JPH02235264A - Electronic filing device - Google Patents

Abstract

PURPOSE:To improve an access speed by discriminating the zone of objective information, and after moving to the zone and executing the recording or reproducing and substituting processing of the information by using a substitutive area and a substitution control area in the zone. CONSTITUTION:When a disk 11 is loaded, a batch control area is read out from a batch control area 17 and stored in a RAM 5. When an instruction for commanding the recording or reproducing of information is sent from a host computer 10, the address of an objective sector is read out and which zone out of zones 12 to 14 includes the objective sector is decided based upon the batch control information. The zone including the objective sector is seeked based upon the decided result, and then substitutive processing for recording/ reproducing is executed by using the information in the substitution control area 12A to 14A in the zone. Consequently, the access speed at the time of substitutive processing can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic file device that records or reproduces information on a recording disk using the MCAV method. [Prior Art] Conventionally, in electronic file devices that record and reproduce information on recording disks such as optical disks, in view of the recording density on the recording disk, as a data recording method, the angular velocity is set on the recording track. The CAW method forms recording pits at a constant linear velocity, and the C method forms recording pits at a constant linear velocity.
It is broadly divided into LV method. In the CAV method, since recording is performed at a constant angular velocity, the recording density on the outer circumference side of the disk is lower than on the inner circumference side, and is inferior to the CLV method in terms of efficient use of recording capacity. on the other hand. The CLV method has the disadvantage that the access time is long because the sectors are not radial and the rotation speed varies depending on the recording position. Therefore, for example, in Japanese Patent Application Laid-Open No. 59-187874, MCAV, which has both the easy access of the CAV method and the superior recording density of the CLV method, is proposed.
A method has been proposed. In other words, this MCAV method divides the disk in the radial direction into multiple zones,
By recording at a lower rotational speed toward the outer circumference, this method improves the drawback of the CAV method in that the recording density decreases toward the outer circumference. Furthermore, as an MCAV method having a similar effect, a method has been proposed in which the rotational speeds on the inner and outer circumferences are kept constant, and recording is performed by increasing the recording/reproducing frequency toward the outer circumference. By the way, optical discs are a typical recording medium for such electronic file devices, but write-once recording media such as optical discs generally have defective areas on the disc that make it impossible to record or play back. In this case, an alternative area is provided in another area on the disk. In other words, in such an electronic file device, after information is recorded, it is immediately played back and checked for errors, and when a defective location is detected, this information is rewritten into a predetermined replacement block. Note that a block here refers to a single recording/playback unit in this electronic file device, and specifically corresponds to a sector or a track. As a method of preparing an area for preparing such an exchange block, for example, as disclosed in Japanese Patent Publication No. 60-49988, an exchange sector is prepared on one track, or as disclosed in Japanese Patent Application Laid-Open No. 60-95768. As disclosed in publications, etc., there are some exchange tracks in several tracks, and as disclosed in Japanese Patent Laid-Open No. 60-74158, etc., there are exchange sectors on one track and in several tracks. There are some known types that have both a replacement track and a replacement track. In addition, when performing substitution processing using such exchange blocks, it is necessary to manage the substitution status. One of the management methods is information (address information) that indicates which blocks have been exchanged.
There is a system in which the data is written all at once to a management area prepared on the disk in advance, and when an error occurs during playback, the management area is referred to and the corresponding replacement block is searched. [Problems to be Solved by the Invention] However, in the above-mentioned MCAV type device, since the angular velocity of the disk or the frequency of recording and reproduction differs for each zone, the management area for the above-mentioned alternative processing is provided in one place. In this case, when moving from a management area to an exchange area in a different zone, it is necessary to change the angular velocity or recording/playback frequency, which has the disadvantage of slowing down the access speed. Therefore, the present invention. The purpose of this paper is to provide an electronic file device that can improve access speed during alternative processing in the MCAV system. [Means for Solving the Problems] The present invention divides a disk-shaped information recording medium into a plurality of zones in the radial direction, and performs recording or reproduction in each zone using a different rotational speed of the information recording medium or a different frequency signal. In the electronic file device, the information recording medium has an alternative area for storing replacement blocks for performing alternative processing for bad blocks during recording/reproduction, and an alternative management area for storing management information for the alternative processing. It is characterized by providing a collective management area for each zone and storing collective management information for each zone. [Operation] In the present invention, the target information zone is determined based on the collective management information, and after moving to this zone, the information is recorded or reproduced using the alternative area and the alternative management area within this zone. Perform alternative processing. [Embodiment] FIG. 1 is a block diagram showing an embodiment of the present invention. The electronic file device 1 of this embodiment uses an optical disk as a recording medium, and includes a SCSI adapter 2, an MPU 3,
．． ROM4. RAM5, ECC circuit6. I/O control section 7
, has a read/write section 8. Further, this electronic file device 1 is controlled by a host computer IO. Based on the program in ROMA, MPU3
In addition to controlling this electronic file device 1 as a whole,
Performs alternative processing such as replacing bad sectors that occur on optical disks. Furthermore, when information is recorded on the optical disc, the ECC circuit 6 adds/adds an error correction code (ECC) to this information.
In addition to deleting bad sectors, it also performs a verification check to detect bad sectors. Further, the read/write unit 8 records and reproduces information on the optical disc, and includes an optical disc rotation control unit, an optical pickup device drive control unit, a recording/reproduction signal processing circuit, and the like. ing. In the electronic file device l of this embodiment, information is written and reproduced in units of l sectors (that is, 1 block = 1 sector). The above-mentioned defective sector replacement process is managed by sequentially writing the address of the defective sector and the address of the replacement sector into a management area, which will be described later. In addition, in this embodiment, of the two MCAV methods described above, the recording area of the optical disc is divided in the radial direction to form a plurality of annular zones, and the rotation speed increases from the inner zone to the outer zone. MC who lowers the number and performs Ki II/playback
It uses the AV system. Note that in the recording/reproduction operation using the MCAV method, the MPU 3 identifies which zone the head will move to based on the reproduction signal from the read/write unit 8, and performs a predetermined operation according to the identification result. This is done by supplying a rotational speed control signal to the read/write unit 8. Additionally, this rotational speed change operation is performed in the change area provided between each zone. FIG. 2 is a schematic diagram showing the structure of the storage area of the optical disc 11 used in this electronic file device l, and FIG. , is a schematic diagram expressed linearly. This optical disc 11 is provided with three zones l2, l3, and l4 divided in the radial direction. Each zone 12, 13, 14 has alternative management areas 12A, 13A, 14A, information area 12B, .
13B, 14B, and alternative areas 12C, 13C, 14C. , each alternative management territory 12A. 13A. 14A stores information regarding alternative processing for each zone l2, 13, and l4. That is, this information consists of the address of the bad sector and the address of the replacement sector for each alternative process. In addition, each information area 12B. 13B and 14B store image information, etc. that is the object of the file. Furthermore, each alternative area 12c, 13C. 14G includes the information areas 12B, 13B. Replacement sectors corresponding to bad sectors that occurred in 14B are stored. Moreover, between each zone 12% 13.14, there is an area L5 for changing the rotational speed of the optical disc 11, as described above.
．． l6 is provided. Furthermore, this optical disc 11
A collective management area 17 is provided for collectively managing the zones 12, 13, and l4. This collective management area l7 stores information (hereinafter referred to as collective management information) indicating how each sector for the information file is allocated to each zone l2, l3, and l4. ．． In other words, by referring to this collectively managed territory l7, the target sector can be determined in which zone l2.
, 13, and l4. Furthermore, the status of alternative processing in each zone 12, 13, and l4 is also stored in this integrated management area l7. In the electronic file device 1 of this embodiment, when the disk 11 is loaded, the batch management information is first read out from the batch management area 17 and stored in the RAM 5. Note that the collective management information stored in this RAM 5 is stored on the relevant disk 1.
It is retained until it is ejected from the electronic file device 1. When a command to record or reproduce information is sent from the host computer 10, the address of the target sector attached to this command is read, and based on the collective management information, it is determined which zone the target sector is located in. l2, 13
, 14. Then, based on this judgment result, seek is performed to the zone where the target sector exists, and after this, the alternative management areas 12A, 13A,
The information in 14A is used to perform alternative processing during recording and playback. FIG. 4 is a flowchart showing the operation when recording information on the optical disc l1. First, the target zone is accessed using the collective management information stored in the RAM 5 as described above. After recording information in units of one sector (SL). A verification check is performed by the ECC circuit 6 to see if this information has been reproduced and recorded normally (S2). If this information is normal or within the error correction capability of the ECC circuit 6 (S3), the process moves to the next sector recording operation (34). Corrections are explained in detail in, for example, ``Coding Theory'' (written by Miyagawa et al., published by Shokodo in 1973). Also. The recorded information is not normal in S2, and the EC
If the error exceeds the error correction capability of the C circuit 6 (33), it moves to the exchange area (36), records it in the exchange sector (S7), moves to the alternative management area (Sa),
Record the management information (S9), and move on to the next sector recording operation (S10). FIG. 5 is a flowchart showing the operation when reproducing information on the optical disc 1l. First, the above RAM
Access the zone where the target sector exists using the collective management information stored in 5. Then, the information is reproduced sector by sector (S21), and the ECC circuit 6 checks whether the reproduced information is normal (322), and whether the reproduced information is normal or the ECC circuit 6 has error correction capability. If it is within the range (S23). The process moves to the playback operation of the next sector (S24). Furthermore, if the reproduced information is not normal and exceeds the error correction capability of the ECC circuit 6, it moves to the alternative management area (S25) and reproduces the alternative management information (S25).
26). Then, search for the address of the corresponding exchange sector and move to the area where this exchange sector is recorded (S
27). Regenerating the target exchange sector (528);
Shifts to the playback operation of the next sector (S29). In the above embodiment, for the sake of simplicity, the configuration has been described in which both recording and playback are performed in sector units. can be similarly applied. Furthermore, the present invention is applicable not only to an electronic file device using an optical disk as a recording medium as in the above embodiment, but also to a device using other information recording media that performs recording and reproduction in units of predetermined blocks using the MCAV method. It is possible. Further, the present invention is not limited to a device for both recording and reproduction as in the above embodiments, but can be configured as a recording-only or reproduction-only device. [Advantageous Effects of the Invention 1] According to the present invention, the target information zone is determined based on the collective management information, and after moving to the zone, the information is stored using the alternative area and alternative management area within this zone. By performing recording or playback and alternative processing, there is no need to change the angular velocity or the recording or playback frequency during the alternative processing, and the access speed can be improved accordingly.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a schematic diagram showing the structure of the storage area of the optical disk used in the apparatus of the embodiment. FIG. 3 shows tracks formed on the optical disc.
This is a schematic diagram linearly representing the configuration of a storage area. FIG. 4 is a flowchart showing the operation when recording information on an optical disc in the same embodiment apparatus. FIG. 5 is a flowchart showing the operation when reproducing information on an optical disc in the apparatus of the embodiment. 12C, 13c,

Claims (1)

[Claims] An electronic file device that divides a disk-shaped information recording medium into a plurality of zones in the radial direction and performs recording or reproduction in each zone using a different rotational speed of the information recording medium or a different frequency signal. The information recording medium is provided with an area for storing replacement blocks for performing alternative processing for defective blocks during recording or reproduction, and an area for storing management information for the alternative processing, for each zone, and for each zone. An electronic file device characterized by having a collective management area for storing zone collective management information.