Posted 07 June 2012 - 03:55 PM
Sounds like a head to platter collision. The most notorious cause of hard-disk failure is a head crash, where the internal read-and-write head of the device, usually just hovering above the surface, touches a platter, ( probably happened when it was droped) or scratches the magnetic data-storage surface. A head crash usually incurs severe data loss, and data recovery attempts may cause further damage if not done by a specialist with proper equipment. Hard-drive platters are coated with an extremely thin layer of non-electrostatic lubricant, so that the read-and-write head will simply glance off the surface of the platter should a collision occur. However, this head hovers mere nanometers from the platter's surface which makes a collision an acknowledged risk. my advice is to send it off to get the data recovered but be prepaired to pay a hefty bill.
Larry D. Lawrence II
MCSE, MCP,ACMT, ACTC
Dell, HP, Toshiba, Apple, Lenovo, and IBM Certified Technician