Shulou(Shulou.com)06/02 Report--

Platter: a disk has several disks, each with two upper and lower surfaces that can store data. These surfaces are stacked on the spindle (spindle)

Rotate at high speed, and they are numbered from top to bottom, starting with "0".

Read-write head (read/write head): there is a read-write head on each disk, and the disk number is the number of the disk. All magnetic heads are under the action of head arm (arms)

Move inside and outside at the same time, that is, at any time, the track number of all heads is the same.

Track (track): each disk is divided into a number of concentric circles. These concentric circles are called tracks, which are numbered sequentially from the outside to the inside, starting with 0.

Sector: divide a disk into sectors with the same interior angles, so that each track on the disk is divided into several arcs, each of which is called

Make a sector. The data in each sector is read or written as a unit at the same time. The first sector of a hard disk is called the boot sector. The sector is the smallest component of the hard disk.

Yuan, the maximum number of sectors on the track is 63.

Cylinder (cylinder): the same track on all disks forms a cylinder, called a cylinder. The data is read and written from the outside to the inside by the cylinder, not by the disk.

Proceed. When positioning, first determine the cylinder, determine the disk surface, and then determine the sector. After that, all the heads are positioned together to the specified cylinder, and then the disk is rotated to make the specified sector.

Under the magnetic head. When writing data, after the current track of the current cylinder is full, it begins to write on the next track of the current cylinder, only after the current cylinder is fully written.

Can move the head to the next cylinder. When partitioning the hard disk, each partition is also divided by cylinder, that is, from what cylinder to what cylinder, there is no one.

The cylinder belongs to multiple zones.

The maximum number of cylinders is 1023, which is the smallest unit of disk partition.

CHS:Cylinder (Cylindrical), Head (head), Sector (sector) of hard disk

As long as you know the CHS of the hard disk, you can determine the capacity of the hard disk:

Hard disk capacity = number of cylinders × number of heads x number of sectors per track x capacity of single sector (512)

Summary:

1. The hard disk has several disks, each with two sides and each side with a magnetic head

two。 The disk is divided into a plurality of sector-shaped areas, namely sectors.

3. The concentric circle with different radius of the same disk is the track.

4. The cylindrical surface formed by different plates with the same radius is the cylindrical surface.

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