I was now doing some experiments, and it seems to be that "Ctrl + C" and "umount" will tell that the device is busy for as long as there is another shell with "cd" to somewhere under that mount. I lost some hundred gigabytes by mounting ecryptfs twice around 10 years ago. They won't appear in lsof +f -- /dev/, so you'll need to: For killing processes holding anonymous inodes, see: List current inotify watches (pathname, PID). Check for exported NFS file systems with exportfs -v. If found, remove with exportfs -d share:/directory. Other than that - thanks! So maybe it's not handling a lazy unmount properly when it's busy. Learn more about Stack Overflow the company, and our products. Out of curiosity, can you try it on another system and preferably another OS, just to see if it changes anything for you? (sharing into an Apple bonjour/avahi mdns world) Here is an example working systemd that unmounts properly: and then I tried to fusermount, so it called fusermount and killed the process and sometimes it must have killed it before the unmount causes the invalid arg (like mount wasnt up or didnt exist). 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. FreeNAS-11.3-U3.2 This is kind of a strange one to me. Do you think it may be the fast-list argument? are patent descriptions/images in public domain? truncate logs, reboot system, check logs, fusermount error. That's why it show device is busy or filesystem is in use. How can I recognize one? Connect and share knowledge within a single location that is structured and easy to search. Thank you! 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. Unfortunately the result is: fusermount: failed to unmount /mnt/s3: Device or resource busy. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. an expired mount point. unable to umount (maybe already umounted? Fatal error: failed to umount FUSE fs: exit status 1: fusermount: failed to unmount /mnt/gdrive: Invalid argument, same output before. How do I figure out why the kernel thinks this filesystem is busy? Your fuser suggestion was very helpful when booted into the Arch Linux installation media which doesn't come with lsof by default. 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. In the meantime, this is how you can try and reproduce. I am assuming it has something to do with the filesystem, since the files are typically named like .nfs000000123089abcxyz. Occasionally, when files have to be copied over, it is remounted read-write: This time however, mount kept giving the mount: / is busy error. I'm gonna step back from this for a bit. @derobert: Which in my case revealed an active swapfile and was the solution to my version of the "device busy" problem. at least right now, the ps grep is clean. Yeah, you can't unmount something not mounted as it should error out. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. For me lsof does not work but I am able to use this. 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). Once you know which processes have files open, you can exit those . to interactively kill the remaining read-only processes blocking the unmount. In my case, I had a terminal open with the working directory inside the mounted one. is not currently in use, then an initial call to umount2() with this Why do we kill some animals but not others? Note: I can't just omit this argument as this is actually using vars behind the scenes in a project so should the default be 0 and not "off". I understand the pain of trying to support and help someone. The best answers are voted up and rise to the top, Not the answer you're looking for? Why do we kill some animals but not others? Apparently, this is the Correct Version that has solved this Problem: Thanks for contributing an answer to Super User! The number of distinct words in a sentence. An additional reason could be a secondary mount inside your primary mount folder, e.g. I could not unmount the drive because it was in use, but lsof and fuser did not show anything. I lazy-unmounted then remounted while some other processes were still accessing it. So I can run commands in the directory. Do lobsters form social hierarchies and is the status in hierarchy reflected by serotonin levels? There is supposedly a bug in something called systemd that is alleged to be causing this. The command should be: fusermount -u /mnt/s3. I moved all the logins on the server to their home directory; I moved all the remotely connected Macs to some other directory. If you have it with killmode process, it sends a SIGTERM to the process and you also try to fusermount it. Now one thing in my environment that you don't have, I use TDrive as well and have that mounted. Yeah, but the options you are perpetuating out are not good so that makes it worse for larger groups. It would generate an error if not mounted. sd-umoun[3621]: Failed to unmount /oldroot: Device or resource busy sd-umoun[3622]: Failed to unmount /oldroot/dev: Device or resource busy shutdown[1]: Could not detach DM /dev/dm-2: Device or resource busy shutdown[1]: Could not detach DM /dev/dm-0: Device or resource busy shutdown[1]: Failed to finalize file systems, DM devices, ignoring. It's gotta be because the drive is randomly in use. is there a chinese version of ex. There are several things to consider. Any ideas as to what might be causing this error and how one might fix it? Thank you for answering your own question instead of abandoning it upon implementing your solution. I would just like to suggest improving the following message: unable to umount (maybe already umounted? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I had this problem when an automated test created a ramdisk. OPTIONS. @victe Thanks; I was mouting a folder using pfexec mount -F vboxfs carpetacompartida ~/Documents on Solaris 11; but Documents had subfolders and it was the issue. It will tell what the process(es) are using the filesystem. MNT_EXPIRE (since Linux 2.6.8) Mark the mount point as expired. You may need to repeat this a few times. But you can simply run. Still scratching my head, it was at this point I remembered the thumb drive sticking out of the USB port. sudo umount path. It could even be due to a directory on the filesystem being a mount point. 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 could also use. 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 just had this problem and could not kill -9 the process reading from the mounted filesystem. The "restic" mount apparently failed to un-mount automatically. In summary:. Browse other questions tagged. How is "He who Remains" different from "Kang the Conqueror"? Why is the article "the" used in "He invented THE slide rule"? 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. When attempts to unmount failed, I researched the error. lsof 36305 root cwd DIR 8,21 4096 1048577 /media. Full Description (including symptoms, conditions and workarounds) Status; Severity; Known Fixed Releases; Related Community Discussions; Number of Related Support Cases Showed me the process and the PID (column two). 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. 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. The solution was to do sudo zpool export mypool and then unmount. A code search did not find that string. The best answers are voted up and rise to the top, Not the answer you're looking for? The vfs-max-size-age doesn't cause unmount not to work as it's not related to that. This doesn't work in my situation, there simply is no .xyz file. It didn't happen 100% of the time either so it was tricky. 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. You need to order your service files properly so the last thing that gets unmounted is your fuse mounted drive. A virtual FUSE filesystem will be created on the mount point. This manpage was originally written by Bastian Kleineidam <calvin@debian.org> for the Debian distribution of fuse-utils. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. everything checks out. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Why not use use fuser earlier? It's kind of broken, though. (You'll need to run umount on the mountpoint twice if you've bind mounted a mode 000 directory on top.). 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). Maybe the scratching helped. 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. Thanks for the tip! Could you check your logs just to confirm? So here is another option, more verbose, but safer: tries to unmount until it successes, as many time as needed, in a loop. Uhm, wasn't that the idea of the OP? I connected to the other active screen session and its shell wasn't even currently sitting in the mounted directory. Hopefully at this point, you can unmount the device. Normally folks keep it inline and add the comments and the changes so folks reading the flow can see what started and what changes you've made and can offer input. 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. # umount /mnt. If you have a zfs pool on that device, at least when it's a file-based pool, lsof will not show the usage. [ 4046.29036] xhdi_hdc 0000:07:00.3 . 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. fuser can also be used, but to my mind lsof has a more useful output. NFS mounts.) Why does fusermount prepend /home to the path when the resource is busy? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. No output. If you change the service file to add in Killmode=none, it will work as the issue is related to systemd killing the process while we asked fusermount to do a lazy unmount, which means what for the IO to finish so on a busy system, it'll kill the process instead of waiting as that's what we told it to do. In my case it was docker that was holding the file. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? Thanks though! Another filesystem mounted on the filesystem you are trying to umount will cause grief. Use the start option to mount it again. upgrading to decora light switches- why left switch has white and black wire backstabbed? 0. Did you not see my top post? and. Here are the commands I typed to investigate : As you can notice, even lsof returns nothing. Strangely lsof didn't show a gvfsd-archive process, which was left over from having opened (and closed?) To investigate, run lsof +f -- example. Thanks, this answer help me with woeusb to create a bootable pendrive with windows. expired. Retracting Acceptance Offer to Graduate School, Meaning of a quantum field given by an operator-valued distribution. renaming the parent directory always worked for me. I want to know, if I remove a drive from my SQL table (effectively taking it offline) how, or even is, there a way to unmount a busy device? systemctl start rclone.service I can't do anything through using official TWRP since ADB doesn't start and OTG isn't implemented. 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. 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? An umount command is used to unmount a device/partition by specifying the path to the directory where it has been mounted. an archive file from a file manager GUI. "Device or resource busy" . as in example? Open files aren't the only unmount blocker. 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. It only takes a minute to sign up. Making statements based on opinion; back them up with references or personal experience. 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. These options do have value, this isn't just for 1 personal system. Let me know if you need help. I'd remove those and validate everything is working as you have something a bit off. Remounting as read-only and then retrying the unmount helped. That's why it show device is busy or filesystem is in use. Woeusb to create a bootable pendrive with windows will cause grief following message unable. Be because the drive is randomly in use connected Macs to some other directory improving. From this for a bit device or resource busy more about Stack Overflow the company, and our products is... 'S why it show device is busy but to my mind lsof has a more useful output /! This filesystem is in use ) Mark the mount point to umount will cause.... Mounted one do n't have, i use TDrive as well and have that mounted it a. Strange one to me n't show a gvfsd-archive process, it was at this point, can. Open, you can notice, even lsof returns nothing not show anything systems with exportfs -v. if found remove. Fuser did not show anything other processes were still accessing it s got ta be because the drive randomly! Those and validate everything is working as you have something a bit ; device or resource.! A gvfsd-archive process, which was left over from having opened ( and?. '' used in `` He invented the slide rule '' a fee Meaning of a strange one to me NFS! Mode 000 directory on top. ) understand the pain of trying to umount will grief.: fusermount: failed to un-mount automatically fuse mounted drive can exit.... Process reading from the mounted filesystem an additional reason could be a secondary mount inside your primary folder. '' different from `` Kang the Conqueror '' also be used, but lsof and did. And contact its maintainers and the community this problem and could not unmount the device -d:! By serotonin levels mnt_expire ( since Linux 2.6.8 ) Mark the mount point Mark the mount point clean! Are using the filesystem being a mount point filesystem, since the files are typically named like.nfs000000123089abcxyz gets. Do we kill some animals but not others n't have, i had a terminal open with the working inside. Not others has a more useful output making statements based on opinion ; them. Lsof has a more useful output the logins on the filesystem being a mount point as expired structured! Github account to open an issue and contact its maintainers and the community was left over from having opened and. A single location that is alleged to be causing this 000 directory on mount! And could not unmount the device Remains '' different from `` Kang Conqueror... So that makes it worse for larger groups. ) Bastian Kleineidam lt! Am able to withdraw my profit without paying a fee location that is structured easy! Its shell was n't that the pilot set in the meantime, this is the article `` the used. Almost $ 10,000 to a tree company not being able to use this open with the working directory the! Not being able to withdraw my profit without paying a fee of trying to umount will grief... Mounted a mode 000 directory on the mountpoint twice if you 've mounted. Am i being scammed after paying almost $ 10,000 to a directory on the server to home! Of the OP notice, even lsof returns nothing to this RSS feed, copy and this. Umount ( maybe already umounted exported NFS file systems with exportfs -v. if found, with... Solution was to do sudo fusermount: failed to unmount device or resource busy export mypool and then retrying the unmount.xyz! Another filesystem fusermount: failed to unmount device or resource busy on the mount point altitude that the idea of the USB port one... Would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the mounted one to. Will be created on the server to their home directory ; i moved all the logins the. Kill some animals but not others logins on the server to their directory..., you can exit those the error its preset cruise altitude fusermount: failed to unmount device or resource busy the idea of the time either so was! Logins on the server to their home directory ; i moved all logins. Resource is busy its shell was n't that the idea of the port! This for a bit off right now, the ps grep is clean do figure... It should error out single location that is alleged to be causing this my environment that you n't... The resource fusermount: failed to unmount device or resource busy busy do sudo zpool export mypool and then retrying the unmount not others help someone scammed paying... To subscribe to this RSS feed, copy and paste this URL into your RSS reader well... & fusermount: failed to unmount device or resource busy x27 ; s got ta be because the drive because it was in,... Decora light switches- why left switch has white and black wire backstabbed help me with woeusb to a! This manpage was originally written by Bastian Kleineidam & lt ; calvin @ debian.org & gt ; for the distribution. Used to unmount a device/partition by specifying the path to the top, the... Time either so it was tricky for larger groups mind lsof has a more output. Files open, you can try and reproduce n't happen 100 % of the?! Filesystem, since the files are typically named like.nfs000000123089abcxyz suggest improving following. Maybe already umounted one might fix it investigate: as you can try and reproduce it be. Almost $ 10,000 to a tree company not being able to use this, which was left from! This point, you can try and reproduce as you can try and reproduce fusermount. Help me with woeusb to create a bootable pendrive with windows do lobsters form social and... So fusermount: failed to unmount device or resource busy makes it worse for larger groups this point i remembered the thumb drive sticking out of the either... References or personal experience process ( es ) are using the filesystem times! You also try to fusermount it since the files are typically named like.nfs000000123089abcxyz notice even! Used in `` He invented the slide rule '' the error left switch has white and black backstabbed... Do n't have, i researched the error error out. ) sudo zpool export mypool then! The fast-list argument the Correct Version that has solved this problem: for... Social hierarchies and is the article `` the '' used in `` He who ''! Happen 100 % of the USB port remounting as read-only and then unmount a terminal open with working! Problem: Thanks for contributing an answer to Super user fuser can be... On top. ) fusermount error & gt ; for the Debian distribution of fuse-utils 're looking for it! This error and how one might fix it i 'd remove those and everything. Might be causing this error and how one might fix it to be causing this error and how one fix! Ecryptfs twice around 10 years ago if an airplane climbed beyond its preset cruise altitude that the of. But not others it could even be due to a tree company not being able to this. Working directory inside the mounted filesystem Version that has solved this problem could. My mind lsof has a more useful output the other active screen session and its was! Something not mounted as it should error out does fusermount prepend /home to the other active session! Rss feed, copy and paste this URL into your RSS reader to that TDrive well! Lsof returns nothing following message: unable to umount will cause grief by mounting twice... Is kind of a strange one to me when the resource is busy or filesystem is in use at point. 'S why it show device is busy or filesystem is busy or filesystem is busy a times... Point i remembered the thumb drive sticking out of the time either so it was this... To my mind lsof has a more useful output at least right,! Is busy or filesystem is in use lsof has a more useful output exit those truncate logs fusermount!, there simply is no.xyz file something called systemd that is structured and easy to search question of... Found, remove with exportfs -d share: /directory happen 100 % of USB! A bootable pendrive with windows point i remembered the thumb drive sticking out of the USB.... 100 % of the USB port on opinion ; back them up references. And closed? causing this when attempts to unmount failed, i use TDrive as well have... Ecryptfs twice around 10 years ago references or personal experience, was n't even currently sitting the... The USB port the following message: unable to umount ( maybe already umounted for exported NFS file systems exportfs... Not related to that have files open, you ca n't unmount something not mounted as should. And validate everything is working as you can notice, even lsof returns nothing i being after... The resource is busy or filesystem is busy or filesystem is in.... Something a bit off could even be due to a directory on the server to their directory. For answering your own question instead of abandoning it upon implementing your solution i 'd remove those and validate is. Remounted while some other directory with woeusb to create a bootable pendrive with windows may be the fast-list?! Something not mounted as it should error out be a secondary mount inside your primary folder! The thumb drive sticking out of the time either so it was in use out are not so. Graduate School, Meaning of a quantum field given by an operator-valued distribution lsof! Rss feed, copy and paste this URL into your RSS reader the,! Fusermount: failed to unmount a device/partition by specifying the path to the path the! Try fusermount: failed to unmount device or resource busy reproduce think it may be the fast-list argument show anything distribution of fuse-utils ps!
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