Is my WD20EARX dead

I got a the 2tb wd caviar green hdd about 2months ago. Today when I was extracting something with winrar I got some error message and had to close winrar. When I checked my computer the 2t hdd was gone but my other 2 drives were still there and when I reset my pc it wouldn’t boot. It said please insert boot disk. If I unplug it windows will boot with the other 2 drives but it won’t boot if I plug it in and it won’t show up in bios either. Windows is installed on another drive I am just using it for storage. Is my drive dead?

Try using DLG to run a test.