KR19980019732A - High speed data transfer method - Google Patents

Abstract

end. FIELD OF THE INVENTION The present invention relates to a high speed data transfer method of a hard disk drive.

I. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for speeding up data processing and transmission speed by performing data read / write operations using all heads provided in a hard disk drive employing a multiple platter method.

All. Summary of the Invention Solution: Select all heads provided in the data write mode of a hard disk drive adopting the multiple platter method to write data transferred from an external device in a parallel processing method, and provide the data in the data read mode. It is characterized by transmitting the picked-up signal in parallel by switching all the heads.

la. Significant use of the invention: Can be used for data transfer of hard disk drives.

Description

High speed data transfer method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk drive, and more particularly, to a method for speeding up a data transfer rate transferred between a host computer and a disk.

A hard disk drive is widely used as an auxiliary memory device of a computer system that stores data transmitted from a host computer in a magnetic form on a disk, which is a recording medium, and reads the corresponding data when the data read command is received and transmits the data to the host computer. The main functions of the hard disk drive can be roughly divided into the data write operation and the read operation as described above, and the data read operation has a significant meaning in that the user writes out the data written on the disk after a certain period of time. I would say. Hereinafter, referring to FIG. 1 showing the configuration of a hard disk drive, the operation of each component during data read / write will be described.

1 shows a block diagram of a general hard disk drive, and shows an example of a hard disk drive having two disks 2 and four heads 4 corresponding thereto. Referring to Fig. 1, the disks 2 are typically mounted in a stack form and rotated on the drive shaft of the spindle motor 26, with each disk surface corresponding to one head 4. As shown in Figs. The head 4 is located on the surface of the disk 2 and is mounted to a vertically extending arm 6 of the arm assembly of a rotary voice coil motor (VCM) 20. The preamplifier 8 preamplifies the signal picked up by one of the heads 4 during data read and applies the analog read signal to the read / write channel circuit 10. During data writing, encoded write data applied from the read / write channel circuit 10 is driven to drive one of the heads 4 corresponding to the write data on the disc 2. At this time, the preamplifier 8 selects one of the heads 4 under the control of a disk data controller (DDC) 28. The read / write channel circuit 10 decodes the read signal path applied from the preamplifier 8 to generate read data RDATA, and encodes the write data WDATA applied from the DDC 28 to the preamplifier 8. . The read / write channel circuit 10 also demodulates the head position information which is a part of the servo information written on the disc 2 to generate a position error signal (PES). The PES generated from the read / write channel circuit 10 is applied to the A / D converter 12, and the A / D converter 12 converts the applied PES into a digital step value corresponding to its level so as to provide a microcontroller ( 14) to provide. The DDC 28 writes data received from the host computer onto the disc 2 via the read / write channel circuit 10 and the preamplifier 8 or transmits data read from the disc 2 to the host computer. . The DDC 28 also interfaces the communication between the host computer and the microcontroller 14.

The microcontroller 14, on the other hand, controls the DDC 28 in response to data read / write commands received from the host computer and controls track search and track following. At this time, the micro controller 14 controls the track tracking by using the PES value input from the A / D converter 12 and responds to various servo control signals output from a gate array (not shown). Perform control. The D / A converter 16 converts a control value for position control of the heads 4 generated from the microcontroller 14 into an analog signal and outputs the analog signal. The VCM driver 18 generates a current I (t) for driving the actuator by a signal applied from the D / A converter 16 and applies it to the VCM 20. The VCM 20 located on the other side of the actuator having the heads 4 attached to one side of the VCM 20 horizontally moves the heads 4 on the disk 2 corresponding to the direction and the level of the current input from the VCM driver 18. Move it. The motor controller 22 controls the spindle motor driver 24 according to a control value for rotation control of the disks 2 generated from the microcontroller 14. The spindle motor driver 24 drives the spindle motor 26 to rotate the disks 2 under the control of the motor controller 22. The buffer memory 30 connected to the DDC 28 temporarily stores data transferred between the disk 2 and the host computer under the control of the DDC 28.

In the conventional hard disk drive having the above-described configuration, one head 4 is switched during a data read / write operation to read or write predetermined data from the surface of the disk 2 corresponding to the switched head 4. . That is, data transmitted from the host computer is input to the read / write channel circuit 10 through the DDC 28. The read / write channel circuit 10 converts the data into a preamplifier 8 so that the input data is sequentially input to the preamplifier 8 and the switched head 4. The write data transmitted from the host computer is then written onto the disc 2 via the preamplifier 8 and the head 4. In general, in order to increase the data processing speed of the head 4, the period of the signal applied to the head 4 should be shortened (that is, high frequency) or the number of rotations of the disk 2 should be increased. However, when increasing the frequency applied to the head 4 in order to increase the data processing speed or data transfer speed, there is a limit in the frequency increase due to the resonance phenomenon caused by the inductance of the head 4 and the capacitance. When the number of rotations of the coil wound around the core of the head 4 is decreased to increase the resonance frequency of the head 4, there is a problem in that the output of the head 4 is lowered. That is, in the conventional hard disk drive, there is a problem in that the data transfer speed cannot be increased because the transfer of data picked up from the head 4 is sequential.

Accordingly, an object of the present invention is to provide a method for speeding up data processing and transmission speed by performing data read / write operations using all heads provided in a hard disk drive employing a multiple platter method.

1 is a block diagram of a typical hard disk drive.

2 is a diagram illustrating a connection between a preamplifier and a head for explaining a data transmission process according to an exemplary embodiment of the present invention.

Hereinafter, an operation according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description and drawings many specific details, such as head number and data rate, are shown to provide a more general understanding of the invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

2 illustrates a connection state of the preamplifier 8 and the head 4 for explaining a data transmission process according to an embodiment of the present invention. Referring to Fig. 2, the preamplifier 8 outputs terminals WDI0, WDI1, WDI2, WDI3 for inputting data transmitted from the read / write channel circuit 10, and signals picked up from the heads 0-3. Terminals RDX and RDY are provided to allow data to be transmitted in a data read / write operation to be processed in a parallel manner. When the write data are first transmitted from the read / write channel circuit 10 to the input terminals WDI0 to WDI3 of the preamplifier 8 in parallel, the transmitted write data is transmitted to the respective input terminals WDI0 to WDI3. The write data flip flops (hereinafter referred to as WDFFs) 32 to 38 and the write drivers 40, 42, 44, and 46 connected to each other are applied to the heads 0 to 3, respectively. At this time, each of the write drivers 40, 42, 44, and 46 may write the write data input from the WDFF 32 to 38 according to the logic state of the enable signal input by the control of the microcontroller 14. It applies to -3. That is, the data processing speed can be improved by writing the write data onto the disc 2 using all four heads. If the data transfer rate of a hard disk drive having four heads 4 is at most 100 Mbps, the conventional hard disk drive of the sequential processing method can exhibit a data transfer rate of 100 Mbps. However, as described above, when data is written in a parallel processing manner using all four heads, data can be processed in parallel in each head, thereby achieving a transmission speed of 400 Mbps. Meanwhile, the data read operation according to an embodiment of the present invention also improves the data transfer rate by transmitting signals picked up from four heads to the read / write channel circuit 10 through the preamplifier 8 in parallel processing. Can be.

As described above, the present invention writes data transmitted from the host computer using all the heads of the hard disk drive employing the multiple platter method, and transmits the signal picked up through the head in parallel processing. This has the advantage of speeding up.

Claims (1)

In a hard disk drive employing a multiple platter method, Selecting all heads provided in the data write mode and writing data transmitted from an external device in parallel processing; A high speed data transmission method comprising the steps of switching all the heads provided in the data read mode and transmitting the picked-up signals in parallel processing.