I made a big mistake by unplugging the external harddrive (2TB, western digital) while it was still copying files. I just forgot it was copying files.
Now the hard disk won't respond. When I plug it in, the light is just blinking, but no mounted directory appears (I am using Mac OS).
Disk Utility does not help either... Repair does not work, nothing, even after rebooting the machine (I thought maybe the devices were still busy).
Is the hard disk really gone? I find it surprising that just unplugging it by mistake completely ruins the hard disk, instead of just trashing a few files that were being written.