My hard disk which under Windows 7 was separated into 2 partitions: C (system part) and D. I keep my movies, music and files on D and use C for installed programs. When I installed Ubuntu 16.04, I selected free space partition as Linux's system directory. After installation however, the D partition completely disappeared. I can still see my C, but D is not visible on Windows and Linux. In Windows' disk manager, it is showing some 293 GB unallocated space, while on Linux it shows as a Linux filesystem. I am very much worried about my data which was on D. I want my data back. I can't understand what's going on and will be really thankful for any replies.
Here's a screenshot if it helps somehow:
sudo lsblk -f
? – David Foerster Jun 28 '16 at 11:14