How is data stored in hard disk?

Answer 1

To read, there are very small electric coils that sense the magnetic polarization; these coils are mounted on arms which pivot and move across and very close to the surface of the disk.

(see the image link under Sources... below)

These coils read the polarization which represents the 1's and 0's of the binary information stored on the magnetic disk.

The write mechanisms make use of the electricity flowing through a coil in the write head that produces a magnetic field. Electrical pulses are sent to the write head, with different patterns of positive and negative currents. The current in the coil of the write head induces a magnetic field across the gap between the head and the magnetic disk platter, which in turn magnetizes a small area on the recording medium.

The Read/Write head assembly works to read and write using basically the same technology, early units used the same hardware for both, modern units can have slightly different configurations of the microscopic gaps between coils and magnets etc. for optimum performance.

Answer 2

In hard disk, data is stored on both the surfaces of each disk except the upper surface of the top plate and the lower surface of the bottom plate. It means, a disk pack containing 10 disk plates will have 18 recording surfaces out of 20 surfaces available. In this way, data or information is stored in hard disk.

Answer 3

How data is written into and read from a hard disk depends on the specific type of hard disk. Magnetic disk hard discs use read/write heads and spinning discs while SSD hard disks use semiconductors.

Answer 4

In hard disk, information is stored on both the surfaces of each disk except the upper surface of the top plate and the lower surface of the bottom plate. It means, a disk containing 10 disk plates will have 18 recording surfaces out of 20 surfaces available. Each disk consists of a number of invisible concentric circles called tracks and each track is subdivided into sectors. In this way, data is stored in hard disk.

Answer 5

First of all, there is no difference between hard disk or a hard drive. It is actually called a hard disk drive or HDD. To answer your question, HDDs record data by magnetizing ferromagnetic material directionally, to represent either a 0 or a 1 binary digit. They read the data back by detecting the magnetization of the material.

Cite:

http://en.wikipedia.org/wiki/Hard_disk_drive

Answer 6

Data stored in a computer as bits & bytes (means 0s and 1s). All data which we entered will be stored in Hard disk of a computer.

Answer 7

How are bytes written onto a hard disk