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?

"Awful scraping sound" implies major physical damage to the disk. It's extremely unlikely you'll get anything back from it without a professional data recovery agency.