TestDisk

TestDisk
CGSecurity - Data recovery: TestDisk & PhotoRec - http://www.cgsecurity.org/

TestDisk - CGSecurity - http://www.cgsecurity.org/wiki/TestDisk

TestDisk vs PhotoRec
TestDisk - If you have lost partition or strange problem with your hard disk partitions, run TestDisk to recover your data.

PhotoRec - To recover your lost digital pictures or lost files, try PhotoRec.

PhotoRec
See PhotoRec

Linux
wget http://www.cgsecurity.org/testdisk-6.14.linux26.tar.bz2 tar -jvxf testdisk-6.14.linux26.tar.bz2 cd testdisk-6.14

./photorec_static diskimage.dd ./photorec_static -d outputdir/ diskimage.dd