Hello Ladies and Gentleman,

I'm new to Linux/Ubuntu 14.04 lts, i installed it 3 months ago and it was working fine until yesterday, i was dealing with Windows 8 in virtualbox. After that i log out from my Ubuntu root session to switch to another one, when suddenly Ubuntu stuck in a blinking cursor, so i have rebooted my PC and it prompts me with grub options, i tried all options which provides me all the time this output:

mount: mounting /dev/disk/by-uuid/53dc799e-7378-49bd-a0e7-93370d11e5551 on /root failed: invalid argument

mount: mounting /dev on /root/dev failed: No such file or directory

mount: mounting /sys on /root/sys failed: No such file or directory

mount: mounting /proc on /root/proc failed: No such file or directory

Target filesystem doesn't have requested /sbin/init

No init found - Try passing init=bootarg



BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu 1) built-in shell (ash)

Enter 'help' for a list of built-in commands

(initramfs) _

This is my "uname -a" output:

Linux ubuntu 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Some additional infos maybe helpful:

• My external hard drive was plugged in when i rebooted my PC.


• I have a Sony Vaio Intel Core i3 / 3GB RAM / 320 GB TOSHIBA MK3265GSX (GJ002H) Hard drive.


• I have from a long time (when i was using Windows 7) a Smart internal harddisk Failure Predicted message when i start my PC but i use it normally.


• When i try to open my harddrive with Ubuntu LiveCD boot it show this in a box:
  
  
  

  
  

  
  Error mounting filesystem

  
  
  
  Error mounting /dev/sda1 at /media/ubuntu/53dc799e-7378-49bd a0e7-93370d1e5551: Command-line `mount -t "ext4" -o "uhelper=udisks2,nodev,nosuid" "/dev/sda1" "/media/ubuntu/53dc799e-7378-49bd-a0e7-93370d1e5551"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/sda1,
  
  

    missing codepage or helper program, or other error
  
    In some cases useful info is found in syslog - try
  
    dmesg | tail  or so
  
  

  
  
  

  (udisks-error-quark, 0)####
  

If someone could help me, it would be great. (Sorry for my bad English !)

NEW EDIT:


I enjoy your opinion @JavierRivera, maybe i have to try boot-repair link to retrieve my data.
by the way this is last part of dmesg output which i see is related to my problem:

[ 445.456676] ata1.00: status: { DRDY ERR }
[ 445.456681] ata1.00: error: { UNC }
[ 445.508901] ata1.00: configured for UDMA/100
[ 445.508936] sd 0:0:0:0: [sda] Unhandled sense code
[ 445.508942] sd 0:0:0:0: [sda]

[ 445.508945] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 445.508949] sd 0:0:0:0: [sda]

[ 445.508952] Sense Key : Medium Error [current] [descriptor]
[ 445.508957] Descriptor sense data with sense descriptors (in hex):
[ 445.508959] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
[ 445.508969] 12 44 97 99
[ 445.508973] sd 0:0:0:0: [sda]

[ 445.508976] Add. Sense: Unrecovered read error - auto reallocate failed
[ 445.508979] sd 0:0:0:0: [sda] CDB:
[ 445.508981] Read(10): 28 00 12 44 97 98 00 00 08 00
[ 445.508990] end_request: I/O error, dev sda, sector 306485145
[ 445.509016] ata1: EH complete
[ 445.509052] JBD2: Failed to read block at offset 4595
[ 445.509067] JBD2: recovery failed
[ 445.509071] EXT4-fs (sda1): error loading journal

I have to retrieve my data, so an attention from your part would be Seriously Geekly Great !