dead hard drive

well, one of my external hd's (in a removable enclosure) has bit the dust.  whenever i connect it to power, i just hear this awful scraping sound.

some questions:

1) any chance i could get any data off of it or should i give up

2) i think the fat table (it was fat32 formatted) is fucked - i can use linux dd to directly copy the sectors, right? if not, what should i use?

3) it's been defragged regularly, that puts all the data at the start of the volume, right?

4) once i try this, assuming i can, what should i do with the drive?

Can you still access the harddrive?

if you can, there is a free program on snapfiles.com
http://www.snapfiles.com/get/pcinspector.html

If you power up the hdd and then turn it around and that makes the sound differ, then it's probably done for, or it's going to be real soon.