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I'm running Ubuntu 14.04.2 LTS (GNU/Linux 3.13.0-48-generic x86_64) on Amazon AWS. I had a folder "foo" in the /mnt and after few modification I had to recover to previous backup of the instance .
after restore "/mnt/foo" folder is missing , however when I tried "locate foo" it showed me on in "/mnt/foo" .

then I did updatedb command and then /mnt/foo no longer visible in the locate foo command.

/mnt only have lost+found directory .

df command give following. 

Filesystem 1K-blocks Used Available Use% Mounted on /dev/xvda1 8115168 6991056 688836 92% / none 4 0 4 0% /sys/fs/cgroup udev 3824796 12 3824784 1% /dev tmpfs 765952 352 765600 1% /run none 5120 0 5120 0% /run/lock none 3829752 0 3829752 0% /run/shm none 102400 0 102400 0% /run/user /dev/xvdb 30824956 45140 29207336 1% /mnt

and sudo fdisk -l gives following . 

Disk /dev/xvda: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders, total 16777216 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/xvda1 * 16065 16771859 8377897+ 83 Linux Disk /dev/xvdb: 32.2 GB, 32204390400 bytes 255 heads, 63 sectors/track, 3915 cylinders, total 62899200 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/xvdb doesn't contain a valid partition table

edit 1 :

fsck shows , 

fsck from util-linux 2.20.1 e2fsck 1.42.9 (4-Feb-2014) /dev/xvdb is mounted. e2fsck: Cannot continue, aborting.

What can be happened to the directory "foo" in the /mnt and is there any possibility that I can get it back ?

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  • The output of locate is cached. The fact that /mnt/foo showed up with locate does not mean it's actually there. Commented Jul 13, 2016 at 10:00
  • @AndreaLazzarotto yes , I did a : updatedb Commented Jul 13, 2016 at 10:28

2 Answers 2

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You propably mounted the partition /dev/xvdbover the original /mnt ? Try 

umount /dev/xvdb

an see, if the folder is there. If so, move it to some other partition, then re-mount /dev/xvdb and move the folder back.

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  • output for umount /dev/xvdb umount: /mnt: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) Commented Jul 12, 2016 at 6:37
  • I tried umount -l /dev/xvdb' and now lost+found` dir from /mnt also gone. Commented Jul 12, 2016 at 6:39
  • Then the folder has been deleted somehow. What were your original steps for the restore process ? Commented Jul 12, 2016 at 6:41
  • amazon ec2 , backup image and restore procedure . Commented Jul 12, 2016 at 6:48
  • since I still have the backup image , will there any possibility to get it back ? with new restore instance ? Commented Jul 12, 2016 at 6:55
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You can create /mnt/foo mount point and mount /dev/xvdb using following commands. 

sudo umount /mnt sudo mkdir /mnt/foo sudo mount /dev/xvdb /mnt/foo

If you are getting device busy,find process running with device and kill it 

lsof | grep '/dev/xvdb'
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  • I've followed these steps and in the /mnt/foo directory it only have lost+found , I did cd lost+found and ll only shows .swp file in it . seems I lost the directory ? Commented Jul 12, 2016 at 6:47
  • it looks like it might have been formatted. Commented Jul 12, 2016 at 6:55
  • cd /dev/xvdb gives -bash: cd: /dev/xvdb: Not a directory output . Commented Jul 12, 2016 at 7:03

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