How to get data from crashed hard disk if it is not recognized

[RamxLoves]

my dell WD hard disk is crashed recently... but my data of 150gb is still in it... but it is not recognising on other system... now i sincerely want my data back..... plzzzzzzzzzzzzzzzzzzz help me how can i get my data back???????????

 

[velani]

I would be very interested in someones reply as I have 2 dead drives also that are not recognised i any computer, external drop in readers etc.

 

[BwwwJ1st]

Is the HDD showing up in the BIOS? When the PC is on and faulty HDD hooked up, can you feel, hear it vibrate? Do you think the failure is mechanical or electronic?