Take off the metal encasing of the HDD in a dirty room hytecgowthaman?
That's instruction to destroy a HDD.
You are truly evil, nothing short of my expectation from a Mac user (I assume since you have a Mac logo)
Please don't open it if it's your HDD. Get Dell to help you or use professional HDD recovery service. If it's not yours, don't even touch it and FYI your IP address is recorded.