lost folder from /mnt and recovering

Question

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 ?

The output of `locate` is cached. The fact that `/mnt/foo` showed up with `locate` does not mean it's actually there. — Andrea Lazzarotto, Jul 13 '16 at 10:00

score 2 · Accepted Answer · answered Jul 12 '16 at 06:33

2

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.

answered Jul 12 '16 at 06:33

gerhard d.

2,168
12
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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))` – Ruwan Ranganath Senarathne Jul 12 '16 at 06:37
I tried `umount -l /dev/xvdb' and now `lost+found` dir from /mnt also gone. – Ruwan Ranganath Senarathne Jul 12 '16 at 06:39
Then the folder has been deleted somehow. What were your original steps for the restore process ? – gerhard d. Jul 12 '16 at 06:41
amazon ec2 , backup image and restore procedure . – Ruwan Ranganath Senarathne Jul 12 '16 at 06:48
since I still have the backup image , will there any possibility to get it back ? with new restore instance ? – Ruwan Ranganath Senarathne Jul 12 '16 at 06:55
If the folder is backed up within the image, surely – gerhard d. Jul 12 '16 at 10:49

KK Patel · Answer 2 · 2016-07-12T06:42:53.827

1

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'

edited Jul 12 '16 at 06:42

answered Jul 12 '16 at 06:36

KK Patel

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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 ? – Ruwan Ranganath Senarathne Jul 12 '16 at 06:47
it looks like it might have been formatted. – KK Patel Jul 12 '16 at 06:55
`cd /dev/xvdb` gives `-bash: cd: /dev/xvdb: Not a directory` output . – Ruwan Ranganath Senarathne Jul 12 '16 at 07:03

lost folder from /mnt and recovering

2 Answers2