Umount target is busy. We also took a step back to understand the fundamentals of file systems, and the concepts of mounting and unmounting, which underlie the ‘umount’ command. For more information, see Section 19. Suppose you have /dev/sda1 mounted on /mnt directory then you can use fuser command as follows: WARNING! This comment explains why inotify shouldn't prevent an unmount, but this note describes the situations in which it will: an unmount can hang in the vx_softcnt_flush() call. # umount /cdrom. by name | kill PID | killall target_process) umount /dev/sda1 (or whatever the mounted device is) Feb 1, 2016 · 1. When you cannot wait to properly umount a busy device, use umount -f as shown below. If restarting samba allowed you to unmount the drive it means some client on your network connected to the samba share and was still connected. If the target is busy, issue a warning to the user, using whiptail. I' If possible, let's locate/identify the busy the process, kill the process and then unmount the samba share to minimize damage. 3. umount /path/to/mount. Jul 8, 2022 · アンマウント. Find out how to kill processes, forcefully unmount filesystems, and prevent the error from happening again. If I type " mount ", it appears that the directory is no longer mounted, but it hangs if I do " ls /mnt/data ", and if I Apr 21, 2023 · Unmout target by killing the process itself (recommended) Another way to fix the issue is by killing the process. I I had Windows installed before installing Fedora (just installed) and the drive had worked up to that point. Usually closing any programs ( and explorer windows) on the clients that may be accessing the share and then waiting about 30 seconds to a minute is enough for the The umount command detaches the file system (s) mentioned from the file hierarchy. The lsof command, without options, doesn't print the device on which a file is located, therefore your grepping for nvme returns nothing. -f, --force Force an unmount (in case of an unreachable NFS system). You need to run mount --make-rprivate /mnt before you can safely unmount it. localdomain systemd: Unmounting /opt Oct 16 15:48:00 localhost. Nov 12, 2019 · Unmount the device: sudo umount /dev/sdc1. " You must tell umount which file system you are unmounting. Now, run the following command to kill the process with PID. sets up the loop device /dev/loop3 to correspond to the file /tmp/disk. umount -l /path/to/mount. If you run. localdomain systemd: opt. I'm attempting to run fsck -p /dev/sda5 to repair errors on an ext4 partition, however the command outputs fsck from util-linux-ng 2. cd /test_dir. However, after troubleshooting, it is found that no process is occupied. Linux コマンド 1) Ask the owner of the process to properly terminate it or 2) You can kill the process with super user privileges and unmount the device. The -p option tells fsck to automatically repair any problems that can be safely fixed without user intervention. Run fsck to repair the file system: sudo fsck -p /dev/sdc1. It would thus work like this: #!/bin/bash. # umount -l /mnt/nfs. ) I tried some different options with the command lsof and fuser , but it didn't work so far. デバイスへのプロセスが停止していることを確認出来たら下記コマンドでアンマウントします．. Nov 6, 2021 · A loop device is a "pseudo device" which allows a file to be mounted as a filesystem. 사용하고 있는 Apr 28, 2020 · Its only started happening recently, and is the /mnt/cache unable to unmount. $ umount: /mnt/data: device is busy. Code: Select all. Lazy unmount. . Sometimes when I want to umount a device, e. 1. Any ideas what I can do if this happens again. これはなんらかのプロセスによってデバイスが使用されている場合に発生するエラーです。. Unfortunately those commands Aug 17, 2021 · umount: /home: target is busy. # umount -f /mnt If it still doesn’t work, lazy unmount should do the trick. 17. To unmount a mounted file system, use the umount command. 5 I am trying to either Stop my array or reboot/shut down. If problem still continues then forcefully unmount the cdrom: # cd /. Thanks. 116 or later. Check For Loop-Mounted Devices. At least, it appears to (-l means Lazy Unmount, Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore. 该报错通常是由于待卸载磁盘正在使用，导致无法直接卸载。. 2. Solution. This command attempts to unmount the filesystem associated with the device /dev/sdb1. The -f choice is for unreachable NFS system (NFS server going down). Identify which processes tied to the mount need to be killed by using lsof and fuser: The umount command detaches the mentioned filesystem(s) from the. 누군가 마운트된 경로를 사용 중일 때 target is busy라고 나오게 되는데, 해당 프로세스를 강제로 kill한 뒤 언마운트하면 됩니다. But I have a python script that deletes the files (automated process). filesystem lives may also work, but is obsolete, mainly because. マウント先に cd しているユーザーが存在していることが原因で、umount コマンドを実行するとエラーが発生して、アンマウントすることができませんでした。 例えば、以下の場合、エラーが発生します。 ユーザ Aが. In order to solve this problem. Eject Micro-SD card safely and insert it into the Raspberry Pi. It simply returns the same nasty device is busy message. But take care! mount --make-rslave m. fuser -cu 마운트경로. Today for some unknown reason mount and umount is working fine. lsof /var/lib/snapd/snap/*. com/questions/7878707/umount-a-busy-device. 11 or later. If the device file for your USB drive still exists, then probably it is still writing some data. Jan 8, 2024 · Linux fuser command to forcefully unmount a disk partition. Feb 14, 2023 · Kill these processes: $ pkill target_process. 누가 사용하고있는지 확인. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) autofs は Linux での「Umount Target is Busy」エラーの修正. A file system is specified by giving the directory where it has been mounted. Members of the system group and users operating with root user authority can issue any umount command. 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. umount コマンドの使用中に発生する、それほど珍しいエラーではありませんが、「ターゲットがビジーです」というエラーがあります。. I'm going to put this into a UserScripts script, in case I need it again, then I can fire it off. If this does not help, you can force unmount such a partition or device (which may cause data loss in open files). 2 fsck. The message means that the filesystem on the device is in use. You can always use the df command or mount command to list mounted file systems under Linux and Unix. Note that programs may not expect a force or lazy unmounting. Sometimes I get "Device or resource busy error" when the script tries to delete the files. このエラーを取り除くために何ができるかを学びましょう。. systemd fails to unmount /opt when shutting down the system. I mounted a remote file system using sshfs (version 2. I unmounted a USB device with sudo umount /dev/sdXn, but it is still listed with ls /dev/sdX*, even though nothing is being written to the USB device. If a process is occupying the disk, it is OK to exit. Apr 21, 2020 · 8. Failed to unmount /oldroot/dev/pts: Device or Resource busy. Thank! – Matt. When I run the "umount" command, system says: umount: /backup: target is busy And following commands does not work and same reason (busy) returns to me: fuser -cuk /backup fuser -k -9 /backup umount -f /backup mount -o remount /backup; umount /backup and Mar 17, 2024 · “Unmount target is busy” means that the operating system is unable to unmount the specified target, such as a disk partition or a mounted directory, because it is currently being accessed or Mar 12, 2023 · 2. -l Lazy unmount. The manpage has this to say about it: umount - unmount file systems. # umount /opt umount: /opt: target is busy. If that's not the case, you probably have a reboot in your near future. ”等字样，或者“umount: /xxx: device is busy. 需要将当前使用数据盘的进程杀掉，才能卸载 Fail to umount /boot with error target is busy. Sophos antivirus is Column 1 Column 2 Column 3; umount / target is busy: Description: The umount command failed to unmount the / directory because it is still in use by another process. Feb 16, 2021 · umount target is busy. 2 Answers. Profit. May 2, 2022 · Umount: Force – Target | Device is Busy. lsof | grep '<mountpoint of /dev/sda1>' (or whatever the mounted device is) pkill target_process (kills busy proc. Failed to unmount /oldroot/sys: Device or Resource busy. You cannot unmount a directory that you are currently working in or have open files in. Dec 24, 2023 · For tricky cases where you're unsure, these commands can help pinpoint the culprit: lsof | grep /mount/point: Lists open files on that drive. localdomain umount: umount: /opt: target is busy. ) How to unmount the sshfs share? UPDATES: Nov 12, 2017 · The remount functionality follows the standard way how the mount command works with options from fstab. The command displays all the processes using the filesystem. $ umount2: Device or resource busy. Please be aware that programs may not expect a force or lazy unmounting and The tool you want is lsof, which stands for list open files. When I try to do so, I get a message: umount: /home device is busy (which processes use this device can be possibly be found with lsof or fuser) To use SMIT, enter: smit umount. It was a secondary drive btw / not the boot drive. Jul 19, 2008 · Does anyone know how I can make /mnt/gentoo not busy? I don't see any terminals open to a directory in /mnt/gentoo, and I've unmounted all filesystems under /mnt/gentoo. ) %Error: could not unmount bootflash /bin/ln: failed to create symbolic link '. Copy. /example. $ mount. Dec 26, 2023 · Learn what causes the umount: target is busy error and how to resolve it. 问题原因 ：. Btw im using putty from windows 7 os to talk to the pi and the commands Im using are below. ” When it comes to avoiding the common issue of “umount target is busy,” there are several you can take to ensure a smooth and hassle-free unmounting process. You could check in terminal using ls /dev/sd*. As root check these (assuming POOLNAME=<yourpool>):. There are two options for unmounting a device: Lazy unmount: in this mode, Linux will hide the mount You should find out which process is keeping the mountpoint busy. target is busyやdevice is busyをumountする方法. What other tests should I try so that I can get to the true root cause and thus hopefully fix the stuck mount without reboot on a system I can't presently restart for a while as well as prevent this Apr 24, 2020 · 6. Apr 17, 2021 · When I try to unmount it with sudo umount /media/Nas6To i get a message telling me that the device is busy, and I cannot unmount it: thomas@NZXT:~$ sudo umount /media/Nas6To umount: /media/Nas6To: the target is active. Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore. umount: /mnt: target is busy 34. 1 GB The unmount option allows you to disengage a device that sends busy signal at once, even if it is busy. The force umount Linux option uses: -f, –force. Then you can decide if you want to kill the process to umount the dir. sudo mount /dev/sda1 ~/usb. fuser -m /mount/point: Shows processes using files on that drive. For example, the command: mount /tmp/disk. The umount command unmounts a previously mounted device, directory, file, or file system. To unmount the device, you must first stop all processes that are using it. It ALWAYS gets stuck with "Unmounting disksRetry unmounting disk share(s)" and I am forced to use IPMI to force a reboot. sudo kill -9 [PID] Appropriate privilege (Linux: the CAP_SYS_ADMIN capability) is required to unmount filesystems. Identify which processes tied to the mount need to be killed by using lsof and fuser: Jan 22, 2021 · How to unmount NFS mount that fails to unmount with ‘device is busy’. umount /media/hdd1 # Device umounted without any problems continuing the script. When the last program accessing it exits, the unmount will actually occur. Run umount command as follows: # cd /. 原因. above mentioned solution does not always work: Jun 20 01:15:09 Dose4000 emhttpd: Unmounting disks Jun 20 01:15:09 Dose4000 root: umount: /mnt/disk1: target is busy. Jan 2, 2020 · 其中，umount加-l参数强行解除挂载是最简单的办法，但如果有数据正在读写，容易造成数据损坏，操作时应当心中有数。 本文参与 腾讯云自媒体分享计划 ，分享自作者个人站点/博客。 Feb 23, 2019 · 3. Without the first command, you risk unmounting all the sub-mounts on the source, due to mount propagation. To forcibly unmount a file system, you can use the -f option. But often the force does not help. com: . Jul 13, 2020 · Linux下挂载后的分区或者磁盘某些时候需要umount的时候出现类似“umount: /mnt: target is busy. 04 to 20. the device is found by lsof(8) or fuser(1)) Oct 28, 2019 · device is busy 解决方法 步骤一：取消挂载时可能出现的报错. 2, “Specifying the Mount Options”. sudo umount /dev/sda1. Look through the output for application and process names that you can then properly close or terminate, freeing up the resource. g. It only "moves" the mount to the root of the system, which can be seen as follows: Feb 15, 2021 · lvextend can only increase the size. umount -l /opt will probably let you unmount /opt without also /opt/mongo, but that will mess up the /opt/mongo mount rather than leave it alone. # mount -t nfs -o remount /mnt/nfs. umount -f /PATH/OF/BUSY-NFS(NETWORK-FILE-SYSTEM) Reference: https://stackoverflow. ) Jan 22, 2021 · How to unmount NFS mount that fails to unmount with ‘device is busy’. 04 I've notices several warnings during shutdown or reboot like: Failed to unmount /oldroot: Device or Resource busy. 8. answered Apr 21, 2020 at 8:01. > fusermount -u example. you will get the pid (s) of running process. To know what is the full command line: ps uww <PID>. # umount /mnt/nfs. umount: /mnt: device is busy. Oct 9, 2017 · I've had this issue as long as I remember, literally years. (In some cases useful info about processes that use. Target device is busy, please make sure you unmount all filesystems on target device or shutdown the computer before detaching it. Share. : Dec 8, 2020 · Sometimes when we want to "umount" a filesystem, we get a "device busy" message. This has nothing to do with being mounted. The lsof command displays the files that are open on a certain filesystem: The mount point of the filesystem could be for example : /usr . Try umount -l /mnt/c . # umount -f /mnt/nfs. I've tried to force an unmount, but it doesn't seem to work: $ umount -f /mnt/data. The umount command detaches the file system (s) mentioned from the file hierarchy. img /mnt -t vfat -o loop=/dev/loop. /home is not mounted multiple times, but is spread over multiple physical volumes. The mount will be removed from the filesystem namespace (so you won't see it under /mnt/Zia/src anymore, in the example) but it stays mounted, so programs accessing it can continue to do so. as this is the first site google spits out with the search "unraid array won't stop" i will try to append my problem. Consequently, my script fails. Or by PID: $ kill PID. An umount command is used to unmount a device/partition by specifying the path to the directory where it has been mounted. img, and then mount this device on /mnt. sudo umount /mnt. ext4: Device or resource busy while trying to open /dev/ Sep 15, 2018 · Error: Target device is currently busy, unmount all mounted partitions in target device then try again. 4. Maybe I had missed the r off --make-rprivate. – Steve Bonds. Unpredictable application behavior can result. Linux 2. I have tried, but I cannot umount /home. According to the man page it does the following. You can unmount /home if it's an independent file system. # umount -lf /mnt/nfs. Mar 15, 2018 · NYC-4331#fsck bootflash: umount: /bootflash: target is busy (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1). 当取消某一个目录的挂载时，出现以下报错，则说明此目录可能正在被使用： （1）当使用 umount 命令时出现类似 “umount: /xxx: target is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) Autofs does Dec 6, 2018 · There are quite a few things in Linux which can keep a ZFS pool busy, blocking export and destroy commands. See examples and explanations for each method. Mar 24, 2023 · Learn why the umount command fails with 'target is busy' error and how to solve it in three ways: killing the process, using force unmount, or using lazy unmount. target is busy. I will get the message. Giving the special device on which the. # umount /boot umount: /boot: target is busy. That will recurse through the filesystem under /path, so beware doing it on large directory trees. Aug 24, 2018 · In order to unmount a filesystem, you must unmount its submounts first (and the same for their submounts, recursively). . Nov 2, 2016 · mount: /dev/xvdg already mounted or /data busy. At this time, a command needs to be used: fuser (use file or file structure to identify the process) fuser -m -v /dev/vdb. OR try the following command: May 11, 2014 · I was told to umount /home, mount it on a different location and copy the contents to the /home directory on the / partition. Nov 3, 2017 · WoeUSB requires that the target device (the USB drive that you inserted) be unmounted before it can write anything to it. but unmounting it fails. Then the only option is to use the lazy mode: umount /mnt/smb_share -l. Open the Disks application, select the USB device that you inserted in the left pane of Disks and unmount it. The Target is busy message means that there are either: files under /home that are still open. You may tried to use this command to check if the partition is ok: ntfs-3g. directories under /home that are the CWD of some process (this could be the shell from which you try to unmount /home) a filesystem mounted on a mount point under /home. -l, --lazy. umount: /home/joeuser/example: device is busy. type "pwd" on the command line, this will tell you the current directory that you are in. Once you know which processes have files open, you can exit those umount has an -l option to perform a lazy unmount. Dec 3, 2016 · Knutowskie. Processing on the file system, directory, or file completes and it is unmounted. Apr 28, 2019 · Why am I unable to umount? user@azimuth:~$ sudo umount /home/user/pi [sudo] password for user: umount: /home/user/pi: target is busy (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1). mount mount process exited, code=exited status=32 Oct 16 15:48:00 localhost. Oct 27, 2020 · umount时目标忙的解决办法 一、第一种情况是可能你当前所在路径已经在挂载目录下，需要切换到别的目录才能umount成功。二、第二种情况是没有在挂载目录，但是umount时，始终无法umonut，可以通过fuser查看设备被哪个进程占用，之后杀死进程，就可以顺利umount了。 umount /mnt/smb_share. ) – Nov 1, 2020 · Option 1: Force unmount. Examine The Kernel Data Structures. Apr 5, 2017 · Thanks, this helped. Goal. umount -R m. sudo umount /dev/loop0. Improve this answer. To detach a previously mounted file system, use either of the following variants of the umount command: Note that unless this is performed while logged in as root, the correct permissions must be available to unmount the file system. If you are in the directory that you are trying to unmount, cd to another directory. 김보야 2018. ” 等字样 （2）当使用 umount 命令时出现类似 “umount: /xxx: device is Jul 27, 2018 · Re: How to unmount a "busy" USB Post by gm10 » Sat Jul 28, 2018 8:03 am Boca wrote: ⤴ Fri Jul 27, 2018 10:33 pm Also, the stick is not recognised by another Linux box nor by a , dare I say, Windose box. Filesystem references like open files, current directories etc. However, if this filesystem is in use – say, you have a terminal open that’s accessing I have an NFS-mounted directory on a Linux machine that has hung. I'm on 6. # fuser -km /cdrom. Open Linux File System for Windows and umount the SD card. Linux. For example: umount /dev/sdb1. 4. Oct 25, 2023 · Click to get started! In this Document. In this case that means all the sub-mounts of /dev, which would have I had this problem recently and neither fuser or lsof would show anything using the device, but umount -l allowed me to unmount it. BUT: This does not unmount anything. Jul 20, 2015 at 8:15. Apr 26, 2014 · None of the above tests have results that point to filesystem use, however umount -f still complains "Device or resource busy" / "device is busy". edited May 23, 2017 at 12:39. 116) Ask the filesystem to abort pending requests before Oct 14, 2018 · So basically, what I would like to do, is somehow make the umount command wait, until the device is not busy and then umount the HDD and continue executing the script. 2. /sda1': File exists mount: /dev/sda1 is already mounted or /bootflash busy /dev/sda1 is already mounted on Jun 30, 2018 · 3. Try lvreduce or lvresize instead, but be very careful not to reduce too much. probe --readwrite /dev/sda2. where it has been mounted. You then end them (normal close, or kill as shutdown would do) and try to unmount again sudo fusermount -u /mnt/remote) The unmount command fails if the file system is busy. The directory and docker installation were on WSL and Docker for Windows was connecting to it for easier administration. 17:23. The lsblk output is as below : Any help will be appreciated. ”。. Linux umount Aug 18, 2023 · Unmounting the ISO Image. If you are attempting to unmount a NFS command like. Column 1 Column 2 Column 3; umount: target is busy: The target device or filesystem is currently in use by another process. (Requires kernel 2. This option allows a "busy" filesystem to be unmounted. the device is found by lsof(8) or fuser(1)) I usually solve this issue by closing a console window (in my case xfce4-terminal) and then umount. So: Sep 6, 2015 · DBMandrake 6 September 2015 19:56 5. 1. There are options of umount to detach a busy device immediately even if the device is busy. Be cautious when forcibly unmounting a file system if its contents are actively being used. umountコマンドを実行すると、target is busyやdevice is busyと出てマウントを解除できない場合があります。. See the question Mounting new filesystem affects non-recursive bind mounts? I thought I had tried this, but something went wrong. umount: /: target is busy (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1). Please try this commands: umount -l /PATH/OF/BUSY-DEVICE. Mar 1, 2017 · How to get over "device or resource busy"? The above solution works when you are manually deleting the file. umount /media/hdd2 # Device is busy! Nov 21, 2023 · This guide offers insights and solutions to tackle this issue, explaining how to identify processes using the mount point and safely unmount filesystems, ensuring smooth system operations without data loss or corruption. For example: $ df -hT. You need to shrink ext4 offline anyhow. Oct 16 15:48:00 localhost. Use Lazy umount (8) Use Forced Unmount. Oct 30, 2023 · Learn the causes and solutions of the common Linux headache "umount target is busy" when trying to unmount a disk or filesystem. Dec 31, 2007 · A. Feb 14, 2016 · 0. One common non-process reason for a mount that won't move is another filesystem mounted on top, e. The directory I was trying to remove was setup in the "volumes" section, in one of my docker-compose files. 26. Force an unmount. I want to fix this once and for all. The hang occurs because inotify watches increment the i_count variable and cause the v_os_hold value to remain elevated until the inotify watcher releases the hold. Failed to unmount /oldroot/dev: Device or Resource busy. Then, I tried un-mounting it as follows : umount /dev/xvdg but it tells me that the volume is not mounted. いろいろ調べた結果、たどり着いた解決法がこちら。. sudo lsof /Path/to/target. At first glance, it is very simple. Insert Micro-SD card into a Micro-SD card reader and insert it into your PC. を実行 I'm trying to unmount a backup filesystem that I don't need anymore. Only users with root authority or are # mount -t ntfs /dev/sda1 /mnt/dominik/ fuse: mount failed: Device or resource busy This is my fdisk -l if that helps. Do so by providing the file system's mount point. or force mode: umount /mnt/smb_share -f. # fdisk -l Disk /dev/sda: 640. umount -l /sdd. Detach the filesystem from the file hierarchy now, and clean up all references to this filesystem as soon as it is not busy anymore. Most likely open file handles will keep working, but new ones will not work until you mount it all back, and many programs might fail with this happening. After Upgrading from 18. /home/some-other-mount. It seems that it's only Docker-related that is causing this issue, for me at least. Sorted by: 29. Click the black square marked by a red arrow in the below screenshot to unmount the selected partition. Try to unmount the device again: $ sudo umount /dev/sda2. The remount option is used when the file system isn't currently in use to modify the mount option from ro to rw. 4) sshfs -o allow_root joeuser@example. Find out how to use fuser, lsof, sync, kill, umount options and more to resolve this issue. Mar 26, 2024 · Precautions to Avoid “umount target is busy. Giving the special device on which the file system lives may also work, but is obsolete, mainly because it will fail in case this device was mounted on more than one directory. Use /proc/<pid>/fd. Oct 16, 2021 · すると target is busy のエラーが返ってきて、アンマウントできなかった。. I have found on different post using fuser and lsof to identify the process keeping it busy. You probably can't properly do it. Once the file system is repaired, mount the partition: sudo mount /dev/sdc1. Sep 6, 2019 · My final goal is to umount the USB. file hierarchy. Forcefully umount a busy device. It means the mount command doesn't read fstab (or mtab) only when a device and dir are fully specified. umount: /dev/xvdg is not mounted (according to mtab) I tried lsof to check for any locks but there weren't any. 116 added the umount2 () system call, which, like umount (), unmounts a target, but allows additional flags controlling the behavior of the operation: MNT_FORCE (since Linux 2. The syntax is straightforward: umount [options] <mountpoint|device>. 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 19. Note that there is no "n" between the "u" and the "m"---the command is umount and not "unmount. ) The -f option is for unreachable NFS system. localdomain systemd: Failed unmounting /opt. This will run fsck -fy on the volume and fix any errors present. Nov 21, 2023 · In Linux, umount is the command used to unmount a mounted filesystem. Edited September 16, 2022 by KptnKMan. それでもアンマウントできない場合， -l オプションを追加すると大抵うまくいきます．. Unmounting a File System. -l オプションは、すぐにシステムから切り離して新規のアクセスを禁じ、現在実行している参照が全てなくなった Dec 19, 2023 · Along the way, we tackled common issues users may encounter when using ‘umount’, such as the ‘target is busy’ error, and provided solutions and workarounds for each. Select the volume and click verify. For example this: lsof /mnt/remote will list those processes (there could be many). First, run the following command to find the PID of the process that is creating the problems. Apr 26, 2018 · 리눅스 언마운트 (umount) target is busy 발생할 경우. A filesystem is specified by giving the directory. ez gm uf vd bt rx ok ld au pt