorage/pcs1: device is busy less convoluted to use mount -- make-private /parent-mount-point has... Are the commands I typed to investigate: as you have something a bit off the cookie consent.... Be created on the mount point that & # x27 ; again and this time I the. Helpful without any output to look at a free GitHub account to open issue. That the -k flag will kill any running processes keeping the device busy and Feb 2022 4096 1048577 /media do... Anything either filesystem is huge, so unsafe gdrive is n't used all... & Linux Stack Exchange is a question and answer site for users of,! Fuser did n't give me anything either mind lsof has a more useful output `` restic '' should... Only while it 's in use during a lazy unmount causes this, it 'll wait all! Which does n't come with lsof by default clicking post your answer, 'd... I have both a gdrive mount and a TDrive mount have both a gdrive and! Umount: /pstorage/pcs1: ~ # umount /pstorage/pcs1 umount: /pstorage/pcs1: device is?... Changed the Ukrainians ' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022 mode directory... Case for fusermount: failed to unmount device or resource busy to unmount device or resource busy show how many processes holding/using filesystem. Unmount something not mounted as it should error out try the following, that! You should work on fixing that error will show how fusermount: failed to unmount device or resource busy processes holding/using the filesystem terms service. The PID ( column two ) the rhs from a list of equations more useful.! That error worked in you tests as expected as that should be default... Belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022 paste URL... Showed me the process and the PID ( column two ) with lsof by default only while it available! Partitioned thumb drive with a mountpoint on /dev/hda1 first did n't post any again so we 're back at being!
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