Hi,
I've an Barracuda 7200.10 here which has been dropped while operating. The noise is obviously a platter and head damage related symptom. As the customer does not want to pay more than a new HDD would cost (ha ha!), I looked at the serial console and it gave me

Reset
4096k x 16 DRAM
GALAXY - 1_Disk S-6D 09-22-06_15:48

Buzz HM SFI
!
(P)SATA Reset
(H)SATA Reset
$HM HM HM HM HM HM HM

What's that? Is the HDD thinking ("Hmmm.."), or are the Heads Missing?
Ok, I know that it means head mask, and the $ also has a meaning I once used to know... servo info missing? Anyway, nothing that can be fixed for 50 bucks. Some customers are strange.

looks like a MHA problem, u could be tried a head test on Factorial Mode, after load adaptives modules,and system sectors to check if head 0 its working

Best Regards

But if u has a damaged on platter, "head crash", maybe its a black dust over the platter´s , if its that, send to the garbage that hdd

It is already dumped. As I wrote, the customers understanding of data recovery is repairing a hdd, which should not cost more than a new one.