Saturday, July 27, 2019

data recovery - Lost all my partition after installing Ubuntu 14.4 LTS





Yesterday I installed Ubuntu 14.04 LTS with a bootable pendrive. Before that I had 3 partitions on my windows system (C:, D:, and E:). During the installation process I thought it would be the same as windows where it formats the C: drive and that Linux gets installed in C:. I chose the second option where it said erase disk and install Ubuntu.



Now I cannot find any of my drives. I have read hundreds of threads in this forum and tons of youtube tutorial to retrieve it by using testdisk but could not figure it out. When I use it with liveUSB it shows two storage systems. When I run (disks) from the application the result shows:



Disk Drives:
500gb Hard disk

Hitachi HTS727550A9E364
Size:500gb
Partitioning : Master Boot record
Device: /dev/sda1
Partition Type : Linux Bootable
Contents : Ext2(version 1.0) not mounted


And below Disk Drives section there is Other Devices which has:




491GB block device
8.5gb block device
967mb loop device


And when I run fdisk -l it shows:



Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00045999

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 976771071 488134657 5 Extended
Partition 2 does not start on physical sector boundary.
/dev/sda5 501760 976771071 488134656 8e Linux LVM


Disk /dev/mapper/ubuntu--vg-root: 491.3 GB, 491333353472 bytes
255 heads, 63 sectors/track, 59734 cylinders, total 959635456 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu--vg-root doesn't contain a valid partition table

Disk /dev/mapper/ubuntu--vg-swap_1: 8464 MB, 8464105472 bytes

255 heads, 63 sectors/track, 1029 cylinders, total 16531456 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu--vg-swap_1 doesn't contain a valid partition table

Disk /dev/sdb: 15.9 GB, 15925772288 bytes
64 heads, 32 sectors/track, 15188 cylinders, total 31105024 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: 0x20ac7dda

This doesn't look like a partition table
Probably you selected the wrong device.

Device Boot Start End Blocks Id System
/dev/sdb1 ? 3224498923 3657370039 216435558+ 7 HPFS/NTFS/exFAT

/dev/sdb2 ? 3272020941 5225480974 976730017 16 Hidden FAT16
/dev/sdb3 ? 0 0 0 6f Unknown
/dev/sdb4 50200576 974536369 462167897 0 Empty

Partition table entries are not in disk order


How do I recover my partitions?



similar questions is alredy been answered here Recover 1TB disk erased with startup disk creator and How do I recover my accidentally lost Windows partitions after installing Ubuntu?




Boot from a live CD or USB.



Install TestDisk and Mount the drive then open a terminal and run



 sudo testdisk 


follow these steps




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here you have to select your hard disk.
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Deeper Search (this should find your old partition, you can stop it after it found it)



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Once you found what you think it's your partition select it with up/down arrows



[P] for list files and look if it seems it



[q] to quit list files




I have changed pictures for better understanding. This is from wiki link at bottom



enter image description here
Using the left/right arrow keys, change the status of the selected partition from D(eleted) to L(ogical). This way you will be able to recover this partition



[enter] continue



When all partitions are available and data correctly listed, you can select Write to save the partition structure.




enter image description here



more detailed step by step instructions for TestDisk data recovery can be found here http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step and here http://www.dedoimedo.com/computers/linux-data-recovery.html


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