JPS6362057A - Disk memory device - Google Patents

Abstract

PURPOSE:To omit the waiting time for positioning and rotation with a disk memory device by providing a memory part to store the information written or to be written into a disk. CONSTITUTION:When data are ready to be read or written after a medium 1 is loaded into a disk drive 2, a data branch control part 3 transfers the data on the medium 1 to the corresponding address of a memory part 4 which is previously decided. The transfer of data is carried out continuously until the data on the medium 1 are all transferred to the memory 4. When a data write or read request is produced to the medium 1 from a host device 7 during a data processing mode, the data transfer is interrupted and data are written to or read out of the medium 1 in accordance with the request of the device 7. The write data is stored temporarily in a disk control write control part 5 and then written to the part 4. When the data transfer is through, the data are written to and read out of the device 7 via the part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device which is an external storage device for an information processing device, and more particularly to a magnetic disk device in which the storage medium can be exchanged in 100%.

[Conventional technology]

Conventionally, an example of a storage device with an exchangeable storage medium is a floppy disk device, but since this type of device realizes writing and reading of information to and from the storage medium, K is for moving and positioning the magnetic head. time and waiting time for the disk plate to rotate.

[Problem that the invention seeks to solve]

As mentioned above, for example, the conventional 70 disk drive requires time to move and position the magnetic head and wait for the disk plate to rotate in order to read and write information. When executing a process that requires a large number of inputs and outputs of information to and from a floppy disk device, there is a drawback that the efficiency of the process is extremely reduced due to the presence of waiting time.

[Means for solving problems]

The disk storage device of the present invention uses a disk plate as an information recording medium and includes a head that performs mechanical movement as a means for taking out or writing information from the disk plate. a memory section for storing information to be written or information to be written; a disk write control section for storing information on an address at which the information should be stored; and a data branch control section for controlling.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

The drawing is a block diagram showing an embodiment of the present invention applied to a floppy disk device.

When the medium 1 is installed in the disk drive unit 2 and data can be written to and read from the medium 1,
The data branch control unit 3 starts transferring the data recorded on the medium 1 to predetermined n corresponding addresses in the memory unit 4.

Before all data on medium 1 is transferred, host device 7
When a request to write data to or read data from the medium 1 is generated, the data transfer is interrupted, and writing to or reading from the medium 1 is executed in accordance with the request from the host device 7. If there is writing on the medium 1 at this time, information on the written record is stored in the disk write control section 5.

When the work requested by the host device 7 is completed, the interrupted data transfer from the medium 1 to the memory unit 4 is continued. After all the data on the medium 1 has been transferred to the memory section 4, if the information of the record in which the medium 1 has been written is stored in the disk write control section 5, the data from the medium 1 to the memory section 4 can be transferred from the medium 1 to the memory section 4 based on the record information. Data transfer takes place. When this work is completed, the corresponding record information is deleted. If all the record information stored in the disk write control section 5 is erased, the data on the medium 1 and the data on the memory section 4 will have the same content. In this state, when a request to read data from the medium 1 is issued from the host device 7, the data is read from the corresponding address in the memory section 4 and sent to the host device 7. At this time, medium 1 is not accessed.

Next, when a request to write data to the medium 1 is issued from the host device 7, the data sent from the host device 7 is written to the address corresponding to the medium 1 in the memory section 4, and at the same time a record containing that data is omitted. The information is stored in the disk write control unit 5. When the data writing operation from the host device 7 to the memory section 4 is completed, the data is transferred from the memory section 4 to the medium l according to the record information stored in the disk write control section 5.

As described above, after installing the medium 1, from the medium 1 to the memory section 4
After a certain period of time for data transfer to the medium 1, writing and reading data from the host device 7 to the floppy disk device 8 is performed in the memory section 4, and data is always written directly to the medium 1. Compared to the conventional technology in which reading is performed, the time required for the floppy disk drive 8 of the host device 7 is shortened by eliminating the time for moving and positioning the magnetic head and the rotation waiting time for the medium 1.

〔Effect of the invention〕

As is clear from the above description, the present invention has the effect of freeing the host device from most of the time required to move, position, and wait for rotation of the magnetic head, which were disadvantages of conventional magnetic disk devices. .

[Brief explanation of drawings]

Claims (1)

[Claims] In a disk storage device that uses a disk plate as an information recording medium and includes a head that performs mechanical movement to take out or write information from the disk plate, information that is written or to be written on the disk plate is A disk write control section that stores information on an address at which the information is to be stored; and a data branch control section that controls writing or reading of information to or from the memory section or the disk board. A disk storage device characterized by: