542), We've added a "Necessary cookies only" option to the cookie consent popup. fuser -v /path gives: which is normal for all unused mounted file systems. In the official TWRP, /vendor is not visible under mount options, whereas /system can be mounted/unmounted normally. 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". Would love your thoughts, please comment. Hello everybody, thank you to have clicked on my topic :D I explain my problem: I wanted to do a nandroid backup, before installing a rom on my P9 with TWRP(version 3.1.1-0), I have selected "Boot," "System," and "Data" (as usual) But a message. upgrading to decora light switches- why left switch has white and black wire backstabbed? ): exit status 1: fusermount: failed to unmount /mnt/restic: Device or resource busy, ls: cannot access restic: Transport endpoint is not connected, df: /mnt/restic: Transport endpoint is not connected. The device won't be mounted, and when you're finished doing whatever, remove flag and reboot again. that's providing the fileystem. Linux is a registered trademark of Linus Torvalds. You should fix whatever the upstream is rather than using options that add no value/make things complex. 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 That's the same behavior I'm seeing. 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. already one commenter on the accepted answer seems to have done that. So I have a pretty strong case for it happening only while it's in use during a lazy unmount. For example, I stop the service, reload daemon, restart them. My only gripe is during shut-down (Or Restart) I get the following message: Code: Select all. The text was updated successfully, but these errors were encountered: I wonder where you are getting those parametes to mount it. rev2023.3.1.43266. Browse other questions tagged. --fast-list does nothing on a mount can can be removed.'. 1 Connect and share knowledge within a single location that is structured and easy to search. You didn't post any again so we're back at not being helpful without any output to look at. Uhm, wasn't that the idea of the OP? Why Device or resource busy whent to remove the file? Make your own judgement as to whether to make them close files, kill them, or defer the unmount operation. df: '/mnt/restic': Transport endpoint is not connected. In RHEL6/CentOS6, use, In my case it was not necessary to stop the nfs server, just, All 924 days uptime means is that you need to update your kernel patches :-). 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. Running Ubuntu, man fusermount tells about a -z option, which is documented as "lazy unmount". 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. 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. [*] All kadaitcha men are liars. Open files aren't the only unmount blocker. I was really confused for ages because I couldn't get rid of it -- I kept getting "Device or resource busy"! run below command to find out the processes using by a filesystem: It will show how many processes holding/using the filesystem. Exiting the terminal or changing directories to a local share then running fusermount -u solves my problems. So I can run commands in the directory. 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). 'If you use -uz, it'll unmount and kill the process once the filesystem is not in use: For me, the offending process was a daemon running in a chroot. How do I delete an exported environment variable? When I stopped the nfs-kernel-server I could umount the directory. No clue why. How does a fan in a turbofan engine suck air in? unable to umount (maybe already umounted? Writes to open files can continue. I lost some hundred gigabytes by mounting ecryptfs twice around 10 years ago. I had this issue, and it turned out that there were active screen sessions in the background I didn't know about. Why do we kill some animals but not others? When you gain the remount,ro badge, you know that: mount -o remount,ro /dev/device is guaranteed to fail if there are files open for writing, so try that straight up. I only really use TDrive. . So I guess I mounted it twice in the end to the same location? Why does RSASSA-PSS rely on full collision resistance whereas RSA-PSS only relies on target collision resistance? 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). Ubuntu 18.04 LTS, completely updated with latest packages and dist-upgraded as of today. So, after I manually unmounted it lots of times it finally became a regular folder again and I could delete it. You either have a bad source of information or are just making stuff up. mkfs.ext4 /dev/sdb1. A second umount2() call specifying MNT_EXPIRE unmounts to run. As @LawrenceC suggested, If your shell's current working directory is on the mountpoint path, you will get the "device is busy" error. How do I figure out why the kernel thinks this filesystem is busy? Well occasionally send you account related emails. Perhaps related to this change, which was introduced in v1.48 870b153. That doesn't return anything. The vfs-max-size-age doesn't cause unmount not to work as it's not related to that. I'm not sure whether quotas could ever prevent an unmount I was clutching at straws. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, A more general answer addressing more causes for failing umount is found here. 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. Not the answer you're looking for? @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. In my case it was docker that was holding the file. sda3 Your systemd file is also not quite right. 7. So share those logs and the same output as above if you can reproduce it. Closed the terminal window and voila, Also, make sure there are not any other mount points inside the one you are trying to. One must use it with the -u, the -z option alone, will produce an error. Output information may be incomplete. It's been working just an odd error randomly when unmounting. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. ): unable to umount (maybe already umounted or still in use? ): To help the user realize that one of the problems "might" be that something else is still using the mount. behaviour of the operation: MNT_FORCE (since Linux 2.1.116) Force unmount even if 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. 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. Are you only seeing the error in systemd? thanks for the help. Once I exit this bash, then the unmounting and, Hi @DOBRESCU_Mihai! OP expressely stated that his current working directory was. thanks for the help. Hide the original mount point and block the namespace: The original namespace hidden (no more files could be opened, the problem can't get worse), A duplicate bind mounted directory (as opposed to a device) on which Jordan's line about intimate parties in The Great Gatsby? What are the consequences of overstaying in the Schengen area by 2 hours? Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? At the time of writing, the top-voted answer recommends using umount -l. umount -l is dangerous or at best unsafe. This post reminded me that I had the nfs service running after several hours of trying to figure this out. You seem to know what arguments work with what commands, I don't. we need to check is any process holding or using the filesystem. It would be more complex trying to only add the arg if it's non-default. Then those messages shows up for second. UNIX is a registered trademark of The Open Group. (Please give as answer a simple "unlock this" method, and not complete articles like this one. I tried to rm -rf a folder, and got "device or resource busy". It's gotta be because the drive is randomly in use. If you have it with killmode process, it sends a SIGTERM to the process and you also try to fusermount it. 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). 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. Making statements based on opinion; back them up with references or personal experience. A code search did not find that string. is now solved. 12G/data1 [] [1684]: Unmounting '/var'. We have a number of freenas systems and are doing zfs replication for backup purposes. Browse other questions tagged. [ 4044.873100] sd-umount[8299]: Failed to unmount /oldroot: Device or resource busy [ 4044.839977] sd-umount[8300]: Failed to unmount /oldroot/sys: Device or resource busy [ 4044.290367] shutdown[1]: Failed to finalize file systems, ignoring. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Super User is a question and answer site for computer enthusiasts and power users. we need to check is any process holding or using the filesystem. $ sudo umount -l ~/gdrive OK sudo Memo The "restic" mount apparently failed to un-mount automatically. Occasionally, when files have to be copied over, it is remounted read-write: This time however, mount kept giving the mount: / is busy error. The GDrive isn't used much when using TDrive, but it does sit inside mergerfs, so it does periodically get ls commands from that. You se Hopefully at this point, you can unmount the device. 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. "Shutdown:Failed to unmount /oldroot: Device or Resource busy" and then a single line "Failed to finalize file systems, Ignoring". 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 '
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