JP3743018B2 - Data recording device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a data recording apparatus capable of simultaneously inputting / outputting a plurality of AV data.
[0002]
[Prior art]
Conventional data recording apparatuses capable of recording large-capacity data such as AV data including one or both of digitized audio data and video data are shown in FIG. 9 and FIG. There is a data recording apparatus configured as described above.
FIG. 9 is a block diagram showing the configuration of such a data recording apparatus. The data recording apparatus 800 includes a CPU bus 811, a CPU 801, a ROM 802, a RAM 803, a monitor 805, a keyboard 807, a recording unit, and an I / O. It is the structure where the parts were connected. The monitor 805 is connected to the CPU bus 811 via the video I / F 804, and the keyboard 807 is connected to the CPU bus 811 via the keyboard I / F 806. The recording unit includes a disk array control unit 808 and p hard disk devices 809 as shown in the figure. _-1 ~ 809 _-p It is the composition which consists of. The I / O unit includes q I / O channels 810. _-1 ~ 810 _-q Have
[0003]
In the data recording apparatus having such a configuration, the I / O channel 810 _-i The data input from (i = 1 to q) is input to the disk array control unit 808 via the CPU bus 811 and is controlled by the disk array control unit 808 to be the hard disk device 809. _-1 ~ 809 _-p To be recorded. Also, the hard disk device 809 _-1 ~ 809 _-p Data read from the I / O channel 810 from the disk array controller 808 via the CPU bus 811 _-i (I = 1 to q) and output to the outside.
At this time, data such as a file name for writing or reading is input from the keyboard 807. The data is also stored in the hard disk device 809. _-i ~ 809 _-p The management and control of which address of which address is to be recorded or from which address is to be reproduced is performed by the CPU 801 in accordance with the program and management data recorded in the ROM 802 or RAM 803.
[0004]
FIG. 10 shows another example of a conventional data recording apparatus capable of recording such data.
FIG. 10 is a block diagram showing the configuration of the data recording apparatus. The basic configuration unit is the same as that of the data recording apparatus 800 shown in FIG. 9, but the data recording apparatus 820 in FIG. 10 inputs and outputs via a sub-bus 813 different from the CPU bus 811. Data is transferred. An input / output control unit 812 is provided between the CPU bus 811 and the sub-bus 813 to control data transfer between the two buses.
[0005]
[Problems to be solved by the invention]
However, in the data recording apparatus as described above, it is sufficiently efficient especially when a plurality of data input / output processes such as AV data are performed simultaneously using a plurality of I / O channels. There was a problem that it could not be done.
[0006]
Specifically, in the conventional data recording apparatus as shown in FIG. 9, since the data to be input / output is transferred via the CPU bus, the amount of data that can be transferred is limited by the capacity of the bus. As a result, multiple input / output processes could not be performed at a sufficiently high speed. In addition, the CPU of this data recording apparatus concentrates various processes such as file system management, real-time input / output control, exclusive control during simultaneous writing, address calculation, and free space management. In addition to requiring a complicated program, it was necessary to use a very high performance CPU. Even then, in some cases, the process could not be performed properly.
[0007]
Further, in the data recording apparatus having the configuration shown in FIG. 10, since the bus is divided, the restriction by the bus is relaxed compared with the data recording apparatus in FIG. Since a common bus is used between the hard disk devices, the transfer amount is limited by the bus. Further, the concentration of processing on the CPU is the same, and a complicated program is required for control, and it is necessary to use a very high performance CPU. In addition, there is still a problem that in some cases it cannot be properly processed.
[0008]
Accordingly, an object of the present invention is to provide a data recording apparatus that can input and output data efficiently to the extent that a plurality of large-capacity data such as AV data can be transferred simultaneously.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, for example, processing and data are prevented from being concentrated on some means such as a bus and a CPU. That is, the I / O channel itself is equipped with a CPU so that advanced management and control processes can be performed. This also reduces the burden on the CPU that controls the whole. Exclusive control of each I / O channel that requires centralized management can be performed reliably and efficiently by applying predetermined means to the storage area access means for each I / O channel. did.
[0010]
Accordingly, the data recording apparatus of the present invention is provided corresponding to each of the data recording means having a recording area divided into a plurality of partial areas, and the divided partial areas of the data recording means, to the data recording means. The data is written only for the corresponding partial area, and the data recorded in the data recording means is read based on a plurality of data input / output means for the entire recording area and an input control signal. Input / output management means for instructing each data input / output means to at least write and read data.
[0011]
Preferably, each of the plurality of data input / output means has management data of data recorded in all recording areas of the data recording means, and the input / output management means is one of the data recording means When the recorded contents of the partial area are updated, the management data is updated based on the management data of the data input / output means corresponding to the area where the data is updated for each of the plurality of data input / output means. Instruct.
[0012]
Also preferably, the data recording means includes a plurality of data recording apparatuses and a disk array control means for controlling the plurality of data recording apparatuses so that they can be managed logically in one address space. It is.
[0013]
Specifically, the data recording means is AV data recording means for recording AV data including either or both of audio data and video data, and the data input / output means inputs and outputs the AV data. Do it simultaneously.
[0014]
[Action]
According to the data recording apparatus of the present invention, at the time of data recording, the data input / output management means instructs the predetermined data input / output means to write data, and the data input / output means writes data to the data recording means. . At this time, the data is written into a predetermined area associated with the data input / output means in the plurality of partial areas of the data recording means.
At the time of data reproduction, the input / output management means instructs the predetermined data input / output means to read data, and the data input / output means reads data from the data recording means. At this time, data is read with all recording areas of the data recording means as access targets.
These data recording and reproducing processes are performed independently and simultaneously in a plurality of data input / output means.
[0015]
【Example】
An embodiment of the data recording apparatus of the present invention will be described with reference to FIGS.
The data recording apparatus of this embodiment is a large-capacity data recording apparatus for recording a plurality of digital AV data, and further, an AV capable of simultaneously inputting / outputting a plurality of series of AV data via a plurality of input / output channels. A data recording device for data.
FIG. 1 is a block diagram showing the configuration of the data recording apparatus of the present invention.
The data recording apparatus 100 includes an input / output management unit 110 and n data input / output units 120. _-1 ~ 120 _-n , Disk array control unit 130, and m hard disk drives 150 _-1 ~ 150 _-m Have
[0016]
First, the configuration of each part will be described.
First, the configuration of the input / output management unit 110 will be described with reference to FIG.
FIG. 2 is a block diagram illustrating a configuration of the input / output management unit 110.
The input / output management unit 110 is a main circuit that controls the entire data recording apparatus 100 and is configured by a normal arithmetic processing unit.
The input / output management unit 110 includes a CPU 111, a ROM 112, a RAM 113, a video I / F 114, a monitor 115, a keyboard I / F 116, a keyboard 117, and n serial input / output I / Fs 118. _-1 ~ 118 _-n These are connected via a CPU bus 119 as shown in the figure.
[0017]
The CPU 111 is a normal processor and operates according to a program stored in the ROM 112 or the RAM 113. In this CPU 111, a program for managing file management and file input / output is normally executed, and under this environment, an operator performs data recording and reproduction operations via the monitor 115 and the keyboard 117.
In addition to the above programs, the ROM 112 and the RAM 113 also record device configuration data such as the number n of serial input / output I / Fs 118, management data of recorded AV data, and the like.
[0018]
The monitor 115 is a display unit that performs an input request to the worker, a status display, or management data display, and is connected to the CPU bus 119 via the video I / F 114. The monitor 115 can also display AV data.
The keyboard 117 is an input means for an operator to input work instructions and file names, and is connected to the CPU bus 119 via the keyboard I / F 116.
n serial input / output I / F118 _-1 ~ 118 _-n Is an interface means for instructing input / output of AV data to / from the data input / output unit 120. The n data input / output units 120 _-1 ~ 120 _-n Are connected one-to-one.
[0019]
Next, the configuration of the data input / output unit 120 will be described with reference to FIG.
FIG. 3 is a block diagram illustrating a configuration of the data input / output unit 120.
The data input / output unit 120 includes a CPU 121, a ROM 122, a RAM 123, a serial input / output I / F 124, a video I / F 125, and a SCSI controller 126, which are connected via a bus 127 as shown in the figure.
[0020]
The CPU 121 is a normal processor and operates according to a program stored in the ROM 122 or the RAM 123. The CPU 121 performs real-time control of data input / output between the input / output management unit 110, the disk array control unit 130, and the outside, file system management, address calculation of the disk array control unit 130, free space management, and the like.
In addition to the program, management data of data recorded in the hard disk device 150 is also recorded in the RAM 113.
[0021]
The serial input / output I / F 124 is an interface with the input / output management unit 110, and inputs / outputs control signals to / from the input / output management unit 110. In some cases, playback AV data is output in response to a request from the input / output management unit 110.
The video I / F 125 is an interface for inputting / outputting digital AV data to / from the outside.
The SCSI controller 126 is connected to the hard disk device 150 via the disk array controller 130. _-1 ~ 150 _-m Is an interface for data input and output. When viewed from the data input / output unit 120, a hard disk device 150 composed of m hard disk devices. _-1 ~ 150 _-m Are accessible as one continuous logical address space.
[0022]
Next, the configuration of the disk array control unit 130 will be described with reference to FIG. FIG. 4 is a block diagram showing a configuration of the disk array control unit 130 of the data recording apparatus 100.
The disk array control unit 130 includes a CPU 131 and a first SCSI controller 132. _-1 ~ 132 _-n , First address generator 133, second address generator 134, first crossbar switch 135, first data memory 136, second data memory 137, second crossbar switch 138, and second SCSI controller 139 _-1 ~ 139 _-m Have
[0023]
The CPU 131 is a processor that controls each unit constituting the disk array control unit 130.
The first SCSI controller 132 is an interface for inputting / outputting data to / from the data input / output unit 120, and the n data input / output units 120. _-1 ~ 120 _-n N are provided corresponding to
The first address generator 133 includes a data input / output unit 120. _-1 ~ 120 _-n The address for reading or writing data to / from the first data memory 136 or the second data memory 137 is generated.
[0024]
The second address generator 134 includes a hard disk device 150. _-1 ~ 150 _-m The address for reading or writing data to / from the first data memory 136 or the second data memory 137 is generated.
The first crossbar switch 135 and the second crossbar switch 138 are switches that switch the connection state between the input side and the output side based on the input switching signal. That is, the state in which a-c and b-d are connected to each other and the state in which a-d and bc are connected to each other are appropriately switched according to the input switching signal.
[0025]
The first data memory 136 and the second data memory 137 are memories for temporarily buffering input / output data for each predetermined unit. The addresses generated by the first address generator 133 or the second address generator 134 are selected and input to each memory by the first crossbar switch 135.
The second SCSI controller 139 is an interface for inputting / outputting data to / from the hard disk device 150, and the m hard disk devices 150. _-1 ~ 150 _-m M are provided corresponding to.
[0026]
Next, a basic operation of the data recording apparatus 100 having such a configuration will be described.
First, the internal operation of the disk array control unit 130 will be described.
When data is transferred between the data input / output unit 120 and the hard disk device 150, first, both the first crossbar switch 135 and the second crossbar switch 138 are connected to ac and bd, respectively. Switch so that. In this state, the data input / output unit 120 and the first data memory 136 are connected, and the hard disk device 150 and the second data memory 137 are connected. Therefore, the data input from the data input / output unit 120 is stored in the first data memory 136 based on the address generated by the first address generator 133, and the data read from the hard disk device 150 is stored in the first data generator 136. It is stored in the second data memory 137 based on the address generated by the second address generator 134.
[0027]
Next, when both the first crossbar switch 135 and the second crossbar switch 138 are switched so that ad and bc are connected to each other, the data input / output unit 120 and the second data memory 137 are connected. Then, the hard disk device 150 and the first data memory 136 are connected. Accordingly, in this state, the data read from the first data memory 136 based on the address generated by the second address generator 134 is recorded in the hard disk device 150 via the second SCSI controller 139. . The data read from the second data memory 137 based on the address generated by the first address generator 133 is output to the data input / output unit 120 via the first SCSI controller 132.
[0028]
Thus, in the disk array control unit 130, by appropriately switching the first crossbar switch 135 and the second crossbar switch 138, data transfer between the data input / output unit 120 and the disk array control unit 130, Data transfer between the hard disk device 150 and the disk array control unit 130, that is, data input and output between the data input / output unit 120 and the hard disk device 150 can be performed simultaneously.
[0029]
Next, a data recording operation to the hard disk device 150 in the disk array control unit 130 will be described with reference to FIGS.
FIG. 5 is a diagram illustrating a state in which data is written from the data input / output unit 120 to the first data memory 136 of the disk array control unit 130.
FIG. 6 shows the first data memory 136 of the disk array controller 130 to the hard disk device 150. _-1 ~ 150 _-m It is a figure which shows the state which transfers data.
Here, for the sake of explanation, the data input / output unit 120 includes four data input / output units 120. _-1 ~ 120 _-Four The hard disk device 150 includes eight hard disk devices 150. _-1 ~ 150 _-8 It shall consist of.
[0030]
Four data input / output units 120 _-1 ~ 120 _-Four When data is simultaneously written, as shown in FIG. _-1 ~ 120 _-Four Simultaneously write data into Block 1 to Block 4 of the first data memory 136. When the time Ts elapses, the first crossbar switch 135 and the second crossbar switch 138 are switched as described above, and the first data memory 136 has the hard disk device 150 as shown in FIG. _-1 ~ 150 _-8 Connected to.
Hard disk device 150 from first data memory 136 _-1 ~ 150 _-8 When data transfer is performed, data is written in four steps. The data D11 to D81 are stored in the hard disk device 150 at the first time Ts / 4. _-1 ~ 150 _-8 Write simultaneously. Then, the data D12 to D82 are stored in the hard disk device 150 at the next time Ts / 4. _-1 ~ 150 _-8 Are simultaneously written, and thereafter, the data D13 to D83 and D14 to D84 are similarly written every time Ts / 4. _-1 ~ 150 _-8 Write simultaneously.
[0031]
In the disk array control unit 130 of the data recording apparatus 100 of the present embodiment, data for one channel is divided and recorded in a plurality of disk apparatuses in this way. Hereinafter, this processing is referred to as striping processing.
In the data recording apparatus 100, AV data is transferred from the outside to the data input / output unit 120 and from the data input / output unit 120 to the disk array control unit 130 at a relatively high speed. The writing speed and the reading speed are relatively slow, and there is a possibility that efficient data transfer cannot be performed. Therefore, in the disk array control unit 130 of this embodiment, such striping processing is performed using the first data memory 136 and the second data memory 137 so that data can be efficiently transferred to the hard disk device 150. I have to.
[0032]
Next, a method for managing data recorded in the data recording apparatus 100 will be described with reference to FIGS.
In the data recording apparatus 100 of the present embodiment, a plurality of hard disk devices 150 managed by the disk array control unit 130. _-1 ~ 150 _-m As a whole, the recording unit consisting of forms a logical address space. However, this recording unit is divided into the same number of partitions as the number n of data input / output units 120. Each partition is associated with one data input / output unit 120.
At this time, the size of each partition may be different, but there should be no overlapping areas.
[0033]
Each data input / output unit 120 _-i (I = 1 to n) can write data only to the corresponding partition, and the data input / output unit 120 _-i Data cannot be written to other partitions that do not support (i = 1 to n).
In addition, each data input / output unit 120 _-i When data is written at (i = 1 to n), all the data input / output units 120 _-i ~ 120 _-n Management data of is updated. Thus, each data input / output unit 120 _-i In (i = 1 to n), data can be read from the entire logical space.
[0034]
Specifically, this will be described with reference to FIG.
In the example shown in FIG. 7, the recording area managed by the disk array controller 130 has a logical space from address 0000h to address FFFFh, and addresses 0000h to 3FFFh, addresses 4000h to 7FFFh, addresses 8000h to BFFFh, And it is divided into four partitions P1 to P4 of addresses C000h to FFFFh. Further, each partition has a data input / output unit 120, respectively. _-1 Data input / output device 120 _-2 Data input / output device 120 _-3 , And data input / output device 120 _-Four Is associated with.
[0035]
In the configuration shown in FIG. 7, as shown in FIG. 7A, at the time of data write, each data input / output unit 120 _-1 ~ 120 _-Four Can be written only in the corresponding area. That is, the data input / output unit 120 _-1 In the first partition P1, the data input / output device 120 _-2 The data input / output device 120 is connected to the second partition P2. _-3 In the third partition P3, the data input / output device 120 _-Four Can write data to the fourth partition P4. Data cannot be recorded in other partitions.
When data is read, as shown in FIG. _-1 ~ 120 _-Four Can read data in the entire recording area. That is, each data input / output unit 120 _-i Data recorded in a partition other than the partition corresponding to (i = 1 to 4) can also be read.
[0036]
Multiple data input / output units 120 _-1 ~ 120 _-n In the configuration of the data recording apparatus 100 of this embodiment in which each operates independently, as described above, only the corresponding partition is targeted for data writing, and all recording areas are targeted for data reading. The data input / output unit 120 _-1 ~ 120 _-n Management data of the data input / output unit 120 _-i Data input / output unit 120 other than (i = 1 to n) _-k It is necessary to update the data corresponding to the data recorded with (k = 1 to n, k ≠ i).
[0037]
The management data update process will be described with reference to FIG.
FIG. 8 is a flowchart for explaining the processing of each unit during data recording.
In FIG. 8, the data input / output unit 120 _-1 The above process will be described by exemplifying a case where data is written.
First, when a data write process is instructed, the input / output management unit 110 performs data input / output unit 120. _-1 A data write command is output to (step S1). Based on the command, the data input / output unit 120 _-1 Writes data (step S2). When the data writing is completed, the data input / output unit 120 _-1 Updates the data management information recorded in a predetermined area in the corresponding recording area based on the writing (step S3).
[0038]
The data input / output unit 120 _-1 Inputs a signal to the effect that the writing process has been completed to the input / output management unit 110 (step S4). When the input / output management unit 110 receives the signal, the data input / output unit 120 that has written the data. _-1 Data input / output unit 120 other than _-2 ~ 120 _-Four In addition, the data input / output unit 120 _-1 Each data input / output unit 120 using the management data of _-i A command for updating the management data (i = 2 to 4) is output (step S5). Each data input / output unit 120 _-i (I = 2 to 4), the data input / output unit 120 _-1 Data input / output device 120 recorded in the recording area of _-1 Management data of each data input / output unit 120 based on the management data _-i The management data (i = 2 to 4) is updated (step S6).
[0039]
By performing such processing, it becomes possible to target only the corresponding partition for data writing and target all recording areas for data reading.
[0040]
Next, the operation of the data recording apparatus 100 will be described.
First, an operation when a digital video signal input from the outside is recorded in the data recording apparatus 100 will be described.
First, data such as a file name of AV data to be recorded, a recording time, and a type of data input / output unit 120 to be used are input from the keyboard 117 of the input / output management unit 110, for example. Based on the input data, the input / output management unit 110 displays the data input / output unit 120. _-i It is checked whether or not there is an empty recording area corresponding to (i = 1 to n). If there is a vacancy, the input / output management unit 110 displays the data input / output unit 120. _-i Specify the file name and recording time for, and command recording.
[0041]
Data input / output unit 120 _-i Transfers the unit time (ΔT) of the input digital AV data to the disk array control unit 130 and instructs the start address and size of the logical space in which the data is recorded. The disk array control unit 130 performs the above-described striping process on the data for unit time (ΔT) and outputs the data to the hard disk device 150 _-1 ~ 150 _-m Each hard disk device 150 is written to _-1 ~ 150 _-m A start address, data size, and a write signal are sent to. These signals are transmitted based on the SCSI protocol.
Then, the processing for each unit time (ΔT) is repeated to record all the write data.
[0042]
When the data writing is completed, the data input / output unit 120 that has written the data. _-i The file information (file name, data size, position where data is recorded, etc.) is sent to the hard disk device 150 via the disk array control unit 130. _-1 ~ 150 _-m To record. Further, the data input / output unit 120 _-i Outputs a signal to the input / output management unit 110 indicating that the recording of the digital AV data has been completed.
In the input / output management unit 110, the data input / output unit 120. _-i Data input / output unit 120 other than _-k A file information update command is sent to (k = 1 to n, k ≠ i). Thus, each data input / output unit 120 _-k In (k = 1 to n, k ≠ i), file information is acquired via the disk array control unit 130, and the management data is updated.
[0043]
Next, an operation when the digital video signal recorded in the data recording apparatus 100 is reproduced and output to the outside will be described.
First, data such as the file name of the AV data to be reproduced and the type of data input / output unit 120 to be used are input from the keyboard 117 of the input / output management unit 110, for example. The input / output management unit 110 displays the designated data input / output unit 120. _-i At (i = 1 to n), an AV data reproduction command with the file name is transmitted.
[0044]
Data input / output unit 120 _-i The data input / output unit 120 reads data for unit time (ΔT). _-i Referring to the management data, the disk array control unit 130 is instructed about the read start address and size in the logical space. The disk array control unit 130 stores the data for the striped unit time (ΔT) for the hard disk device 150. _-1 ~ 150 _-m To read from the hard disk device 150 _-1 ~ 150 _-m A start address, a data size, and a read command are sent to each. This command is sent according to the SCSI protocol.
[0045]
Each hard disk device 150 _-1 ~ 150 _-m Outputs data to the disk array controller 130. The disk array controller 130 returns the striped data to one data stream, and the data input / output unit 120 _-i Output to. Data input / output unit 120 _-i Appropriately outputs the data to the outside. Data input / output unit 120 _-i Repeats the process for each unit time (ΔT) until all the recorded contents of the AV data are output, and ends the process when all the data is output.
[0046]
As described above, according to the data recording apparatus of the present embodiment, AV data can be appropriately recorded on a plurality of disk devices. At that time, a plurality of systems of AV data can be input / output simultaneously using a plurality of input / output channels. At this time, since the area on the disk where the write process can be performed is determined for each input / output channel, the exclusive control can be appropriately performed even when a plurality of AV data are simultaneously written. .
Therefore, the data recording apparatus of this embodiment is a data recording apparatus suitable for recording continuous large-capacity data such as AV data.
[0047]
The data recording apparatus of the present invention is not limited to the present embodiment, and various modifications can be made.
For example, each data input / output unit 120 _-i The configuration of (i = 1 to n) is not limited to the present embodiment, and may be arbitrarily changed.
For example, the interface between the data input / output unit 120 and the input / output management unit 110 uses a serial data I / F in this embodiment. This is because most of the data transmission during this period is expected to be a small amount of data such as data indicating a command and a file name. However, in the case where a part of the playback or input AV data as exceptionally shown in this embodiment is displayed on the monitor 115 of the input / output management unit 110 as a sample, the I / F means having a larger transfer data amount It is preferable to use the above, and an arbitrary I / F unit may be provided to have such a configuration.
[0048]
In each data input / output unit 120, one video I / F 125, which is an input / output channel for AV data with the outside, is provided. However, it may be configured to provide a plurality of these. In particular, if the CPU 121 of the data input / output unit 120 is a high-performance CPU and has sufficient processing capability, it is desirable to adopt such a configuration. As a result, the number of video I / Fs to the outside is desirable. Therefore, the device configuration can be simplified.
[0049]
【The invention's effect】
By using the data recording apparatus of the present invention, it is possible to eliminate restrictions on data transfer due to concentration of processing to some means such as a bus and a CPU, so that input / output of a plurality of data through a plurality of I / O channels is possible. Can be performed efficiently. As a result, it is possible to provide a data recording apparatus capable of inputting and outputting data efficiently so that a plurality of systems of data can be transferred simultaneously even when transferring a large amount of data such as AV data.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a data recording apparatus according to an embodiment of the present invention.
2 is a block diagram showing a configuration of an input / output management unit of the data recording apparatus shown in FIG. 1. FIG.
3 is a block diagram showing a configuration of a data input / output unit of the data recording apparatus shown in FIG.
4 is a block diagram showing a configuration of a disk array control unit of the data recording apparatus shown in FIG. 1. FIG.
FIG. 5 is a diagram for explaining striping processing in the data recording apparatus shown in FIG. 1, showing a state in which data is written from the data input / output unit of the data recording apparatus to the first data memory of the disk array control unit; FIG.
6 is a diagram for explaining striping processing in the data recording device shown in FIG. 1, and is a diagram showing a state in which data is written from the first data memory of the disk array control unit of the data recording device to the hard disk device. is there.
7 is a diagram for explaining an access range to a recording area of each of the data input / output units of the data recording apparatus shown in FIG. 1; FIG. FIG. 5B is a diagram showing the correspondence between the data input / output unit and the recording area when reading data.
8 is a flowchart for explaining an operation at the time of data recording in the data recording apparatus shown in FIG.
FIG. 9 is a block diagram showing a first example of a data recording apparatus so far.
FIG. 10 is a block diagram showing a second example of the data recording apparatus so far.
[Explanation of symbols]
100: Data recording device
110: Input / output management unit
111 ... CPU 112 ... ROM
113 ... RAM 114 ... Video I / F
115 ... Monitor 116 ... Keyboard I / F
117 ... Keyboard 118 ... Serial input / output I / F
119 ... CPU bus
120: Data input / output unit
121 ... CPU 122 ... ROM
123 ... RAM 124 ... Serial input / output I / F
125 ... Video I / F 126 ... SCSI controller
127 ... Bus
130: Disk array controller
131 ... CPU
132: First SCSI controller
133: First address generator
134. Second address generator
135: First crossbar switch
136: First data memory
137 ... Second data memory
138 ... second crossbar switch
139 ... Second SCSI controller
150: Hard disk device

Claims (4)

Data recording means having a recording area divided into a plurality of partial areas;
It is provided corresponding to each of the divided partial areas of the data recording means, and data is written to the data recording means only for the corresponding partial areas, and the data recorded in the data recording means is read out. Is a plurality of data input / output means for the entire recording area,
A data recording apparatus comprising input / output management means for instructing each data input / output means to at least write and read data based on an input control signal. The plurality of data input / output means each have management data of data recorded in all recording areas of the data recording means,
The input / output management means corresponds to the area in which the data is updated for each of the plurality of data input / output means when the recording content of any of the partial areas of the data recording means is updated. The data recording apparatus according to claim 1, wherein the management data is instructed to be updated based on management data of the data input / output means. The data recording means is
A plurality of data recording devices;
3. The data recording apparatus according to claim 2, further comprising a disk array control unit that controls the plurality of data recording apparatuses so that they can be managed logically in one address space. The data recording means is AV data recording means for recording AV data including either or both of audio data and video data,
4. The data recording apparatus according to claim 3, wherein the data input / output means inputs and outputs the AV data simultaneously.

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