CN1393850A

CN1393850A - Method for increasing R/W speed of hard disc in computer

Info

Publication number: CN1393850A
Application number: CN 01115079
Authority: CN
Inventors: 徐国华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-25
Filing date: 2001-06-25
Publication date: 2003-01-29

Abstract

The invention discloses the method for increasing the speed of reading and writing computer hard disk. Al lthe magnetic heads driven by the track seeking mechanism reads and writes the all sectors on the cylinder synchronously. With the reading/writing sectors on the cylinder being completed, all the magentic heads are switched to another cylinder. The working mode of the magnetic head is as follows: internal transmission rate=linear densityXlinear velocityXnumber of the magnetic heads n. When the hard disk is in work, the data on the hard disk are decomposed into data blocks, bytes, and even serial single bit, which is transmitted to each head after being allocated alternately and synchronous buffered. Each magnetic head works in parallel working mode instead os serial mode so as to increase working efficiency and the internal transmission rate.

Description

A kind of method that improves R/W speed of hard disc in computer

The present invention relates to a kind of improvement technology of computer hardware, specifically a kind of method that improves R/W speed of hard disc in computer.

Along with the significantly raising of computing machine overall performance, storage subsystem has become the bottleneck of system, and especially along with the fast development of high-speed interface technology, the development of seagate has lagged significantly behind other devices.Because the lifting of main flow hard disk transmission performance at present mainly is to realize by improving disk running speed and recording density.But the raising of disk running speed and record density is owing to be subjected to the restriction of the physical construction and the physical characteristics of hard disk, the lifting of transfer rate is limited, when the working method of the existing hard disk that only changes could break through above-mentioned restriction and obtain the raising by a relatively large margin of read or write speed.

As everybody knows, the structure of hard disk partly is made up of disk sheet, spindle motor, tracking motor, read-write head assembly, control circuit, read/write circuit, interface circuit etc.A plurality of rigid magnetic disks sheets are arranged in the sealing metal chamber of hard disk, they all are arranged on the main shaft, drive high speed rotating together by spindle motor, in a plurality of disk sheets are corresponding a plurality of read-write heads are arranged also, they do unified moving along the surface of disk under tracking motor and magnetic-head positioning construction drive.Read-write head floats on the disk face by the head gimbal technology during work, can read and write the data that write down on the disk but does not contact with disk face.Dividing on disk face has magnetic track and sector, and the identical place of radius has magnetic track to be on the same cylinder on each disk sheet, " cylinder " of Here it is disk sheet.

The read-write process of existing hard disk is that seek mechanism moves on to head stack on the position that will read and write, magnetic track on the disk face is read and write, during read-write, by carrying out in proper order with the different disk face on the cylinder, choose different magnetic heads by electronic switch, Du Xie address is three-dimensional " cylinder/magnetic head/sector " like this.After the reading and writing data of the track recording on the disk face was intact, the order of just pressing magnetic track to the adjacent track of same cylinder, had only the data recording of back to write fully when this cylinder and just changes cylinder after full.The reality of work of hard disk is that each data write has only a magnetic head in work like this, other magnetic head is all being waited for read-write control signal, hard disk is after startup, each magnetic head is all in running order, but have only a magnetic head carrying out read-write operation, and other magnetic head is in waiting status, and this just makes the work efficiency of whole head stack very low.That is to say and in minimum working time unit, have only the data of a magnetic head at read-write 1bit.Be formulated as: internal transmission speed=line density * linear velocity.

The purpose of work of the present invention is head stack to be moved on on the position that will read and write by seek mechanism, during read-write, data after distributing are sent on each magnetic head by read/write circuit, all magnetic heads with cylinder carry out reading and writing data to the magnetic track of corresponding disk simultaneously, have only after finishing with all sector read-writes of cylinder and just change cylinder, recording address is " cylinder/sector " of two dimension.Because the magnetic head that the data decomposition relief is all is worked, in the minimum working time, just can read and write n bit data of n magnetic head like this.Be formulated as: Internal Transfer Rate=line density * linear velocity * magnetic head is counted n.

Method of the present invention is under the mechanical aspects that does not change hard disk, only changes the mode of operation of head stack.During work, the data decomposition that will store is become data block, byte, even resolve into single position.Be sent on each magnetic head after the alternate allocation simultaneously, allow all magnetic heads carry out data write work simultaneously, change in the original magnetic head group that the work in series mode is the concurrent working mode between each magnetic head, thereby improve the task performance of magnetic head group greatly, make the Internal Transfer Rate of hard disk significantly improve.

Embodiment:

The structure of present technique is the same substantially with existing hard disk, also partly is made up of disk sheet, spindle motor, tracking motor, head stack, control circuit, interface circuit and shell etc.The course of work is: spindle motor starts drive disc group and rotates into duty, and the tracking motor moves on to head stack on the position that will read and write the magnetic track on the card is read and write.

Ablation process: to sending into high-speed cache through the data that interface imports into from computing machine, send into after control gate carries out Control Allocation to data in the buffering SYN register, the data after are synchronously sent into each magnetic head simultaneously after modulating-coding amplifies write coil carries out the magnetization that writes of data to be operated.

Readout: each magnetic head induces the magnetization polarity of relevant position simultaneously when magnetic head process magnetized area, send into the buffering SYN register through the data of amplifying the demodulation generation, behind the synchro control generated data, send into jamming in computer CPU by the cache interface circuit.

Can also increase a disc and be used for depositing ECC synchronous correction data, strengthen the fault-tolerant ability of data, improve the reliability of data, thereby improve the overall performance of hard disk.

The characteristics of technology of the present invention are: read and write simultaneously behaviour with all magnetic heads of cylinder when read-write Do, only have after finishing with whole sectors read-write of cylinder and just change cylinder. Recording address is two-dimentional " post Face/sector ". Owing to when work, data decomposition is become data block, byte even single position, alternate allocation After cushioning synchronously, be sent to simultaneously on each magnetic head, allow all magnetic heads sentence simultaneously in the reading writing working, become former Coming the work in series mode between interior each magnetic head of magnetic head group is the concurrent working mode, thereby has greatly improved whole The task performance of individual magnetic head group, also so that the Internal Transfer Rate of hard disk increase exponentially.

Claims

1. method that improves R/W speed of hard disc in computer, all magnetic heads of tracking drive mechanism that it is characterized in that being provided with in the hard disk carry out concurrent reading and concurrent writing to the sector on the same cylinder simultaneously, have only after finishing with all the sector read-writes on the cylinder, all magnetic heads are changed cylinder simultaneously, promptly allow all magnetic heads participate in reading writing working simultaneously, allow n magnetic head read and write n bit number in the working time of minimum, the transfer rate expression formula is: Internal Transfer Rate=line density * linear velocity * magnetic head is counted n.

2. method according to claim 1, it is characterized in that hard disk becomes data block with data decomposition when work, byte even single position, alternate allocation is sent on each magnetic head after cushioning synchronously simultaneously, allow all magnetic heads sentence in the reading writing working simultaneously, the work in series mode that becomes between interior each magnetic head of original magnetic head group is the concurrent working mode, thereby has improved the task performance of whole magnetic head group greatly, also makes the Internal Transfer Rate of hard disk increase exponentially.