I blew up everything while installing ubuntu 13.04 in a machine with ubuntu 12.04 installed in it. I erased the whole data accidentally. I had a separate space called backup in older OS.
Having ubuntu 13.04 currently installed, I want my previous data with ubuntu 12.04 back. I came through How can I recover my data after replacing Windows with Ubuntu? [duplicate], but in my case it's ubuntu 13 replaced by ubuntu 12.
In a live mode of ubuntu 13.04, I downloaded and run testdisk.
STEP 1 : I proceeded with a media(/dev/sda) from list
Select a media (use Arrow keys, then press Enter):
>Disk /dev/sda - 640 GB / 596 GiB - WDC WD6400BEVT-22A0RT0
Disk /dev/sdb - 4022 MB / 3835 MiB - SanDisk U3 Cruzer Micro
STEP 2 : Then I selected Intel as partition and then Analyse category
STEP 3 : I only see following partitions
Disk /dev/sda - 640 GB / 596 GiB - CHS 77825 255 63
Current partition structure:
Partition Start End Size in sectors
1 * Linux 0 32 33 77345 77 44 1242550272
2 E extended 77345 110 12 77825 70 5 7708674
5 L Linux Swap 77345 110 14 77825 70 5 7708672
STEP 4 : I chose to go Quick search
Disk /dev/sda - 640 GB / 596 GiB - CHS 77825 255 63
Partition Start End Size in sectors
>* Linux 0 32 33 77345 77 44 1242550272
P Linux Swap 77345 110 14 77825 70 5 7708672
STEP 5 : In first partition of the list (Linux), I only see currently installed files. (As 'm looking for older backup folder there.)
>drwxr-xr-x 0 0 4096 15-Mar-2014 23:59 .
drwxr-xr-x 0 0 4096 15-Mar-2014 23:59 ..
drwx------ 0 0 16384 15-Mar-2014 23:55 lost+found
drwxr-xr-x 0 0 12288 18-Mar-2014 22:59 etc
drwxr-xr-x 0 0 4096 18-Mar-2014 22:41 media
drwxr-xr-x 0 0 4096 16-Mar-2014 00:01 bin
drwxr-xr-x 0 0 4096 16-Mar-2014 00:02 boot
drwxr-xr-x 0 0 4096 24-Apr-2013 22:51 dev
drwxr-xr-x 0 0 4096 15-Mar-2014 23:58 home
drwxr-xr-x 0 0 4096 16-Mar-2014 00:01 lib
drwxr-xr-x 0 0 4096 24-Apr-2013 22:47 lib64
drwxr-xr-x 0 0 4096 19-Apr-2013 14:48 mnt
drwxr-xr-x 0 0 4096 24-Apr-2013 22:46 opt
drwxr-xr-x 0 0 4096 19-Apr-2013 14:48 proc
drwx------ 0 0 4096 16-Mar-2014 00:11 root
drwxr-xr-x 0 0 4096 24-Apr-2013 22:51 run
drwxr-xr-x 0 0 12288 16-Mar-2014 00:02 sbin
drwxr-xr-x 0 0 4096 12-Jun-2012 00:21 selinux
drwxr-xr-x 0 0 4096 24-Apr-2013 22:46 srv
drwxr-xr-x 0 0 4096 30-Jan-2013 18:43 sys
drwxrwxrwt 0 0 4096 18-Mar-2014 22:59 tmp
drwxr-xr-x 0 0 4096 24-Apr-2013 22:46 usr
drwxr-xr-x 0 0 4096 18-Mar-2014 22:59 var
lrwxrwxrwx 0 0 29 15-Mar-2014 23:59 vmlinuz
lrwxrwxrwx 0 0 33 15-Mar-2014 23:55 initrd.img.old
lrwxrwxrwx 0 0 32 15-Mar-2014 23:59 initrd.img
drwxr-xr-x 0 0 4096 15-Mar-2014 23:58 cdrom
STEP 6 : In a Deeper search,
Analyse Cylinder 2041/77824 02%
Linux 0 32 33 77345 77 44 1242550272
Linux 0 32 31 60 206 16 974848
Linux 0 32 31 60 206 16 974848
Linux 0 32 31 60 206 16 974848
Linux 0 32 33 77345 77 44 1242550272
Linux 0 32 33 77345 77 44 1242550272
Linux 0 32 33 77345 77 44 1242550272
Linux 0 32 33 77345 77 44 1242550272
Linux 60 238 51 12218 100 42 195309568
Linux 0 32 33 77345 77 44 1242550272
Linux 60 238 51 12218 100 42 195309568
Linux 60 238 51 12218 100 42 195309568
Linux 0 32 33 77345 77 44 1242550272
Linux 0 32 33 77345 77 44 1242550272
Linux 60 238 51 12218 100 42 195309568
Linux 60 238 51 12218 100 42 195309568
Linux 0 32 33 77345 77 44 1242550272
Linux 60 238 51 12218 100 42 195309568
Linux 854 98 13 924 127 35 1126400
Linux 0 32 33 77345 77 44 1242550272
When I press Enter, I get something like following in the list
Disk /dev/sda - 640 GB / 596 GiB - CHS 77825 255 63
Partition Start End Size in sectors
> Linux 0 32 31 60 206 16 974848
Linux 0 32 33 77345 77 44 1242550272
Linux 60 238 51 12218 100 42 195309568
Linux 854 98 13 924 127 35 1126400
Linux 1596 214 27 1666 243 49 1126400
* Linux Swap 77345 110 14 77825 70 5 7708672
When I list files for the same partition, I get following message,
Linux 0 32 31 60 206 16 974848
Can't open filesystem. Filesystem seems damaged.
I Want experienced answers.
References
Test Disk - How to Recover Files from a Faulty Hard-Drive
Finally, most of data is recovered properly using R-studio, a paid tool.
R-Data Recovery Studio Guide: How To Recover Data, youtube video
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