Technology of hard disk drive
There are 4 types of technology is here. there is given blow
- Magnetic recording
- Components
- Error rates and handling
- Future developement
Magnetic recording:
A hard disk dirves recording the data by a magnetizing a thin ferromagnetic film. sequencial changes in magnetization direction representing a 0's and 1's data. The typical hard disk drives designing consist of a spindle that holds flat circular disk. and also called as the platters. which is record the data. The contemporary platters hard disk drive is spun at varying the speed 4200 rpm n the energy efficient of portable device.
Components
The typical hard disk drives has electric motors two to spindle motor that spins the disk. the motor disk has rotor external attached to the disks. The voice coil itself is shaped rather like arrow head and made of doubly coated copper wire of magnet.
Error rates and handling:
Modern drives make extensive use of error correction codes.There techniques store extra bit is determined by a mathematical formula. The worst type of errors are those that go unnoticed and are even detected by the disk firmware.
Future development
the incresing areal density corresponds to an ever decreasing bit cell size. The super paramagnetic trilemma involving grain size.
