COMPUTER FUNDAMENTALS

Detailed explanation-1: -A head crash is a hard-disk failure that occurs when a read–write head of a hard disk drive makes contact with its rotating platter, slashing its surface and permanently damaging its magnetic media .

Detailed explanation-2: -Most problems occur when the read/write head (looks like a pointer in the photo) damages the metal disk by hitting or even just touching it. This is called a head crash. When the computer is on, the hard disk is spinning extremely fast. Any contact at all can cause pits or scratches.

Detailed explanation-3: -A disk read-and-write head is the small part of a disk drive which moves above the disk platter and transforms the platter’s magnetic field into electrical current (reads the disk) or, vice versa, transforms electrical current into magnetic field (writes the disk).

Detailed explanation-4: -After a head crash, particles from the damaged platter and head media can cause one or more bad sectors. These, in addition to platter damage, will quickly render a drive useless. A drive also includes controller electronics, which occasionally fail.