JPH03105764A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the failure of the consistency of the data structure between plural information recording media by storing the constructive information of a user file in the multivolume management area located on an information recording medium, performing the discrimination of the information recording medium with this information being read, handling the information recording medium uniformly and performing the data protection. CONSTITUTION:A drive control unit 102 forms the multivolume management areas 203, 204 where the constructive information of a user file is stored in the preset area of plural information recording mediums 105, 106, discriminating the consistency of the constructive information of the user file by reading the constructive information of the user file from the multivolume management areas 203, 204 of the information recording mediums 105, 106 fitted to all of driving devices 203, 204 and uniformly handling the data protection of the plural fitted information recording mediums 105, 106. The failure of the consistency of the data structure between plural information recording media is thus prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an information recording and reproducing apparatus, and particularly relates to an information recording and reproducing apparatus that simultaneously uses a plurality of exchangeable information recording media such as optical disks. In database systems, etc. (1) Due to the storage capacity limitations of individual information recording media, one file may be divided and recorded on multiple information recording media. There may be cases where it is preferable to divide the information into multiple information recording media. Information writing and reading operations in an information recording/reproducing device that uses multiple information recording media may be performed as follows. Two magnetic disk drives are connected to a host system. When writing or reading a file, the host system must determine the storage address of the data to be written or read.
Next, the host system determines which of the two magnetic disk devices the storage address or data of the file obtained just before will be written to or read from. In this way, one file can be divided and stored on multiple information recording media by instructing one or both of the devices to write or read data, wait for the commanded operation to complete, and then finish the data writing or reading operation. Depending on the recording method, it is possible to store files of virtually unlimited capacity.Invention/1<Problems to be SolvedHowever, as mentioned above, an information recording and reproducing method in which one file is divided and recorded on multiple information recording media. When applied to a system that uses replaceable information storage media such as optical disks, there is a risk of destroying the integrity of the data structure between multiple information storage media in the following cases. If an information recording medium that is different from the multiple information recording media that are used for one file is stored in an optical disk device, some information may be lost because the protection status differs between the multiple information recording media that contain one file. If information is written only to the recording medium, the board of multiple information recording media that makes up one file.
Means for Solving the Problem When Only Part of the Information Recording Media Is Inadvertently Ejected In order to solve the above problem, the present invention provides a method for storing user files in the multi-volume management area on all replaceable information recording media. Information characterized by comprising a means for storing configuration information, a means for reading out the configuration information of this user file to identify the information recording medium, and a data protection means for handling all the information recording media in a unified manner. Although the present invention provides a recording and reproducing device, the present invention also provides a data protection means.A means for detecting a write protect state of an information recording medium, and detecting that at least one of the information recording media that stores one file by dividing it is in a write protect state. The present invention also provides an information recording/reproducing device characterized by comprising a means for prohibiting writing to the information recording medium when the data protection means and the information recording medium are removed. , a means for simultaneously setting all information recording media storing a file in a retrieval-prohibited state when accessing one file, and a means for setting all information recording media storing a file in a retrieval-enabled state after completion of access to the file. The present invention provides an information recording and reproducing apparatus characterized in that it is equipped with a means for setting a By reading the configuration information of the user file and identifying the consistency of the data structure of the user files that the information recording medium configures from the configuration information of this user file, the information recording and reproducing device can detect whether the information recording medium that is erroneously configured as one file is detected. It is also possible to prevent destruction of data structures between multiple information recording media when information recording media different from those stored in the information recording medium are stored. By detecting the write protect information of the medium and prohibiting writing to the information recording medium if one or more of the information recording media is in the write protect state, some information can be recorded even if the write protect state of each information recording medium is different. This prevents destruction of the data structure due to data being written only to the medium, and also prevents the removal of all information storage media that store files when accessing a file, and removes all information storage media after access is complete. By restoring the data to a possible state, data structures can be prevented from being destroyed due to some information storage media being accidentally removed during access. In the following, an information recording and reproducing apparatus according to an embodiment of the present invention will be explained with reference to the drawings. This is a block configuration diagram of an embodiment of a playback device.
and the drive control 'a device 102 is S C S I (
Small Computer System Int
erface) bus +10, and the drive control device 102 and optical disk drive device 103,
104 is ESD I (Enhanced Sma
ll Device Interface) Bus 111
Even if connected with the optical disk drive device 103,
104, each replaceable information recording medium 105.
Even if 106 is stored, the information recording medium 105,
Assuming that one file is stored in a distributed manner in the ioa (friend), a write protect state is set for each of the information recording media 105 and 106, and each optical disk drive device IO:1.1.04 is write protected. Even if the state detecting means 107 and 108 are provided, the write protect state detecting means 107 and 108 are connected to the drive control device 102 by the write protect signal line 112, and the write protect signal line 112 is pulled up by the pull up resistor 109. Optical disk drive devices 10 & 104C are provided with a locking mechanism (not shown) for prohibiting the disk ejection operation performed by the user by pressing an eject button provided on the drive housing. Prohibits removal of the information recording medium from the drive control device 102. Alternatively, the signal for setting the ejectable state <& may be input to the optical disk drive device 10 & 104 through the rotary signal line 113.
is a format diagram of each information recording medium 10.
5, 106 Multi-volume management area 203, 20 containing the configuration information of the user file of the user data domain 201, 202 and the information recording medium 105S106
Figure 3 is a flowchart showing the main control procedures in the drive control device 102 according to an embodiment of the present invention. In the information recording and reproducing apparatus, the case where the host system 101 writes data to the information recording medium 10 and 106 is taken as an example.
Although the information recording and reproducing apparatus of the present invention will be explained, in this embodiment, the information recording medium 10 is 1064;
The information recording medium is assumed to be capable of storing data for 50,000 addresses from address o to address 49999.The information recording medium does not need to be formatted before use. The formatting of the information recording media 105 and 106 in the host system 101 may be performed as follows.
is the drive controller via the SCS I bus 110! When the drive control device 1024 receives this command, it first generates a random number, and based on this random number, it creates a volume set, that is, a collection of information recording media that constitutes a set of information. For example, the drive control device 102 has two optical disk drive devices 10.
Therefore, even if 3 and 104 are connected, the drive control device 1021 connects the information recording media 105 and 106 to the first and second volumes of the volume set "GROUP33", respectively.
The components of the drive control device 1024 and the information recording medium 1 (K 106 that configure the multi-volume management area on the drive control device 102!;t. At address 49999, which is the last address, the volume set name 'GROUP33'' (203a) and the number of information recording media composing the volume set m2'' (2
03b) and the serial number "B" (203c) of the information recording medium in the volume set.
At address 999, as shown in Figure 2, the name of the volume set 'GROUP33' (204a) and the number of information recording media that monitor the volume set '2' (204b).
and write the serial number "2" (204c) of the information recording medium in the volume set. This completes the formatting operation of the information recording and reproducing apparatus of this embodiment. At this time, the number of areas in which the user can record data is 2. The user data areas 201 and 202 of the two information recording media 105 and 106 have a total of 99998 addresses.

9999 from address ooooo on host system l01ζ
Although it is possible to store data for addresses 99998 up to address 7, the host system 101 recognizes that one optical disk drive containing the information recording medium is connected via the drive control device 102.Next, the host system 101 drives the drive. Information recording medium 105, 1 via control device 102
The operation of actually writing data to the host system 1014 will be explained with reference to the flowchart in FIG. 509 from address 49000
Assume that user data up to address 99 is to be written onto an information recording medium. First, when writing information, the host system 101 instructs the drive control device 102 to report the status of the optical disk drive device.
When the drive control device 102 receives this command, first the multi-volume management area 203 . The precept information of the user file already stored in 204 is read out (process 301).

Next, the two information recording media 1 on the drive control device 102i
05, 106 is correctly configuring one volume set.
Multi-volume management area 203 read just before crowning
, 204. It is checked whether the two information recording media belong to the same volume set (processing 302).

If the information recording media belong to the same volume set, it is further checked whether the number of information recording media making up the volume set is correct (process 303). At this time, if the information recording media do not belong to the same volume set or if the number of information recording media is incorrect, the drive control device 102 changes the status of the optical disk drive device from the host system's perspective to "The information recording medium is incorrect.""Notinserted" (processing 305). The status is reported to the host system OL (process 307). In this embodiment, the information recording media 105 and 106 are constituent elements of the volume set 'GROUP33' as shown in 203 and 204a in FIG.
As shown in 203b and 204b, the volume set "GROUP33" is composed of two information recording media, so the number of information recording media that make up the group to be accessed does not match the actual number of information recording media. and the volume set "GROUP33"
Even if the drive control device 102 is properly configured,
Once the volume set is configured correctly in this way, the write protect state of the information recording medium is checked (processing 304).

The write protect status of the information recording medium may be inspected as follows: Each optical disk drive device 103.104
Write protection detection means 107 and 108 housed in
Lt. Information recording medium 105 or 1
Even if the write protect state of 06 is output, if the write protect state is detected (above). Drop the potential of the drive control device 102 to the ground. The potential of the write protect signal line 1l2 is detected, and if this potential is equal to the ground potential, either or both of the information recording medium 105 and IOA are in the write protect state. When it is determined that the drive control device 1 0 2 1, t.
The state of the optical disk device viewed from the host system is assumed to be "the information recording medium is write-protected" (process 306). After this, the drive control device 102 reports the status to the host system 101 (process 307). Host system 1 0 1 ft Drive control device 1
The status of the optical disk drive device reported from 02 is "
In the case of ``The information recording medium is not inserted correctly'' (a) In the case of ``The information recording medium is write-protected'' (all processes are canceled after performing error processing) In this embodiment (Information recording medium 105 , 106 configures the volume set "GROUP33" and both are not write-protected, so the host system 101 is notified that "the information recording medium is inserted correctly and is not write-protected".
01 continues processing, but then the host system 101 instructs the drive control device 102 to write data to the information recording media 105, 106, and transfers the data to be written and its address. Before writing data, all information recording media to be accessed are locked (process 308). In this embodiment, the potential of the lock signal line +13 is lowered from the power supply potential to the ground potential. The optical disk drive devices 10 & 104 detect this and simultaneously record information using their respective locking mechanisms. medium l05,+0
6 is prohibited from being ejected.Next, drive control unit @l
02fL The optical disk drive device containing the information recording medium to which data is to be written is identified from the precept information of the user file stored in the multi-volume management area that has already been read (process 309).

From this identification result, an optical disk drive device corresponding to each piece of data is selected, the address of the data to be written is converted for each optical disk drive, and the selected optical disk drive device is caused to write each data (process 310 ). This data writing process is repeated until there is no more data to write (process 3l1
). Drive control device 1 0 2 i;L Waits for the end of data writing and instructs each optical disk drive device to unlock the information recording medium (process 312). In this embodiment, the drive control device 1
0 2 +1 203c in the multi-drive control area,
204c or the first component, the information recording medium 105, is the optical disk drive device 1034, l,
It is learned that the second component, the information recording medium l06, is stored in the optical disc drive device i104. At this time, the area for recording user data on the information recording medium of each drive control device 10 2 it has 499
We know that the data for address 99 can be stored, and from this we can see that the optical disk drive device IO3 containing the information recording medium, which is the first component, stores data from address oooooo to address 49998 from the host system 10l. Power <． The optical disc drive device 104 containing the information recording medium, which is the second component, has 4999 discs.
It is determined that data from address 9 to address 99997 is stored. Based on this determination, the drive control device 102i
;L 4 from the host system lO1 to write
Continuous data from address 9000 to address 50999 is divided into data from address 49000 to address 49998 and data from address 49999 to address 50999.
Divided into 4900 as seen from the host system.
Data from address 0 to address 49998 is data A, 4
The data from address 9999 to address 50999 is called data B. Information recording medium 105 is volume set 'G'.
It is the first component of ROUP 33', and the address on the information recording medium 105 and the address of the data seen from the host system 101 match.The drive control device 102 selects the optical disk drive device 103, and selects the selected optical disk device i. 49000 on the information recording medium 105 to 103
Write data A from address to address 49998
The information recording medium 106 is a volume set 'GROUP3
Since it is the second structure element of 3', the information recording medium 106
The above data address is equal to the data address seen from the host system 101 minus 49999, the number of data addresses that can be stored in the user data recording area of one information recording medium (drive control device 102i; L
Select the optical disk drive device 104 and write (4) on the information recording medium 106 to the selected optical disk device 104.
9999-49999-0) from address (50999-4
9999-1000) Drive control device l02J. t. After waiting for the completion of the above data writing operation, the potential of the lock signal line 113 is returned from the ground potential to the power supply potential. Each optical disk drive device 103, 104 detects this and simultaneously releases the locking mechanism and transfers the information. recording medium 105,
106 is returned to a removable state.

The above explains how to use a system using multiple information recording media.
From the host system 101 to the information recording medium 105.106
As described above, in this embodiment, a system for storing a set of data in a plurality of information recording media and recording and reproducing information using the information recording and reproducing apparatus of the present invention. In , the information recording medium is identified in line L\.The write protect information of the information recording medium is handled collectively using a newly added signal line 1, X.
Furthermore, by handling the ejection prohibited state of multiple information recording media at the same time using another signal line, it is possible to easily prevent data consistency between the information recording media from being destroyed.
In this embodiment, only the operation of writing data to the information recording medium was explained. By replacing the information recording and reproducing apparatus of the present invention, the information recording and reproducing apparatus of the present invention can be similarly applied. Furthermore, the present invention is also applicable to information recording and reproducing apparatuses that use replaceable disc-shaped information recording media other than optical discs. In addition to the effects of the invention, the information recording and reproducing apparatus ζ of the present invention can store one user file in a distributed manner on a plurality of exchangeable information recording media, and can store data on all exchangeable information recording media. The configuration information of a user file containing the configuration information of the information recording medium is stored in a predetermined area, and this information is read out to identify the consistency of the data structure configured by the information recording medium. In addition, in order to prevent data from being written to only some of the information recording media, there is a means for prohibiting writing to the information recording medium when it is detected that at least one of the information recording media is in a write-protected state; In order to prevent only a part of the information recording media from being taken out, data is protected by means of simultaneously setting all the information recording media in a state where removal is prohibited or enabled. In this way, it is possible to maintain data consistency between multiple information recording media that store one user file.

[Brief explanation of drawings]

Figure 1 shows the format of the information recording medium according to the embodiment of the present invention. Figure 2 shows the format of the information recording medium according to the embodiment of the present invention.
The figure is a flowchart showing the main processing steps of the embodiment of the present invention.101...Host system 4 102...Drive control device 10 & 104...Optical disk drive device IO5, 106... information recording medium
107, 108...Write protection information detection hand i
109...Pull-up resistance! 10...SC
SI bar entry 111...ESDI bar,'! ,, 1
12...Write protection signal lock 113...Lock signal wind 201, 202---User data area [203, 204...Multi-volume management area

Claims (5)

[Claims] (1) A plurality of drive devices that use replaceable disk-shaped information recording media and a drive control device that controls data recording and reproducing operations for the information recording media installed in the drive devices, and a user file can be stored in a plurality of parts. An information recording and reproducing device having a function of dividing files into files and recording them on a plurality of said information recording media, and reading out partial files recorded in a distributed manner on a plurality of said information recording media to edit a user file. , means for forming a multi-volume management area storing configuration information of the user file in a predetermined area of a plurality of the information recording media, and a multi-volume management area of the information recording media loaded in all the drive devices. means for reading the configuration information of the user file from the user file to identify the consistency of the configuration information of the user file, and data protection means for uniformly handling data protection of the plurality of information recording media installed. Information recording and reproducing device featuring features. (2) The data protection means includes a write protection state detection means for each installed information recording medium, a means for detecting that at least one of the information recording media is in a write protection state, and at least one of the information recording media. Claim (1) further comprising means for prohibiting writing to all information recording media on which the partial file is recorded when it is detected that the partial file is in a write-protected state.
1) The information recording and reproducing device described above. (3) The data protection means includes a lock mechanism that temporarily prohibits the user from removing the information recording medium, and a lock mechanism that temporarily prohibits the user from removing the information recording medium, and a lock mechanism that locks all information recording media on which partial files are recorded and played back before the start of the user file recording/playback operation. Claim (1) further comprising means for setting all information recording media on which partial files have been recorded and played back to a retrieval prohibited state and to a retrieval enabled state after the end of the recording and reproducing operation of the user file. information recording and reproducing device. (4) The write protect state detecting means for each information recording medium includes a write protect state detecting section that changes the potential of a connected signal line when detecting the write protect state of the information recording medium, and The means for detecting that one of the drive devices is in a write protect state includes means for detecting the potential of one signal line connecting the write protect state detection section of each drive device and the drive control device. Claim (2)
The information recording and reproducing device described. (5) The means for setting all the information recording media in the eject-prohibited state and the eject-enabled state is a means for controlling the lock mechanism through one signal line connecting the drive control device and the lock mechanism of each drive device. The information recording and reproducing apparatus according to claim (3), characterized in that the information recording and reproducing apparatus comprises: