JPS62187927A - Optical disk storing device - Google Patents

Abstract

PURPOSE:To speed up reading by connecting a memory for storing data for the share of one track to a reading circuit. CONSTITUTION:When a high-order device 1 outputs a reading instruction to an optical disk storing device 2, data for one track including a sector specified by an optical head 6 are read out from an optical disk storing medium 5 through a reading circuit 7 and stored in a memory 8. When the specified sector is not a defective sector, the data of the specified sector are sent to the high- order device 1 as they are. If the specified sector is a defective sector, data of a substitutive sector corresponding to the defective sector are transferred to the high-order device from the memory 8 storing the data for the share of one track of the substitutive sector.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disk storage device, and particularly to a source disk storage device with an improved data access method.

[Conventional technology]

In conventional original disk storage devices, if there is a defective area due to scratches or the like in the sector in which data was to be saved on the optical disk storage medium, the data is stored as a backup on the same track. It uses a method of writing to sectors.

In an optical disk storage device using such a method,
When reading data in an alternative sector, since there is only memory for one safeter, the primary safe sector (a sector that is not an alternative sector) is first read, and if that sector is defective, the corresponding alternative is read. I needed to read the sector again.

[Problem that the invention seeks to solve]

For this reason, when the above-mentioned conventional optical disk storage device reads data in an alternative sector, it first reads the primary sector and determines that it is a defective sector, since it only has memory for 1 sefter. It is necessary to read another sector in the same track,
If the process is not completed within the time it takes for the optical disk storage medium to rotate from the defective sector to its replacement sector, it will be necessary to wait for one more rotation, resulting in a time-consuming problem.

[Means for solving problems]

The original disk storage device of the present invention includes an optical head that reads data written on an optical disk storage medium, a follow-up circuit that converts the signal read by the optical head into a data format that can be read by a host device, and the reading circuit. It is configured to include a connected memory capable of storing one track worth of data on the original disk storage medium, and an interface circuit connected to the continuation circuit and converting the signal level with the host device.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a data processing system that includes one embodiment of the present invention.

The data processing system shown in FIG. 1 includes a host device 1 and a source disk storage device 2. The data processing system shown in FIG.

The host device 1fi1.1 is connected to the original disk storage device 2 and inputs and outputs data.

The original disk storage device [2 includes an interface circuit 3, a write circuit 4, an original disk storage medium 5, an original head 6,
It is configured to include a readout circuit 3, a memory 8, and a control section 9.

The interface circuit 3 is a circuit connected to the host device 1 and converts input/output signals.

The write circuit 4 receives the output signal from the interface circuit 3 and outputs a signal for writing data to the original disk storage medium 5 to the optical head 6.

The original head 6 reads data from the optical disk storage medium 5 and supplies it to the subsequent output circuit 7 .

A memory 8 capable of storing a data capacity of 122 times is connected to the output circuit 7, and the data in the sector designated by the higher-level device I is sent to the higher-level device IK via the output circuit w17 and the interface circuit 3.

The control section 9 is a circuit that controls the entire optical disk storage device 2, and is connected to each block.

Next, the operation of the data processing system shown in FIG. 1 will be explained.

When the host device tl issues a read command to the optical disk storage device fM2, data for one track including the sector designated by the optical head 6 from the optical disk storage medium 5 is stored in the memory 8 through the succession circuit 7. If the designated sector is not a defective sector, the data of the designated sector is directly sent to the host device 1lil. However, if the designated sector is a defective sector, the data of the substitute sector corresponding to the defective sector is transferred from the memory 8 in which 22 worth of data is stored to the host device. .

The embodiments described above are merely examples, and the present invention is not limited by the type of optical disk storage medium used here, such as write-once type or rewritable type.

〔Effect of the invention〕

The optical disk storage device of the present invention connects a memory capable of storing data for one track to the readout circuit.
When reading data in an alternative sector, the optical disk storage medium only needs to be accessed once, and data in an alternative sector corresponding to a defective sector can be read out at high speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a data processing system that includes one embodiment of the present invention. l...Upper device, 2...Original disk storage device, 3...Interface circuit, 4...
...Writing circuit, 5...Optical disk storage medium,
6...Original head, 7...Readout circuit, 8
...Memory, 9...Control unit.

Claims (1)

[Claims] In an optical disk storage device that can record information with high density using a laser beam, and in which the recording film and the optical head do not come into contact, there is an optical head that reads data written on the optical disk storage medium, and an upper a readout circuit that converts data into a data format that can be read by the device; a memory that is connected to the readout circuit and can store data for one track of the optical disk storage medium; and an interface that is connected to the readout circuit and converts signal levels with a host device. An optical disc storage device comprising a circuit.