JP2001266464A - Data recording and reproducing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge a recording medium before the number of defective sectors of the recording medium exceeds the number of replaceable sectors of a spare region. SOLUTION: This device has a main recording section which records the data to be inputted, an auxiliary recording section which records the data of the main recording section to the attachable and detachable recording medium, a counter section for the number of the initial defective sectors for counting the number of the initial defective sectors, a counter section for the number of the defective blocks for counting the number of the defective blocks detected during the recording of the data to the recording medium, a control section and a display section. The control section totals the number of the defective sectors outputted from the counter section for the number of the initial defective sectors and the number of the defective blocks outputted from the counter section for the number of the defective blocks and dischargers the recording medium by controlling the display section so as to display the effect that the recording medium is no usable on the display section when the totaled number exceeds a preset value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a data recording / reproducing apparatus for recording and reproducing data.

[0002]

2. Description of the Related Art In a data recording and reproducing apparatus for recording and reproducing data, an HDD connected to the data recording and reproducing apparatus is used.
Data recorded in a main recording unit such as a (Hard Disk Drive) may be recorded on a removable recording medium (hereinafter referred to as a removable medium) and stored (hereinafter referred to as a backup). The data recorded on the removable medium is data and recording information data for managing the recorded data. In a conventional data recording / reproducing apparatus, a DAT (Digi) having a large recording capacity is used as a removable medium.
tal Audio Tape) is used.

[0003]

In a conventional data recording / reproducing apparatus using a DAT drive as an auxiliary recording device, if there is a defect in which data cannot be recorded in a part of the DAT as a recording medium, the defect is skipped. Recording in a recording area free from defects. DAT is useful as a recording medium for data backup because of its large recording capacity.

In recent years, DVD-RAM (Digital Versatile Disc-Random Access) has been used as a high-density removable medium.
Memory) has been put to practical use. The DVD-RAM is a recording medium on which data can be accessed at random, so that it can be used as a removable medium that can search and reproduce the backed up data at high speed. DVD-RAM
Can record data intended to be recorded in a defective portion in a predetermined spare area of the recording medium even if there is a defective portion in which data cannot be recorded in a part of the recording medium. The recording capacity of this spare area corresponds to about 5% of the total recording capacity. Therefore, even if there is a defect in the data recording area, by recording the data in the spare area, it is possible to treat the data as if there is no defective part when recording and reproducing the data.

[0005] Nikkei Electronics (issued October 6, 1997, No. 700 and issued October 20, 1997, Issue 701) discloses technical information on the DVD-RAM standard.

According to this document, a DVD-RAM has a whole user area divided into 24 zones, and a spare area shown in FIG. 2 is provided on the outer peripheral side of each zone. The recording capacity of the spare area is about 5% of the user area. Therefore, when the data amount of the defective portion in the user area of the DVD-RAM exceeds about 5% of the total recording capacity, there is a possibility that data recorded on the HDD serving as the main recording device cannot be backed up correctly.

According to the present invention, when a removable medium is used for backup, if there are many defective areas where data cannot be recorded in the user area of the recording medium, the number of defective sectors in the user area is reduced by the number of sectors in the spare area. It is an object of the present invention to provide a data recording / reproducing apparatus capable of ejecting a recording medium from a data recording / reproducing apparatus before the data recording / reproducing apparatus can reliably perform backup.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a data recording / reproducing apparatus capable of recording and reproducing data, a main recording section for recording input data on a recording medium, and a main recording section for recording data on the recording medium of the main recording section. An auxiliary recording unit that records the obtained data on a removable recording medium, an initial defective sector number counting unit that counts the initial defective sector number of the removable recording medium,
A defective block number counting unit that counts the number of defective blocks detected while recording data on the removable recording medium, and a control unit that controls the operation of the data recording and reproducing device,
The control unit sums the number of defective sectors output from the initial defective sector number counting unit and the number of defective sectors determined by the number of defective blocks output from the defective block number counting unit, and the total number is preset. The data recording / reproducing apparatus controls to eject the removable recording medium when the value exceeds the value.

According to the present invention, there is provided a data recording / reproducing apparatus capable of recording and reproducing data, wherein a main recording section for recording input data on a recording medium, and data recorded on the recording medium of the main recording section. An auxiliary recording unit for recording on the removable recording medium; an initial defective sector number counting unit for counting the number of initial defective sectors on the removable recording medium; and a defect detected during recording of data on the removable recording medium. A defective block number counting unit that counts the number of blocks, a control unit that controls the operation of the data recording and reproducing device, and a display unit,
The control unit sums the number of defective sectors output from the initial defective sector number counting unit and the number of defective sectors determined by the number of defective blocks output from the defective block number counting unit, and the total number is preset. A data recording / reproducing device that controls the display unit to display on the display unit that the removable recording medium cannot be used when the value exceeds the value, and controls to eject the removable recording medium.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the data recording / reproducing apparatus according to the present invention will be described. FIG. 1 is a diagram showing a configuration of a data recording / reproducing apparatus provided with a DVD-RAM drive according to one embodiment of the present invention.

The HDD 1 is a main recording unit for recording input data, which constitutes the data recording / reproducing apparatus of the present invention. D
The VD-RAM drive 2 is an auxiliary recording unit for backing up data recorded on the HDD 1. HDD
1 stores data input from the outside, and when data is accumulated up to a certain amount, old data is deleted. However, even if the data is old data, the data may be confirmed. Therefore, it is necessary to periodically record the data in the HDD 1 on a DVD-RAM which is a removable medium.
Recording data recorded on a recording medium in the main recording device such as the HDD 1 on an auxiliary recording medium such as a DVD-RAM in this manner is called backup. D
The data in the HDD 1 backed up in the VD-RAM is erased, and the newly input data is recorded.

The HDD 1 is an external main recording unit connected to the data recording / reproducing apparatus of the present embodiment by SCSI (Small Computer System Interface). Data read from the HDD 1 is stored in the SC board connected to the SCSI boards 3 and 4.
SI bus and PCI (Peripheral Component Interconn
ect) It is transmitted to the DVD-RAM drive 2 via the bus. The SCSI bus and the PCI bus have data,
This is a signal transmission path for transferring commands for controlling a CPU (Central Processing Unit) 5, the HDD 1, and the DVD-RAM drive 2. The memory 10 is used as an internal memory for temporarily storing programs and data executed by the CPU 5.

The CPU 5 outputs commands for controlling the HDD 1 and the DVD-RAM drive 2 and receives signals input from the keyboard 7 and the mouse 8 to control data processing and operation of the data recording / reproducing apparatus. In addition, a signal for displaying recording information on data is sent to the monitor device 9.

The DVD-RAM drive 2 contains unused D-RAM drives.
When the VD-RAM is used, the DVD-RAM is initialized to detect a defective sector. The initial defective sector number counting unit 11a counts the number of defective sectors detected at the time of initialization.

The defective block number counting section 11b counts the number of defective blocks detected by the error detecting section provided in the DVD-RAM drive 2 while recording data. The error detection unit records an error check code at the same time as the data, and after recording, reads the recorded data and the error check code, performs an error check operation, calculates error data called a syndrome, and detects an error in the data. To detect.

In this embodiment, a counter circuit is used for the initial defective sector number counting section 11a and the defective block number counting section 11b, but a program or a CPU 5 for performing processing for counting the number of sectors and the number of blocks is used. It can also be realized by using the internal registers described above.

The data input unit 12 receives data input to the data recording / reproducing device. The data input to the data input unit 12 is recorded on the HDD 1.

The input / output unit 6 includes a monitor device 9 in addition to an input device for a keyboard 7 and a mouse 8. Keyboard 7
The mouse 8 is an operation unit for inputting data search conditions and instructing the operation of the data recording / reproducing apparatus. The monitor device 9 is a display device that displays operation contents and operation results of the keyboard 7 and the mouse 8.

FIG. 2 shows a DVD-RAM recorded by the DVD-RAM drive 2 of the data recording / reproducing apparatus of the present embodiment.
FIG. 3 is a schematic diagram illustrating an arrangement of data in a RAM. DVD
-The recording area of the RAM is divided into 24 zones, zone 0 to zone 23, and each zone has a user area and a spare area. Data to be recorded in the user area is recorded in units of blocks, and one block is composed of 16 sectors and one sector is composed of 2 kilobytes of data. Therefore,
One block is composed of 32 kilobytes of data. Data is recorded in the user area and the spare area. The spare area has a defective sector which is a sector of a defective part of the user area or a substitute sector or a substitute block which is assigned to a defective block which is a block of the defective part. Data that could not be recorded in the user area is recorded in a substitute sector or a substitute block. Information on the physical address of the spare sector or the spare block of the spare area allocated to the defective sector or the defective block is recorded as a defect list in the lead-in area and the lead-out area.

The information on the physical address relating to the defective sector is recorded in a list of defective sectors, and is a PDL (Primary Defect Lis
t) The physical address of the defective sector is recorded after the recognition mark. Also, the information of the physical address related to the defective block is recorded in a list of defective blocks, and indicates an SDL (Secondary Defect
List) After the recognition mark, the physical address of the first sector of the defective block is written.

FIG. 3 shows a data recording / reproducing apparatus according to the present embodiment in which the data of the HDD 1 is transferred to the DVD-RAM drive 2.
6 is a flowchart showing a backup operation for recording data on a DVD-RAM mounted on a DVD-RAM.

The data recorded on the HDD 1 is transferred to a DVD-R
When recording and backing up to AM, first, D
Insert the VD-RAM into the DVD-RAM drive 2 and
Initialize the VD-RAM. (S1), (S2)

In S2, if the DVD-RAM is an unused disk, the DVD-RAM is initialized and inspected for initial defects. An alternate sector in the spare area is assigned to the defective sector. At this time, the defective sector number counting section 11a counts the initial defective sector number of the defective portion.
Also, the physical address of the initial defective sector is recorded in the defective sector list. (S3)

In S4, it is determined whether or not the counted number of initial defective sectors exceeds a preset value. Here, the preset value may be, for example, a number corresponding to １ ／ of the total number of alternative sectors recordable in the spare area. If the value exceeds a preset value, the DVD-RAM mounted on the DVD-RAM drive 2 is determined to be a defective disk having a large number of defective portions and cannot be used as a backup recording medium. Display on the display,
At the same time, it is ejected from the DVD-RAM drive 2. (S
4), (S13), (S14)

In S4, if the counted number of the initial defective sectors does not exceed the preset value, a selection is made as to whether or not the data recorded in the HDD 1 is backed up by the operation of the operator. If the backup operation is not performed, the process ends without performing the backup operation. (S5)

When data is backed up to the DVD-RAM, data is read from the HDD 1 and recording on the DVD-RAM is started. (S6)

While backing up data to the DVD-RAM, the number of detected defective blocks is counted by a defective block number counter 11b. (S7)

The number of initial defective sectors and the number of defective blocks are 16
The number of sectors obtained by adding the multiplied number of sectors is calculated, and it is checked whether the number exceeds a predetermined value. In a DVD-RAM, since one block is composed of 16 sectors, the number K of defective sectors is obtained by K = the number of initial defective sectors + the number of defective blocks × 16. (S8), (S9)

If the value of K exceeds the preset value in S9, the DVD-RAM is displayed on the display unit as a defective disk, and the disk is ejected from the DVD-RAM drive 2. (S9), (S13), (S14)

In step S9, if the value of K does not exceed the preset value, the data recorded in the HDD 1 is deleted.
Record in VD-RAM. (S9), (S10)

It is confirmed whether data to be backed up remains in the HDD 1. If the data remains, the process proceeds to S7 to continue the operation of taking in the data of the number of defective blocks while continuing the data backup.
(S11)

In S11, if there is no data to be backed up in the HDD 1, the backed up data recorded in the HDD 1 is deleted. HDD1
Newly input data is recorded in a recording area where data has been deleted from the hard disk. (S1
2)

As described above, if the DVD-RAM mounted on the DVD-RAM drive 2 is a defective disk, the fact that the disk is defective is displayed on the display unit,
Since the DVD-RAM is controlled so as to be ejected from the DVD-RAM drive 2, it is possible to easily recognize that the DVD-RAM is a defective disk, and immediately
The backup operation can be performed by replacing the RAM;

Although the removable medium used in the data recording / reproducing apparatus of this embodiment is a DVD-RAM, it may be a removable medium such as an optical disk other than the DVD-RAM or a magnetic recording medium. Alternatively, an individual memory such as an IC memory may be used.

[0035]

According to the present invention, in a data recording / reproducing apparatus for backing up data recorded in a main recording section on a removable recording medium mounted on an auxiliary recording section, a recording medium mounted on the auxiliary recording section When there are many defective parts such as scratches, it is displayed before the number of defective sectors of the recording medium reaches the number of alternative sectors that can be recorded in the spare area of the recording medium that the recording medium is a defective recording medium. Since the recording medium is ejected, it is possible to easily recognize that the mounted recording medium is a recording medium having many defects, and to immediately replace the recording medium with a new recording medium and execute a backup operation. .

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a data recording / reproducing apparatus including a DVD-RAM drive according to an embodiment of the present invention.

FIG. 2 shows a DVD-RA of the data recording / reproducing apparatus of the embodiment.
FIG. 3 is a schematic diagram for explaining an array of data of a DVD-RAM recorded by an M drive 2.

FIG. 3 illustrates a data recording / reproducing apparatus according to an embodiment of the present invention.
9 is a flowchart showing an operation of backing up data of D1 to a DVD-RAM mounted on a DVD-RAM drive 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 HDD 2 DAD-RAM drive 3, 4 SCSI board 5 CPU 6 I / O device 7 Keyboard 8 Mouse 9 Monitor device 10 Memory 11a Initial defective sector number counting section 11b Defective block number counting section 12 Data input section

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G11B 20/18 552 G11B 20/18 552Z

Claims (2)

[Claims] 1. A data recording / reproducing apparatus capable of recording and reproducing data, comprising: a main recording section for recording input data on a recording medium; and a detachable recording medium for recording data recorded on the recording medium of the main recording section. An auxiliary recording unit for recording on a medium,
An initial defective sector number counting unit that counts the number of initial defective sectors of the removable recording medium; a defective block number counting unit that counts the number of defective blocks detected while recording data on the removable recording medium; A control unit for controlling the operation of the data recording / reproducing apparatus, wherein the control unit is determined by the number of defective sectors output from the initial defective sector number counting unit and the number of defective blocks output from the defective block number counting unit. A data recording / reproducing apparatus, comprising: summing the number of defective sectors; and, when the total number exceeds a preset value, controlling to eject the removable recording medium. 2. The data recording / reproducing apparatus according to claim 1, further comprising: a display unit, wherein the control unit is configured to count the number of defective sectors and the number of defective blocks output from the initial defective sector number counting unit. The number of defective sectors determined by the number of defective blocks output from the unit is summed, and when the total number exceeds a preset value, the display unit indicates that the removable recording medium cannot be used. A data recording / reproducing device for controlling a display unit.