Partition-table-recovery

• https://www.tldp.org/HOWTO/Partition/recovering.html

$ mount | grep sda
/dev/sda1 on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
/dev/sda6 on /home type ext4 (rw,relatime,data=ordered)
/dev/sda5 on /var type ext4 (rw,relatime,data=ordered)

$ df -h | grep sda
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1        37G   11G   24G  32% /
/dev/sda6        18G  9.3G  7.3G  57% /home
/dev/sda5        92G   55G   33G  63% /var

Test disk 7.x analysis shows:

TestDisk 7.0, Data Recovery Utility, April 2015
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org


Disk /dev/sda - 160 GB / 149 GiB - SAMSUNG HD160JJ
     CHS 19457 255 63 - sector size=512

>[ Analyse  ] Analyse current partition structure and search for lost partitions
 [ Advanced ] Filesystem Utils
 [ Geometry ] Change disk geometry
 [ Options  ] Modify options
 [ MBR Code ] Write TestDisk MBR code to first sector
 [ Delete   ] Delete all data in the partition table
 [ Quit     ] Return to disk selection





Note: Correct disk geometry is required for a successful recovery. 'Analyse'
process may give some warnings if it thinks the logical geometry is mismatched.