JP2605394B2 - High-speed data transfer magnetic disk unit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive, and more particularly, to a high-speed data transfer magnetic disk drive designed to increase the read / write data transfer speed of a magnetic disk drive.

2. Description of the Related Art Generally, a commercially available magnetic disk drive is configured such that several disks having two track surfaces are rotated in a comb-like manner and accessed from these disks. Conventionally, in such a magnetic disk device, 1 Byte (8
bit) width data parallel to the data surface of one track (8bi
t) → serial (1 bit) conversion or serial → parallel conversion to perform read / write operation.

[Problems to be Solved by the Invention] However, the above-described conventional magnetic disk drive is 1 Byt
Data surface (magnetic surface) of one track of e (8bit) width data
The read / write operation is performed with serial data, that is, 1-byte (8-bit) wide data is
It converts to 8 bits and writes, and converts 8 bits of serial data to 1 byte of parallel data and reads. Therefore, the read / write operation speed to the magnetic surface is 1/8 of the data transfer speed. There is a disadvantage that the speed is slow.

[Means for Solving the Problems] The technical means of the present invention for solving such a problem includes a 10-track magnetic surface including an 8-track data surface, a 1-track parity surface, and a 1-track servo surface. , Read / write head assembly for reading / writing the magnetic surface of 10 tracks, and 9 for the data surface and parity surface connected to the read / write head assembly.
Track read / write amplifier and read / write
A one-track servo amplifier for a servo surface connected to the head assembly, a nine-track read / write control connected to a nine-track read / write amplifier, and a one-track servo control connected to a one-track servo amplifier And a main control unit for controlling these components, and is a high-speed data transfer magnetic disk device which simultaneously reads or writes the magnetic surfaces of the 8-track data surface and the 1-track parity surface.

Embodiment Next, a high-speed data transfer magnetic disk drive according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a high-speed data transfer magnetic disk drive according to one embodiment of the present invention. This magnetic disk drive has 2
It has five disks having track surfaces, and these track surfaces are composed of a magnetic surface including an 8-track data surface, a 1-track parity surface 2, and a 1-track servo surface 3. The disk having this magnetic surface is driven to rotate by the synchronous motor 6. Further, a head assembly 4 having a data / parity / servo head 7 for reading / writing the magnetic surface of these 10 tracks is provided, and a servo mechanism 5 for performing a seek operation of the head assembly 4 is provided. I have. Further, the magnetic disk drive is connected to the 9-track read / write amplifiers 8, 9 for the data and parity planes connected to the read / write head assembly 4, and to the read / write head assembly 4. 1-track servo amplifier 10 for servo surface and 9-track read / write control 11,1 connected to 9-track read / write amplifiers 8,9
2, a one-track servo control 13 connected to the one-track servo amplifier 10, and a main control unit 14 for controlling these components. The one-track servo control 13 drives and controls the servo mechanism 5.

FIG. 2 is a structural view showing a mechanism portion of the embodiment, and FIG.
A disk having a track data surface 1, a one-track parity surface 2, and a one-track servo surface 3 is combed and rotated by a synchronous motor 6. The 10-track head assembly 4 is driven by a servo mechanism 5 so that each head 7 accesses each disk surface.

Next, an example of the read / write operation will be described with reference to the drawings. First, in the write operation, a write address and write data are transmitted from the point A outside the main control unit 14 to the main control unit 14 with a 1-byte width. As a result, the main control unit 14 passes the write address to the one-track servo control 13, and the servo control 13 passes the data read from the servo head 7 to the servo control 13 via the servo amplifier 10 and the current position of the current position. The magnetic surface address is compared with the write address. Further, the servo mechanism 5 is instructed to the write address, and the head assembly 4 is positioned to the write address. Next, the main control unit 14 transmits 1 Byte (8 bi
t) Width write data is 9 track write control 12
The write control 12 adds parity data (1 bit) to the 1-byte (8-bit) width data, and writes 1-byte (8-bit) data and 1-bit parity data to the magnetic surface via the 9-track write amplifier 9.

On the other hand, in the read operation, the read address is transmitted from the point A to the main control unit 14. As a result, the main control unit 14
Passes the read address to the 1 track control 13,
The magnetic surface address of the current position is read from the servo head 7 and passed to the servo control 13 via the one-track servo amplifier 10. The servo control 13 compares the read address with the magnetic surface address, and the servo mechanism 5 reaches the read address. To instruct. As a result, the head assembly 4 is positioned at the position of the read address. In the head assembly 4, the 8-track data surface and the 1-track parity surface are read from the data / parity head 7, and the data is read through the 9-track read amplifier 8. Hand over to track read control 11. Read control 11 performs parity check to make sure that it is correct 1-byte data,
After that, the data is passed to the main control unit 14, and the main control unit 14 transmits the read data to the point A.

Therefore, the high-speed data transfer magnetic disk device according to the embodiment performs the read / write operation of 1-byte (8-bit) width data and parity (1 bit) data simultaneously on the 8-track data surface and the 1-track parity surface. Read / write is performed at a data transfer rate eight times that of the device. Also, read / write on magnetic surface with 1 byte width data.
Since the write operation is performed, the serial-to-parallel conversion circuit, the parallel-to-serial conversion circuit, the head select circuit, and the like that are included in the conventional magnetic disk device are not required.

[Effects of the Invention] As described above, according to the present invention, 1-byte (8-bit) width data and parity (1-bit) data are stored in an 8-track data surface and 1
Since the read / write operation is performed simultaneously on the track parity plane, the data transfer speed is eight times as high as that of the conventional read / write operation in units of 1 bit as in the magnetic disk device, and the speed can be increased. effective.

In addition, since the read / write operation is performed with 1-byte (8-bit) width parallel data, a serial-to-parallel conversion circuit, a parallel-to-serial conversion circuit, and a head select function as in a conventional magnetic disk device are not required. There is an effect that control can be simplified and device cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a high-speed data transfer magnetic disk drive according to an embodiment of the present invention, and FIG. 2 is a structural diagram thereof. 1: 8 track data surface 2: 1 track parity surface 3: 1 track servo surface 4:10 track head assembly 5: servo mechanism 6: synchronous motor 7: head 8: 9 track read amplifier 9: 9 track write amplifier 10 : 1 track servo control 11: 9 track read control 12: 9 track write control 13: 1 track servo control 14: main controller

Claims (1)

(57) [Claims] 1. A 10-track magnetic surface including an 8-track data surface, a 1-track parity surface, and a 1-track servo surface.
A read / write head assembly for reading / writing a 10-track magnetic surface; a 9-track read / write amplifier for the data surface and parity surface connected to the read / write head assembly;
1 track servo amplifier for servo surface connected to write head assembly, 9 track read / write control connected to 9 track read / write amplifier, and 1 track servo connected to 1 track servo amplifier Control unit and a main control unit for controlling these components.
A high-speed data transfer magnetic disk drive wherein a magnetic surface with a track parity surface is read or written simultaneously.