JPH10224427A - Reading and writing storage for cd-rom server system and cd-rom server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage which can increase its processing speed, can access a large quantity of data and does not need any other exclusive system for production of a CD by answering the device-based data showing a CD-ROM against the device-based inquiry instruction given from a CD-ROM server. SOLUTION: This storage returns the device-based data that seems as if they were a CD-ROM against the device-based inquiry given from a CD-ROM server 1. In a CD-ROM server system where the device is connected, various information storages such as a hard disk drive 3, an MO disk drive 4, etc., are available as the drives which are equivalent to a CD-ROM drive. The server 1 receives a read instruction via a network circuit LAN/WAN and gives a read command to the disk drive connected to an SCSI bus 5. The drive 4 receives a read command from the server 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-ROM server system, and more particularly to a network-compatible CD for reading data from a CD-ROM drive.
A read / write storage device and a CD-ROM server for use in a ROM server system.

[0002]

2. Description of the Related Art Conventionally, the only storage device that can be connected to a CD-ROM server system is a CD-ROM drive. In a CD-ROM server system, C
Data to be read by the D-ROM server has been limited to data on a stamp CD-ROM or data written on a CD-R disc.

[0003]

As described in the prior art, a conventional CD-ROM server system uses a CD-ROM drive as a reading device. Therefore, there is a first problem that only data reading is possible and the processing speed is slow. Further, for the same reason, one CD disk (about 650 M
B) There is a second problem that a larger amount of data cannot be accessed. Finally, CD-ROM
When data to be read by a drive is written on a CD disk, a separate system dedicated to CD creation is required in both the method of creating a stamp CD-ROM and the method of creating a CD-R writing system. There was a third problem. The present invention solves these first to third problems, and provides an HDD (hard disk drive) or an MO that can be connected to a CD-ROM server.
It is a first object of the present invention to provide a read / write storage device such as a (magneto-optical disk) drive (the invention of claims 1 to 4). Also, a CD-ROM having a function of writing data to such a read / write storage device.
It is a second object of the present invention to provide a CD-ROM server system including a ROM server (claims 5 and 6).

[0004]

According to a first aspect of the present invention, there is provided a read / write storage device comprising a CD-ROM connected to a network.
ROM server and CD connected to CD-ROM server
A CD-ROM comprising a ROM drive and a read / write storage device connected to the CD-ROM drive
In the server system, there is provided a response means for responding to the device type inquiry command from the CD-ROM server with device type data representing the CD-ROM.

[0005] In the read / write storage device according to the second aspect, a CD-ROM server connected to a network,
In a CD-ROM server system including a CD-ROM drive connected to a CD-ROM server and a read / write storage device connected to the CD-ROM drive, a plurality of storage media on the read / write storage device are stored. Means are provided for varying the logical sector length by regarding a physical sector as one logical sector.

According to a third aspect of the present invention, there is provided a read / write storage device comprising: a CD-ROM server connected to a network;
In a CD-ROM server system including a CD-ROM drive connected to a CD-ROM server and a read / write storage device connected to the CD-ROM drive, the CD-R server receives instructions from the CD-ROM server.
A response means for responding to an OM-specific command is provided.

According to a fourth aspect of the present invention, in the CD-ROM server system according to the third aspect,
A response means for responding to the device type inquiry command from the CD-ROM server with device type data representing the CD-ROM; and a plurality of physical sectors on a storage medium in the read / write storage device as one logical sector. Means for making the logical sector length variable by considering the sector as a unique sector, and CD-ROM among instructions from the CD-ROM server.
Reply selection means is provided for enabling selection of whether to enable or disable response means for responding to a specific command.

According to a fifth aspect of the present invention, a CD-ROM server connected to a network and a CD-R
CD-ROM drive connected to OM server and CD
A CD-ROM server system comprising a read / write storage device connected to a ROM drive,
Write data sent from the network to CD-
Means for converting to a format specific to ROM is provided.

According to another aspect of the present invention, a CD-ROM server connected to a network and a CD-R
CD-ROM drive connected to OM server and CD
A CD-ROM server system comprising a read / write storage device connected to a ROM drive,
Means is provided for transferring data converted into a format specific to a CD-ROM as write data to a read / write storage device connected to a CD-ROM server.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A read / write storage device and a CD-RO for a CD-ROM server system according to the present invention
An embodiment of the M server will be described in detail with reference to the drawings. The present invention relates to, for example, an HDD (hard disk drive), an MO disk drive, a PD
Each drive (read / write storage device) that can read / write information, such as an (optical disc) drive, a DVD (digital video disc) drive, and an MD (mini disc) drive, is equivalent to a CD-ROM drive (CD-ROM). It has the feature that it can be used as a special drive (in a specific format).

FIG. 1 shows a CD-RO using a read / write storage device and a CD-ROM server of the present invention.
FIG. 2 is a functional block diagram illustrating an example of an embodiment of a main configuration of an M server system. In the figure, 1 is a CD-ROM server, 1a is a format / write controller, 2a to 2c are CD-ROM drives, 3 is a hard disk drive, 4 is an MO (magneto-optical) disk drive, 5 is a SCSI bus, and LAN / WAN is Indicates a network line.

In the CD-ROM server system shown in FIG. 1, the CD-ROM server 1 uses a TCP / IP
And at the same time, a plurality of storage devices, that is, CD-ROM drives 2a to 2c and a hard disk drive 3 via a SCSI bus 5 which is an interface such as SCSI. , MO disk drive 4 and the like are connected as target devices. CD-ROM
The server 1 includes a CPU, a RAM, a ROM, a network controller, a SCSI controller, etc., exchanges information with an external system via a network LAN / WAN, and communicates with each storage device via a SCSI bus 5. It has a function to control the exchange of information as a whole. The format / write controller 1a is a hard disk drive or an MO disk set in the hard disk drive 3 or the MO disk drive 4.
It has a function of setting the format and controlling the write operation when writing data to the disk.
In each of the CD-ROM drives 2a to 2c, data such as a file / directory written in a predetermined CD-ROM format (such as ISO9660) or a CD-R storing data such as a Web homepage is stored.
OM disk is inserted.

The hard disk drive 3 and the MO disk drive 4 have dip switches and the like that can be operated by an operator, and are used to select the function of each drive. Although the hard disk drive 3 and the MO disk drive 4 are shown in FIG. 1 as read / write storage devices, a PD (optical disk) drive, a DVD (digital video disk) drive, an MD
A read / write drive such as a (mini-disc) drive can also be connected, and is not limited to the hard disk drive 3 or the MO disk drive 4 (hereinafter collectively referred to as the read / write storage device of the present invention). . The above is the CD-RO using the read / write storage device and the CD-ROM server of the present invention.
1 is an outline of the configuration and functions of an M server system (hereinafter abbreviated as a CD-ROM server system of the present invention).

The functions and operations unique to the read / write storage device of the present invention are as follows. The hard disk drive 3 and the MO disk drive 4 shown in FIG. 1 are connected to a device information inquiry command (for example, SCSI inquiry command: inqui) from the host.
ry command), the CD-ROM itself
Function to return information as if it is a drive, for example, S
It has a first function of returning the device type in the inquiry data of CSI as "07: CD-ROM" (the invention of claim 1). By the way, in general,
In the case of the hard disk drive 3 or the MO disk drive 4, the original physical sector length is 512 bytes / sector or 1,024 bytes / sector. However, in the read / write storage device of the present invention, sectors having such a physical sector length are logically grouped into four or two sectors, thereby providing a sector having a sector length of 2,048 bytes / sector. It has a second function of treating each sector as a sector and responding to a command from the host (invention 2).

A disk drive (read / write storage device of the present invention) such as a hard disk drive 3 or an MO disk drive 4 is provided with a CD-R from a host.
A third function of responding to an OM-specific command, for example, a read TOC command, based on data written on a medium in a disk drive as information in response to the command in an appropriate format; (The invention of claim 3). Further, the read / write storage device according to the present invention includes the first to third memory devices described above.
Enable each function (CD-RO from the host's point of view)
By providing a dip switch for selecting whether to operate as M) or to invalidate (to operate as a disk drive such as an original hard disk drive or MO disk drive), the operator can set according to the application. It has four functions (the invention of claim 4). In order for the first to fourth functions of the read / write storage device of the present invention to be actually realized, the CD-ROM server of the present invention also requires the following two functions (to be described below). , A fifth function and a sixth function).

In the CD-ROM server system of the present invention shown in FIG.
A disk drive such as the disk drive 4 (the read / write storage device of the present invention) is stored in the CD-ROM server 1
And start this system, CD-RO
The M server 1 has an SCS connected to the SCSI bus 5
I device, ie, CD-ROM drives 2a to 2c
Alternatively, an inquiry command is sequentially issued to the hard disk drive 3 and the MO disk drive 4. In this case, the read / write storage device of the present invention, that is, the disk drive such as the hard disk drive 3 or the MO disk drive 4,
Returns the information as if it were a CD-ROM drive, so that the CD-ROM server 1 recognizes the disk drive as a CD-ROM drive and determines that the corresponding process can be performed. to decide.

When a data read request is issued from the external system through the network line LAN / WAN, the CD-ROM server 1 sends a read command to various information storage devices connected to the SCSI bus 5. Is issued, and the read information is transmitted to the network line L.
Transfer to external system through AN / WAN. In this case, when a read-related command is issued to the read / write storage device of the present invention, that is, an information storage device such as the hard disk drive 3 or the MO disk drive 4, the information storage device stores the read command. Assuming that one sector is 2,048 bytes, the address and transfer length are processed in the unit (second function), and the read information is transferred to the CD-ROM server 1 (third function).
The same applies when a data write request is made from an external system via a network line LAN / WAN,
The ROM server 1 converts the write data transferred from the external system into a format (for example, ISO9660 format) specific to a CD-ROM (fifth format)
Function of).

Then, the converted write information is stored in the SCS
The data is transferred by a write command to various information storage devices such as the hard disk drive 3 and the MO disk drive 4 connected to the I bus 5 (sixth function).
In this case, the read / write storage device of the present invention,
That is, the information storage device such as the hard disk drive 3 or the MO disk drive 4 writes the transmitted write data to the storage medium while dividing it into the original physical sector length of the information storage device. By adding the above functions (first to sixth functions) to the read / write storage device and the CD-ROM server, the read / write storage device and the CD-ROM server of the present invention can be used. Thus, a CD-ROM server system capable of sufficiently responding not only to reading stored data but also to writing data can be realized. The operation of the above-described CD-ROM server system shown in FIG. 1 is shown in a flowchart. First, the flow at the time of initialization is shown in FIG.

FIG. 2 is a flowchart showing the flow of main processing at the time of initialization for the CD-ROM server system of the present invention. In the figure, # 1 to # 4 indicate steps.

In the flow of FIG. 2, steps # 1 and # 3 are performed in the CD-ROM server 1 (the CD-ROM of the present invention).
Step # 2 and Step # 4 show the operation of the disk drive (read / write storage device of the present invention). In step # 1,
The CD-ROM server 1 issues a device type inquiry command to the disk drive. In step # 2, the disk drive returns the device type as "CD-ROM" according to the setting of the dip switch. Step #
In 3, the CD-ROM server 1 issues a command such as a read TOC command specific to the CD-ROM to the disk drive. In step # 4, the disk drive returns information in an appropriate format based on the data written on the disk, and ends the flow of FIG.

As described above, in the read / write storage device (disk drive) of the present invention, the CD-ROM
In response to the inquiry about the device type from the server 1, the device type data is returned as if it were a "CD-ROM". Therefore, the read / write of the present invention
In a CD-ROM server system to which a write storage device is connected, various information storage devices such as a hard disk drive 3 and an MO disk drive 4 can be used as drives equivalent to a CD-ROM drive. Next, a flow at the time of data reading is shown in FIG.

FIG. 3 is a flowchart showing a main processing flow at the time of reading data in the CD-ROM server system of the present invention. In the figure, # 11- #
Reference numeral 18 denotes a step.

In the flow of FIG. 3, steps # 11 to # 12 and steps # 17 to # 18 are performed.
Indicates the operation of the CD-ROM server 1, and indicates step # 1.
Steps 3 to # 16 show the operation of the disk drive. In step # 11, the network line LAN
The CD-ROM server 1 receives the read command through / WAN. In step # 12, a read command is issued to the SCSI-connected disk drive. In step # 13, the disk drive receives a read command from the CD-ROM server 1. Step # 14
To set the address and transfer length of the received read command to 51.
Convert to 2 bytes / sector. At step # 15, the disk drive reads data from the disk. In step # 16, the read data is transferred to the CD-ROM server 1. In step # 17, the CD-ROM server 1 receives data from a disk drive. In step # 18, the CD-ROM server 1 transfers the data to the network LAN / WAN, and ends the flow of FIG.

As described above, in the read / write storage device (disk drive) of the present invention, the CD-ROM
CD-RO for read command from server 1
Convert to a format unique to M. Further, the CD-ROM server 1 of the present invention can also process various information storage devices such as the hard disk drive 3 and the MO disk drive 4 as drives equivalent to the CD-ROM drive. Finally, FIG. 4 shows a flow at the time of data writing.

FIG. 4 is a flowchart showing a main processing flow at the time of data writing in the CD-ROM server system of the present invention. In the figure, # 21- #
26 indicates a step. In the flow of FIG. 4, steps # 21 to # 23 indicate the operation of the CD-ROM server 1, and steps # 24 to # 26 indicate the operation of the disk drive.

In step # 21, the CD-ROM server 1
Receives a write command through the network line LAN / WAN. In step # 22, the CD-ROM server 1 converts the received write data into the ISO9660 format. In step # 23, a write command is issued to the SCSI-connected disk drive. At step # 24, the disk drive receives the write command and the write data from the CD-ROM server 1. In step # 25, the disk drive converts the address and transfer length of the received write command into 512 bytes / sector. In step # 26, data is written to the disk, and the flow of FIG. 4 ends.

As described above, in the read / write storage device (disk drive) of the present invention, the CD-ROM
CD-R for write commands from server 1
Converted to a format specific to OM. Further, the CD-ROM server 1 of the present invention can also process various information storage devices such as the hard disk drive 3 and the MO disk drive 4 as drives equivalent to the CD-ROM drive.

[0028]

According to the read / write storage device of the present invention, the device type data representing the CD-ROM can be returned in response to the device type inquiry command from the CD-ROM server. Therefore, CD-
It becomes possible for the ROM server to recognize the read / write storage device as a CD-ROM drive.

The read / write storage device according to the second aspect has a function of regarding a plurality of physical sectors on the storage medium in the connected read / write storage device as one logical sector. Therefore, the logical sector length can be made variable, and the CD-ROM server can handle the read / write storage device in the same manner as a CD-ROM drive.

According to a third aspect of the present invention, there is provided a read / write storage device comprising:
Response means for responding to a specific command is provided. Therefore, among the instructions from the CD-ROM server,
A sufficient response can be made to a command unique to the ROM.

According to a fourth aspect of the present invention, in the CD-ROM server system according to the third aspect,
Means for responding to a device type inquiry command from a CD-ROM server with a device type representing a CD-ROM, and a plurality of physical sectors on a storage medium in a read / write storage device as one logical sector Means for making the logical sector length variable and CD-
There is provided a reply selecting means for selecting whether to enable or disable the means for replying to a CD-ROM specific command among the commands from the ROM server. Therefore, the original operation of the read / write storage device,
An operation equivalent to a CD-ROM drive can be selected and executed, and if a personal computer or the like is connected as a host, it can be operated as various information storage devices such as a hard disk drive and an MO disk drive. Become.

In the CD-ROM server according to the fifth aspect, the write data sent from the network is stored in the CD-RO server.
Means for converting to a format unique to M is provided. Therefore, it is possible to create data to be written to the read / write storage device according to claims 1 to 4, and it is possible to handle and process the data as a drive equivalent to a CD-ROM drive.

In the CD-ROM server according to claim 6, the CD-ROM server
-Convert the data converted to the ROM-specific format to C
Means are provided for transferring as write data to a read / write storage device connected to the D-ROM server. Therefore, the data transferred from the network can be written to the read / write storage device of the first to fourth aspects.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an example of an embodiment of a main configuration of a CD-ROM server system using a read / write storage device and a CD-ROM server according to the present invention.

FIG. 2 is a flowchart showing a main processing flow at the time of initialization of the CD-ROM server system of the present invention.

FIG. 3 is a flowchart showing a main processing flow at the time of reading data in the CD-ROM server system of the present invention.

FIG. 4 is a flowchart showing a main processing flow at the time of writing data in the CD-ROM server system of the present invention.

[Explanation of symbols]

1 CD-ROM server, 1a format / write controller, 2a-2c CD-ROM drive,
3 Hard disk drive, 4 MO (magneto-optical) disk drive, 5 SCSI bus

Claims (6)

[Claims] 1. A CD-ROM connected to a network
Server and a CD-ROM connected to the CD-ROM server
CD-RO comprising a ROM drive and a read / write storage device connected to the CD-ROM drive
A read / write storage device comprising: an M server system; and a response unit for responding to the device type inquiry command from the CD-ROM server with device type data representing a CD-ROM. 2. A CD-ROM connected to a network
Server and a CD-ROM connected to the CD-ROM server
CD-RO comprising a ROM drive and a read / write storage device connected to the CD-ROM drive
In the M server system, a unit is provided that makes a logical sector length variable by regarding a plurality of physical sectors on a storage medium in the read / write storage device as one logical sector. Read / write storage device. 3. A CD-ROM connected to a network
Server and a CD-ROM connected to the CD-ROM server
CD-RO comprising a ROM drive and a read / write storage device connected to the CD-ROM drive
In the M server system, among the instructions from the CD-ROM server, a CD-ROM
A read / write storage device comprising a response means for responding to a specific command. 4. A CD-ROM server system according to claim 3, wherein: a reply means for replying to the device type inquiry command from the CD-ROM server with device type data representing the CD-ROM; Means for varying the logical sector length by regarding a plurality of physical sectors on the storage medium as one logical sector; and, among instructions from the CD-ROM server, instructions specific to the CD-ROM. A read / write storage device, comprising: a response selection unit capable of selecting whether the response unit that responds to the request is valid or invalid. 5. A CD-ROM connected to a network
Server and a CD-ROM connected to the CD-ROM server
CD-RO comprising a ROM drive and a read / write storage device connected to the CD-ROM drive
In the M server system, the write data sent from the network
A CD-ROM server comprising means for converting a format into a format specific to a D-ROM. 6. A CD-ROM connected to a network
Server and a CD-ROM connected to the CD-ROM server
CD-RO comprising a ROM drive and a read / write storage device connected to the CD-ROM drive
An M server system, comprising: means for transferring data converted into a format specific to a CD-ROM as write data to a read / write storage device connected to the CD-ROM server. -ROM server.