JPH0945005A - Optical disk apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To search for blank sectors, written sectors at high speed by recording written blank data to an area not used. SOLUTION: Written blank sector(WBS) information are written in a RAM 4 by a sector address information editing mechanism part(SAC) 5. A CPU 3 lets the SAC 5 edit addresses of sectors and write the result to the RAM 4 when the data are to be written in a userband and lets a WBS-writing mechanism part 7 write the addresses to unused areas from the RAM 4 when an optical disc is discharged. When the optical disk is inserted, the CPU 3 outputs a read instruction to a WBS-reading mechanism part 6 to let it write data to the RAM 4. When a using sector is searched from a host device 1, the data in the RAM 4 are transferred via a SCSI controller 2. Search for unused sectors is carried out by editing addresses of unused sectors in the RAM 4 and transferring the result via the SCSI controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device, and more particularly to an optical disk device having a function of searching blank sectors and reton sectors of an optical disk at high speed.

[0002]

2. Description of the Related Art A search process for an optical disk medium (optical disk) in a conventional optical disk device searches a blank sector and a reton sector by reading the entire surface of the optical disk, or reads a target sector during a write operation. Then, it is determined whether or not writing to the sector is possible.

[0003]

As described above, in the search process for the optical disk in the conventional optical disk apparatus, the blank sector and the reton sector are searched by reading the entire surface of the optical disk, or when the write operation is performed. Since the process of reading the target sector and determining whether or not writing to the sector is possible, it takes a very long time.

[0004]

The optical disk device of the present invention realizes a high-speed search for blank sectors (unused sectors) and reton sectors (used sectors).
Reton blank sector address information regarding unused sectors and used sectors is stored in a random access memory, and the reton blank sector address information stored in the random access memory is stored in the optical disc device when the optical disc is ejected from the optical disc device. When the optical disc is inserted into the optical disc device after being written in the unused area, this reton blank sector address information written in the unused area of the optical disc is read out and stored in the random access memory. The search process of is able to be performed at high speed.

That is, the optical disc apparatus of the present invention has an inner manufacturer zone, an outer manufacturer zone and a guard band, which are unused areas in the inner band and the outer band outside the user area, respectively, and does not exist in each user band in the user area. A SCSI controller which uses an optical disc having a zone boundary unused area which is a used area, a buffer area and a test area, and which exchanges information with the host device and exchanges information with the host device, and information for the optical disc. A write / read head, a control unit for controlling the write / read operation of information from / to the optical disc by the head, and a control unit for controlling the operation of the entire optical disc apparatus, and a predetermined amount of reton blank sector address information. A sector address information editing mechanism section for formatting, a random access memory for storing the reton blank sector address information edited by the sector address information editing mechanism section, and a random access memory when the optical disc is ejected from the optical disc device. And a reton blank sector writing mechanism section for writing the reton blank sector address information stored in the optical disc to the unused area of the optical disc through the head, and the optical disc when the optical disc is inserted into the optical disc device. And a reton blank sector reading mechanism unit for reading the reton blank sector information written in the unused area through the head.

[0006]

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

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a developed view showing a zone layout of the optical disc of the embodiment of FIG. 1, and FIG. 3 is an address of a used sector of the optical disc of the embodiment of FIG. Format diagram showing data, Figure 4
FIG. 2 is a format diagram showing address data of unused sectors of the optical disc of the embodiment of FIG.

The optical disk device 9 of FIG. 1 is connected to the host device 1 by the SCSI controller 2 and exchanges information with the host device 1. Control unit (CPU) 3
Controls the writing or reading operation of information to / from the optical disk 10 of the head 8 and also controls the overall operation of the optical disk device 9. When ejecting the optical disk 10 from the optical disk device 9, the reton blank sector writing mechanism section 7 random access memory (RAM) 4
The reton blank sector address information stored in the memory is written in the unused area of the optical disc 10 via the head 8. When the optical disk 10 is inserted into the optical disk device 9, the reton blank sector reading mechanism section 6 reads the reton blank sector information written in the unused area of the optical disk 10. The sector address information editing mechanism unit 5
The sector address information to be written to the optical disc 10 is edited in a predetermined format and written in the RAM 4, and
The sector address information read from the optical disk 10 is edited into a predetermined format and written in the RAM 4.

Next, the operation of the optical disk device 9 configured as described above will be described with reference to FIGS.

FIG. 2 is a development view showing a zone layout of an optical disc 10 inserted and used in the present optical disc device 9, and shows a zone layout of a 2.6 gigabyte optical disc of the ECMA standard. This optical disk is
As shown in FIG. 2, outside the user band 26 with the zone boundary unused area 23, the buffer area 24 and the test area 25, the outer manufacturer zone 22 is provided via the guard band 21, and An inner manufacturing zone 27 is provided inside the band 26 with a guard band 21 interposed therebetween. Of these, the zone boundary unused area 23, the buffer area 24 and the test area 25, as well as the outer manufacturing zone 22, the inner manufacturing zone 27 and the guard band 21 are so-called unused areas which are not used for recording normal information. is there. The optical disc apparatus 9 utilizes these unused areas to record information (reton blank sector information) indicating whether they are used areas or unused areas for each user band, and to record those information. By reading the information, a search for an unused sector and a used sector is performed at high speed.

As shown in FIG. 3, the information on the used area of the reton blank sector information is 3 bytes (BY
It is a combination of a used sector start address 31 of TE 0 to 2) and a used sector end address 32 of 3 bytes (BYTE 3 to 5). The same applies to information about unused areas. As shown in FIG. 4, 3 bytes (BYTE
0 to 2) unused sector start address 41 and 3-byte (BYTE 3 to 5) unused sector end address 42 are combined. These pieces of information are written and stored in the RAM 4 by the sector address information editing mechanism unit 5.

The user band 2 in the optical disk device 9
When writing information to the CPU 6, the CPU 3 causes the sector address information editing mechanism unit 5 to edit the start and end addresses of the sector of the user band 26 to write the information in the format of FIG. No,
When ejecting the optical disc 10 from the optical disc device 9,
RAM 4 by the reton blank sector writing mechanism unit 7
The data is written in the above-mentioned unused area of the optical disk 10 through the head 8.

When the optical disk 10 is inserted into the optical disk device 9, the CPU 3 issues a read command of the reton blank sector information to the reton blank sector read mechanism section 6, and the reton blank sector read mechanism section 6 causes the reton blank sector read mechanism section 6 of the optical disk 10 to read. The reton blank sector information written in the unused area is read through the head 8, and is edited in the sector address information editing mechanism unit 5 in the format of FIG. 3 to be written in the RAM 4.

When a used sector is searched by a command from the host device 1, the CPU 3 transfers the information of FIG. 3 stored in the RAM 4 to the host device 1 via the SCSI controller 2.

When searching for an unused sector by a command from the host device 1, the CPU 3 causes the sector address information editing mechanism unit 5 to select a sector address shown in FIG. 4 which is not included in the information of FIG. 3 stored in the RAM 4. The file is edited in the format and transferred to the host device 1 via the SCSI controller 2.

[0016]

As described above, the optical disk apparatus of the present invention reads the entire surface of an optical disk by using the unused area of the optical disk and recording the latest reton blank sector information therein. By doing so, it is not necessary to search the blank sector and the reton sector, or to read the target sector during the write operation to determine whether or not writing to the sector is possible, so the blank sector and the reton sector are searched at high speed. The effect is that it becomes possible. this is,
It is particularly effective when the optical disc is used as a write-once optical disc.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a development view showing a zone layout of the optical disc of the embodiment of FIG.

FIG. 3 is a format diagram showing address data of a used sector of the optical disc of the embodiment of FIG.

4 is a format diagram showing address data of unused sectors of the optical disc of the embodiment of FIG. 1. FIG.

[Explanation of symbols]

 1 host device 2 SCSI controller 3 control unit (CPU) 4 random access memory (RAM) 5 sector address information editing mechanism unit 6 reton blank sector read mechanism unit 7 reton blank sector writing mechanism unit 8 head 9 optical disc device 10 optical disc 21 guard band 22 Outer Manufacture Zone 23 Zone Boundary Unused Area 24 Buffer Area 25 Test Area 26 User Band 27 Inner Manufacture Zone 31 Used Sector Start Address 32 Used Sector End Address 41 Unused Sector Start Address 42 Unused Sector End Address

Claims (2)

[Claims] 1. An optical disk having an unused area inside or outside the user area is used, and the optical disk is connected to a host device to exchange information with the host device.
A CSI controller; a head for writing or reading information to or from the optical disc; and a control unit for controlling an operation of writing or reading information to or from the optical disc by the head, and a control of an overall operation of the optical disc apparatus, The sector address information editing mechanism section for editing the reton blank sector address information into a predetermined format, the random access memory for storing the reton blank sector address information edited by the sector address information editing mechanism section, and the optical disc for the optical disc device. And a reton blank sector writing mechanism for writing the reton blank sector address information stored in the random access memory to the unused area of the optical disc through the head when ejecting from the optical disc device. Optical disc device, characterized in that it comprises a said light the unused area is in written to the re tons blank sector information through the head reading Li ton blank sector reading mechanism portion of the disc upon insertion of the optical disc. 2. A zone boundary which is an unused area for each of the inner and outer bands outside the user area, has an inner manufacturing zone and an outer manufacturing zone which are unused areas, and a guard band, and is unused for each user band within the user area. A SCSI controller that uses an optical disk having a use area, a buffer area, and a test area, and is connected to a host device to exchange information with the host device.
A head for writing or reading information to or from the optical disc, a control unit for controlling an operation of writing or reading information to or from the optical disc by the head, and a control for controlling the operation of the entire optical disc device, and a reton blank sector address. A sector address information editing mechanism section for editing information into a predetermined format; a random access memory for storing the reton blank sector address information edited by the sector address information editing mechanism section;
A reton blank sector writing mechanism section for writing the reton blank sector address information stored in the random access memory to the unused area of the optical disc through the head when the optical disc is ejected from the optical disc device; An optical disk comprising: a reton blank sector reading mechanism section for reading the reton blank sector information written in the unused area of the optical disk through the head when the optical disk is inserted into the optical disk device. apparatus.