is my external hard drive dead?

one day my external hard drive just stopped showing up in my my computer page, it still shows up in the device manager page, but a lot of functions like roll back driver, update driver, that kind of stuff are greyed out, when i right click the my computer icon and go to manage, the hard drive shows up (sometimes) but it doesnt initialize, the hard drive makes sounds of winding up 3 times, and then it goes silent.this is all the diag i get from when i use it on my windows machine (its formatted in ntfs), when i plug it into a mac, it simply says that the drive cannot be read. please help! its a Fantom Greendrive 1TB, it has a 2 year warranty, and i bought it back in 2009.