My hard drive with GPT format was overwritten by accident. I ran dd over it when I tried to write an .iso to an USB memory.
$ dd if=Ubuntu.iso of=/dev/sda
Then I tried to fix my partition table with a Linux live and gdisk but didn't work. I ran:
$ gdisk
r # recover and transformation option
b # use backup GPT header
c # load backup partition from disk
w # write table to disk and exit
Now I can't mount any filesystem. When I run mount /dev/sda6 /mnt I get:
Mount: /dev/sda6 is already mounted or /mnt busy
I'd like at least mount the filesystem to save my data to a backup.
