JPH06290002A - Storage device - Google Patents

Abstract

PURPOSE:To make it possible to share one small computer system interface (SCSI) interface port by a main data storing means and a backup storing means by providing this storage device with a switching means. CONSTITUTION:The storage device 1 receives an SCSI command and SCSI data from a host CPU 20 through an SCSI bus 100. The SCSI interface port 2 supplies the received SCSI command to a system controller 3 and supplies the received SCSI data to a switch 6. The switch 6 transfers the SCSI data to a hard disk drive(HDD) 7 as HDD data or to an MD data drive(MDD) 8 constituted of a magneto-optical recording and reproducing device as MDD data in accordance with a control signal generated when the controller 3 receives the SCSI command.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device for storing backup data.

[0002]

2. Description of the Related Art SCSI (Small Computer)
r System Interface) is set as a standard of an interface for connecting a peripheral device in a small computer.

Conventionally, to configure a backup storage device using such a SCSI interface, for example, one SCSI interface port is used for a hard disk drive for main data storage,
Separate SCSI for magneto-optical storage for back-up data
You are using the interface port.

[0004]

The conventional S as described above is used.
The method of configuring the backup storage device using the CSI interface has a problem that the number of ports that can be used by other peripheral devices decreases.

A first object of the present invention is to provide an S having one main data storage means and one backup data storage means.
It is to be able to share the CSI interface port.

A second object of the present invention is to make it possible to copy backup data to a storage means for storing main data regardless of the type of DOS.

[0007]

A first storage device of the present invention comprises a first storage means (for example, hard disk drive 7 in FIG. 1) and a second storage means for backing up the first storage means. A storage unit (for example, the magneto-optical recording / reproducing device 8 in FIG. 1) and a SCSI interface port (for example,
SCSI interface port 2) in Figure 1 and SCS
A switching means for establishing one of a first data path between the I interface port and the first storage means and a second data path between the SCSI interface port and the second storage means (eg, FIG. 1). Switch 6) and a control means (for example, the system controller of FIG. 1) that causes the switching means to establish a path of the first data path and the second data path according to the SCSI command supplied through the SCSI interface port. 2) and are provided.

A second storage device of the present invention comprises a first storage means (for example, the hard disk drive 7 in FIG. 1) and a second storage means for storing backup data of the first storage means according to a directory structure which does not depend on DOS. Storage means (for example, the magneto-optical recording / reproducing apparatus 8 in FIG. 1).

[0009]

In the first storage device of the present invention, SCSI is used.
A first between the interface port and the first storage means
Of the data path and the second data path between the SCSI interface port and the second storage means, the SCS
A path corresponding to the I command is established. Therefore, one SCSI interface port can be shared by the first and second storage means.

In the second storage device of the present invention, the second storage device
Storage means stores the backup data of the first storage means in a directory structure that does not depend on DOS. Therefore, the backup data can be copied to the first storage means even under various different DOS environments.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of a storage device of the present invention. The storage device 1 uses SCSI commands and SCS.
SCSI interface port 2 for sending and receiving I data, system controller 3 for controlling various components in storage device 1, ROM 4 for storing a program for defining the operation of this system controller, and work area for system controller 3 RAM5 and SC
First data path between SI interface port 2 and hard disk drive (HDD) 7, and SCS
I interface port 2 and magneto-optical recording / reproducing device (M
DX) 8 and a switch 6 for establishing either one of the second data paths. The magneto-optical recording / reproducing device 8 is for backup of the hard disk drive 7.

The storage device 1 receives an S from the host CPU 20.
SCSI command and S via CSI bus 100
Receive CSI data. The SCSI interface port 2 supplies the received SCSI command to the system controller 3 and the received SCSI data to the switch 6. The switch 6 establishes one of the first data path and the second data path according to a control signal generated when the system controller 3 receives a SCSI command. Therefore, switch 6
HD the SCSI data according to the SCSI command.
The data is transferred to the hard disk drive 7 as D data, or the SCSI data is transferred to the magneto-optical recording / reproducing device 8 as MDX data.

When the hard disk drive 7 receives a write command as an HDD control signal from the system controller 3, it writes HDD data, that is, SCSI data, to the magnetic hard disk. The magneto-optical recording / reproducing apparatus 8 writes MDX data, that is, SCSI data, on the magneto-optical disk when receiving a write command as an MDX control signal from the system controller 3.

When the hard disk drive 7 receives a read command from the system controller 3 as an HDD control signal, it reads HDD data, that is, SCSI data from the magnetic hard disk, and switches 6
Supply to. When the magneto-optical recording / reproducing apparatus 8 receives a read command as an MDX control signal from the system controller 3, the magneto-optical recording / reproducing apparatus 8 reads MDX data, that is, SCSI data from the magneto-optical disk and supplies it to the switch 6. The switch 6 establishes one of the first data path and the second data path according to a control signal generated based on the SCSI command received by the system controller 3. Therefore, the switch 6 is an SCS.
According to the I command, the HDD data or MDX data is transferred to the SCSI interface port 2 as SCSI data. SCSI interface port 2
Sends SCSI data and SCSI commands to bus 1
00 to the host CPU 20.

FIG. 2 shows an example of the structure of the magneto-optical recording / reproducing apparatus 8 shown in FIG. The magneto-optical recording / reproducing apparatus (M
The DXD) 8 is a system originally developed for use in personal audio equipment (portable type, stationary type, in-vehicle type). Either a (magneto-optical) disc or a hybrid (partial ROM) disc having a read / write (that is, rewrite) area and a read-only area is used as a recording medium in a cartridge. In the case of a read-only type optical disc in which data is recorded by a magnetic field modulation overwrite recording method, a reproduction signal is detected by utilizing a diffraction phenomenon of light in a pit row of a target track, and a read / write type magneto-optical disc is used. In this case, the polarization angle of the reflected light from the target track (car The read signal is detected by detecting the difference in the turning angle. In the case of a hybrid disc, the read signal is detected and read / written by using the diffraction phenomenon of light in the pit row of the target track for the read-only area. For the dual-use area, a reproduction signal is detected by detecting the difference in the polarization angle (Kerr rotation angle) of the reflected light from the target track.

In the magneto-optical recording / reproducing device 8 as described above, in the course of development as a personal audio device, each circuit element is integrated and each mechanical component is optimized, and the size and weight of the entire device are reduced. In addition, low power consumption enables battery operation. Furthermore, it has almost the same storage capacity (120 Mbytes) as the existing 3.5-inch MO disk drive, and the recording medium can be exchanged. It is possible to reduce the manufacturing cost of the device body and recording media,
From the track record of use as a personal audio device,
Reliability is also well proven.

Since the embodiment of FIG. 1 is intended for data backup, a read / write type MO (magneto-optical) disk is used here as the disk 804.
To use as.

In FIG. 2, a magneto-optical disk 804 rotatably driven by a spindle motor 802 is irradiated with a laser beam from an optical pickup 806 to apply a modulation magnetic field according to recording data by a magnetic head 808. Magnetic field modulation overwrite recording is performed along the recording track of the magneto-optical disk 804, and the recording track of the magneto-optical disk 804 is recorded by the optical pickup 80.
Data is reproduced magneto-optically by tracing with laser light by 6.

The optical pickup 806 is composed of a laser light source such as a laser diode, optical components such as a collimator lens, an objective lens, a polarization beam splitter, a cylindrical lens, and a photodetector divided into a predetermined arrangement. Magnetic disk 804
It is positioned by a feed motor 810 at a position facing the magnetic head 808 with the pinch in between.

In the optical pickup 806, when recording data on the magneto-optical disk 804, the magnetic head drive circuit 809 drives the magnetic head 808, and a modulation magnetic field according to the recording data is applied to the magneto-optical disk 804.
Data is recorded by thermomagnetic recording by irradiating the target track of.

Further, the optical pickup 806 detects the focus error by, for example, the astigmatism method by detecting the laser light applied to the target track, and also detects the tracking error by, for example, the push-pull method, and at the same time, the magneto-optical characteristic. When reproducing data from the disk 804, a difference in polarization angle (Kerr rotation angle) of the reflected light from the target track is detected to generate a reproduction signal.

The output of the optical pickup 806 is supplied to the RF circuit 812. The RF circuit 812 extracts the focus error signal and the tracking error signal from the output of the optical pickup 806, and the servo control circuit 814.
And the reproduced signal is binarized and supplied to the address decoder 816. Address decoder 816
Decodes the address from the supplied binarized reproduction signal and outputs it to the EFM / CIRC encoder / decoder 818, and also outputs the binarized reproduction data other than the binarized reproduction data related to the address to the EFM / CIRC. It is supplied to the encoder / decoder 818.

The servo control circuit 814 is composed of, for example, a focus servo control circuit, a tracking servo control circuit, a spindle motor servo control circuit, a sled servo control circuit, and the like.

The focus servo control circuit controls the optical pickup 806 so that the focus error signal becomes zero.
The focus control of the optical system is performed. The tracking servo control circuit controls the feed motor 810 of the optical pickup 806 so that the tracking error signal becomes zero.

Further, the spindle motor servo control circuit drives the spindle motor 80 so as to rotate the magneto-optical disk 804 at a predetermined rotation speed (for example, a constant linear speed).
Control 2 Further, the sled servo control circuit moves the magnetic head 808 and the optical pickup 806 to the target track position of the magneto-optical disk 804 designated by the system controller 820 by the feed motor 810.

EFM / CIRC encoder / decoder 8
Reference numeral 18 denotes an encoding process for error correction, that is, a CI for the data supplied via the interface 800.
RC (Cross Interleave Reed-
In addition to performing the encoding process of Solomon code, the modulation process suitable for recording, that is, EFM (Eight)
to Fourteen Modulation) encoding processing is performed.

EFM / CIRC encoder / decoder 8
The encoded data output from 18 is supplied to the magnetic head drive circuit 809 as recording data. The magnetic head drive circuit 809 drives the magnetic head 804 so as to apply a modulation magnetic field according to the recording data to the magneto-optical disk 804.

When the system controller 820 receives a write command via the interface 800, the system controller 820 controls the recording position on the disk 804 so that the recording data is recorded on the recording track of the magneto-optical disk 804. This recording position is controlled by EFM / CIRC.
The system controller 804 manages the recording position of the encoded data output from the encoder / decoder 818 on the magneto-optical disk 804, and the system controller 820 sends a control signal designating the recording position of the recording track of the magneto-optical disk 804. This is performed by supplying the servo control circuit 814.

At the time of reproduction, the EFM / CIRC encoder / decoder 818 performs EFM demodulation processing on the inputted binarized reproduction data and also performs CIRC decoding processing for error correction to make the interface 800. Output through.

When receiving a read command via the interface 800, the system controller 820 controls the reproduction position with respect to the recording track of the magneto-optical disk 804 so that reproduction data can be continuously obtained. The control of the reproduction position is performed by managing the position of the reproduction data on the disc by the system controller 820 and supplying a control signal designating the reproduction position on the recording track of the magneto-optical disc 804 to the servo control circuit 814. Done.

FIG. 3 shows the external appearance of the storage device 1 shown in FIG. The disk cartridge 804C containing the disk 804 is loaded into the slot 40 of the storage device 1. On the right side of the slot 40, a power button 42 and M
A D (disc) eject button 44 is provided. You can turn the power on and off by operating the power button 42,
When the eject button 44 is operated, the cartridge 8
The disc stored in 04C is ejected.

FIG. 4 shows a software configuration example on the side of the host CPU 20 in FIG. As shown in FIG. 4, CP
Software on the U20 side is a disk operating system (DOS) 21, MDX (magneto-optical recording / reproducing device) _HDD (hard disk drive) driver 2
2, other driver 23, backup software 24
And other application programs 25.

FIG. 5 shows an example of a file format of the magneto-optical recording / reproducing apparatus 8 which is a backup storage means. This file format includes an empty area management table, a registration table, a file management table, and the substance of the file. The free area management table includes a free area start pointer and an empty area end pointer. The registration table includes a registration date, a registration data size, and a pointer to the file management table. The file management table contains path information to files, file names, and file attributes (ASCII / bin /
Visible / invisible / system / user), access right (self, group, system, read, write, execute (exec)
ute)), the size of the file, the date updated, and a pointer to the file entity. FIG. 6 is a specific registration example of the file format shown in FIG. 5, that is, 804 of the magneto-optical disk.
An example of registration is shown below.

FIG. 7 shows the functions of the start pointer and end pointer of the free area management table of FIG. FIG. 7A shows
This is an example of the case where all the data areas of the disk 804 are empty, in which the head pointer indicates the first position of the data area, and the end pointer indicates the last position of the data area. FIG. 7B is an example of a case where the data area of the disk 804 has been registered from the first position to a certain position. The start pointer indicates the next position of the registered area, and the end pointer indicates the end of the data area. Indicates the position of. Figure 7 (c)
Shows an example in the case where the intermediate area of the data area of the disk 804 has been registered, the head pointer indicates the position next to the registered area, and the end pointer indicates the position before the registered area.

8 and 9 show an example of the backup processing procedure of the embodiment shown in FIG. First, the user
The file name and directory path to be backed up are input to the backup software 24 of 20 (step S1). The input in step S1 is a single registration operation, but a plurality of file names and directory paths can be input.

Next, the backup software 24
The magneto-optical disk (MD) 804 of the magneto-optical recording / reproducing device 8 for backup is checked (step S2).
That is, the backup software 22 is MDX_
Check (1) which is one of the SCSI commands indicating the check of the backup MD is sent to the MDX 8 via the HDD driver 22. In this example, the logical unit (1) is MDX. From MDX8, MDX
The status (1) is returned to the backup software 24 via the HDD driver 22. Examples of the status include OK (there is a free size), no disk, and disks of different formats.

Next, the backup software 24
It is determined whether or not there is an error (step S3), and in the case of an error, an instruction to insert the disk 804 in the MDX 8 or an instruction to replace it is given.

When the backup software 24 determines in step 3 that there is no error, it checks the size of the file to be backed up (step S
4). That is, the backup software 24
Instruct the OS 21 to check the file size, and
The XD_HDD driver 22 causes the HDD 7 to output a read command (0), which is one of the SCSI commands. In this example, the logical unit (0) is the HDD. HD
The data (0) read from D7 is MDX_HDD
It is sent to the backup software 24 via the driver 22 and the DOS 21. Data (0) includes file size and other attributes. Note that the size of the file management table is not considered here for simplification.

Next, the backup software 24
It is checked whether the free size of the MD 804 is equal to or larger than the file size (step S5). If the free size of the MD 804 is smaller than the file size, the user is instructed to replace the disk or delete the registered data.

When the backup software 24 determines in step S5 that the free size of the MD 804 is equal to or larger than the file size, it copies the file from the HDD 7 to the MDX 8 (step S6). That is, the backup software 24 instructs the DOS 21 to read the file, and the MXD_HDD driver 22
To output a read command (0), which is one of the SCSI commands, to the HDD 7. The data file read from the HDD 7 is the MDX_HDD driver 22 and DO.
It is supplied to the backup software 24 via S21. Then, the backup software 24 gives an instruction to write the received data file to the MDX 8 to the MDX_HDD driver 22, and the driver 22
Writes the data file to MDX8. MDX8
Upon completion of this writing, returns the status to the backup software 24 via the MDX_HDD driver 22. The process of step S6 is repeated when the capacity of the buffer secured by the backup software 24 is small.

Next, the backup software 24
In step 7 of FIG. 9, it is checked whether the processing has ended normally. If the processing has not ended normally, error processing is performed. If the processing has ended normally, attributes and the like are registered in the file management table in step S8. That is, in step S8, the backup software 24 instructs the MDX_HDD driver 22 to write in the file management table,
The X_HDD driver 22 performs the corresponding writing (1) to the MDX 8. When this writing is completed, the MDX 8 returns the status to the backup software 24 via the MDX_HDD driver 22.

Next, the backup software 24
In step S9, the presence / absence of the next file is checked, and if it is present, the processes in steps S2 to S8 are performed again. If the next file is not present, in step S10 the registration in the registration table and the empty area management table are performed. Update. That is, in step S10, the backup software 24 instructs the MDX_HDD driver 22 to write to the registration table and the free space management table, and the MDX-HDD driver 22 writes the corresponding write (1) to the MDX8. Do it. When this writing is completed, the MDX 8 drives the MDX_HDD driver 22.
The status is returned to the backup software 24 via.

FIG. 10 shows an example of processing for displaying a list of file names on a certain registration date in the embodiment of FIG. First, the user inputs the registration date (step S11).
In response to this, the backup software 24
The registration table is read from X8 (step S12). That is, the backup software 24 executes the step S12.
At the same time, the MDX_HDD driver 22 is instructed to read the registration table, and the MDX_HDD driver 22
Performs the corresponding read (1) from the MDX 8.
The MDX 8 sends the read data and status accordingly to the backup software 24 via the MDX_HDD driver 22. Examples of status responses include OK indicating that there is a registration table, no disk, and different disk formats.

Next, the backup software 24
It is checked whether the requested date is included in the registered dates in the registration table (step S13). If there is no request date, the backup software 24 performs error processing, and if there is a request date, the backup software 24
Reads the file management table of the registration date (step S14). That is, the backup software 24 instructs the MDX_HDD driver 22 to read the file management table of the registration date, and MDX_H
The DD driver 22 performs the read (1) corresponding to the read M
Perform from DX8. The MDX 8 sends the read data, that is, the file management table, to the backup software 24 via the MDX_HDD driver 22. The backup software 24 is the CPU
A file management table is displayed on a display device such as an LCD (liquid crystal display device) connected to 20 (step S15).

Although FIG. 10 shows a processing example for displaying a list of file names on a certain registration date, a file list after a certain registration date can be similarly processed.

FIG. 11 shows an example of processing for recovering a file on a certain registration date in the embodiment of FIG. First, the processes of steps S11 to S14 of FIG. 10 are performed. Then, the backup software 24 creates a directory (step 21). That is, the backup software 24 instructs the DOS 21 to create a directory, and the MDX_HDD driver 22 writes data (0) to the HDD 7 according to this. HD
When this writing is completed, D7 returns the status to the backup software 24 via the MDX_HDD driver 22.

Next, the backup software 24
The file is copied from the MDX 8 to the HDD 7 (step S22). That is, the backup software 24
Instructs the MDX_HDD driver 22 to read the file, and the MXD_HDD driver 22 sends the SCS
The read command (1), which is one of the I commands, is output to the MDX 8. The data file read from the MDX 8 is supplied to the backup software 24 via the MDX_HDD driver 22. Then, the backup software 24 stores the received data file in M
The DOS 21 is instructed to write to the DX 8, and in response to this, the MDX_HDD driver 22 writes the data file to the HDD 7. When the HDD 7 finishes writing the data file, the MDX_HDD driver 2
2 and the DOS 21 to return the status to the backup software 24. The process of step S22 is repeated when the capacity of the buffer secured by the backup software 24 is small.

Next, the backup software 24
In step S23, it is checked whether it is a normal end, and if it is not a normal end, error processing is performed. If the end is normal, the presence or absence of the next file is checked in step S24. Repeat the process.

FIG. 12 shows an example of processing for deleting backup data before a certain registration date in the embodiment of FIG. First, the user inputs the registration date (step S3).
1). In response, the backup software 24
Reads out the registration table and the free space management table from the MDX 8 (step S32). That is, the backup software 24 determines in step S32 that MDX_HD
The D driver 22 is instructed to read the registration table and the free space management table, and the MDX_HDD driver 22
The corresponding reading (1) is performed from the MDX 8. MD
The X8 sends the registration table and the free area management table data read out accordingly to the backup software 24 via the MDX_HDD driver 22.

Next, the backup software 24
Items before the designated registration date are deleted from the table, the table is recreated, and the free space management table is updated (step S33). That is, the backup software 24 is the MDX_HDD
The driver 22 is instructed to write the recreated registration table and free space management table, and the MDX_HDD driver 2
2, MDX8 writes data (1) according to this
Do against. When this writing is completed, the MDX 8 returns the status to the backup software 24 via the MDX_HDD driver 22.

[0051]

According to the first storage device of the present invention, the SC
There is provided switching means for establishing one of a first data path between the SI interface port and the first storage means and a second data path between the SCSI interface port and the second storage means for backup. , S of the first data bus and the second data bus
SC supplied via CSI interface port
Since the path corresponding to the SI command is selected,
Since one SCSI interface port can be shared by the first and second storage means, the number of ports that can be used by other peripheral devices does not decrease, and a compact and low-cost backup storage device can be realized.

According to the second storage device of the present invention, the second storage means for backup of the first storage means stores the backup data of the first storage means according to the directory structure which does not depend on DOS. As a result, the backup data can be copied to the first storage means even under various different DOS environments.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a storage device of the present invention.

FIG. 2 is a block diagram showing a configuration example of a magneto-optical recording / reproducing device 8 of FIG.

FIG. 3 is a perspective view showing an example of an external configuration of the embodiment of FIG.

FIG. 4 is an explanatory diagram showing a software configuration example on the side of a host CPU 20 in FIG.

5 is a diagram showing an example of a file format of the magneto-optical recording / reproducing apparatus 8. FIG.

FIG. 6 is a diagram showing an example of registration of 804 of the magneto-optical disk of FIG.

FIG. 7 is a diagram showing functions of a start pointer and an end pointer of the free space management table of FIG.

FIG. 8 is a flowchart showing a part of an example of a backup processing procedure of the embodiment of FIG.

9 is a flowchart showing a remaining part of an example of a backup processing procedure of the embodiment of FIG.

10 is a flowchart showing an example of processing for displaying a list of file names on a certain registration date in the embodiment of FIG.

FIG. 11 is a flowchart showing a processing example for recovering a file on a certain registration date in the embodiment of FIG.

12 is a flowchart showing an example of processing for deleting backup data before a certain registration date in the embodiment of FIG.

[Explanation of symbols]

 1 Storage Device 2 SCSI Interface Port 3 System Controller 6 Switch 7 Hard Disk Drive (HDD) 8 Magneto-Optical Recording / Reproducing Device (MDX) 20 Host CPU 100 SCSI Bus

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 21, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

A second object of the present invention is to provide a DOS (disk
The purpose is to enable backup data to be copied to a storage means for storing main data, regardless of the type of operation system .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of a storage device of the present invention. The storage device 1 uses SCSI commands and SCS.
SCSI interface port 2 for sending and receiving I data, system controller 3 for controlling various components in storage device 1, ROM 4 for storing a program for defining the operation of this system controller, and work area for system controller 3 RAM5 and SC
First data path between SI interface port 2 and hard disk drive (HDD) 7, and SCS
The I interface port 2 and the magneto-optical recording / reproducing device
And a switch 6 for establishing one of the second data paths with the MD data drive (MDD) 8 configured as described above. The MD data drive 8 is for backup of the hard disk drive 7.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

The storage device 1 receives an S from the host CPU 20.
SCSI command and S via CSI bus 100
Receive CSI data. The SCSI interface port 2 supplies the received SCSI command to the system controller 3 and the received SCSI data to the switch 6. The switch 6 establishes one of the first data path and the second data path according to a control signal generated when the system controller 3 receives a SCSI command. Therefore, switch 6
HD the SCSI data according to the SCSI command.
The data is transferred to the hard disk drive 7 as D data, or the SCSI data is transferred to the magneto-optical recording / reproducing device 8 as MDD data .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

When the hard disk drive 7 receives a write command as an HDD control signal from the system controller 3, it writes HDD data, that is, SCSI data, to the magnetic hard disk. MD data drive
Eve 8, when receiving a write instruction from the system controller 3 as MDD control signal <br/> the MDD Day
Data i.e. writing SCSI data to the magneto-optical disk.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

When the hard disk drive 7 receives a read command from the system controller 3 as an HDD control signal, it reads HDD data, that is, SCSI data from the magnetic hard disk, and switches 6
Supply to. When the MD data drive 8 receives a read command as an MDD control signal from the system controller 3, the MD data drive 8 reads MDD data, that is, SCSI data from the magneto-optical disk and supplies it to the switch 6. The switch 6 establishes one of the first data path and the second data path according to a control signal generated based on the SCSI command received by the system controller 3. Therefore, the switch 6 is an SCS.
In accordance with the I command, the HDD data or MDD data is transferred to the SCSI interface port 2 as SCSI data. SCSI interface port 2
Sends SCSI data and SCSI commands to bus 1
00 to the host CPU 20.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

FIG. 2 shows an example of the configuration of the MD data drive 8 shown in FIG. MD data drive (M
The DD) 8 is an MD (mini device ) originally developed for use in personal audio equipment (portable type, stationary type, in-vehicle type).
This is a system called Disc: trademark , with a diameter of 64 m
m read (playback) -only optical disc, read / write or rewritable MO (magneto-optical) disc, or hybrid (partial ROM) disc having read / write (ie rewritable) and read-only regions, Using a recording medium housed in a cartridge, data is recorded on a MO disc or a hybrid disc by a magnetic field modulation overwrite recording method, and in the case of a read-only type optical disc, a light diffraction phenomenon in a pit row of a target track The read / write signal is detected by utilizing the hybrid disc. In the case of a read / write type magneto-optical disk, the read signal is detected by detecting the difference in the polarization angle (Kerr rotation angle) of the reflected light from the target track. If, for the read-only area,
The reproduced signal is detected by utilizing the light diffraction phenomenon in the pit row of the target track, and the read / write area is reproduced by detecting the difference in the polarization angle (Kerr rotation angle) of the reflected light from the target track. It detects a signal.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

In the MD data drive 8 as described above, in the course of development as a personal audio device, each circuit element is integrated and each mechanical component is optimized, and the overall size and weight of the device is reduced. At the same time, low power consumption enables battery operation. Furthermore, it has almost the same storage capacity (120 Mbytes) as the existing 3.5-inch MO disk drive, and the recording medium can be exchanged. It is possible to reduce the manufacturing cost of the device body and recording media,
From the track record of use as a personal audio device,
Reliability is also well proven.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

FIG. 4 shows a software configuration example on the side of the host CPU 20 in FIG. As shown in FIG. 4, CP
The software on the U20 side is the disk operating system (DOS) 21, MDD (MD data drive ).
B) _HDD (hard disk drive) driver 2
2 , other driver 23, backup software 24
And other application programs 25.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

FIG. 5 shows a backup storage means M.
An example of the file format of the D data drive 8 is shown. This file format includes an empty area management table, a registration table, a file management table, and the substance of the file. The free area management table includes a free area start pointer and an empty area end pointer. The registration table includes a registration date, a registration data size, and a pointer to the file management table. The file management table contains path information to files, file names, and file attributes (ASCII / bin /
Visible / invisible / system / user), access right (self, group, system, read, write, execute (exec)
ute)), the size of the file, the date updated, and a pointer to the file entity. FIG. 6 shows the file format of FIG.
Tsu specific example of registration of bets, i.e. magneto-optical disk 804
An example of registration is shown below.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

Next, the backup software 24
The magneto-optical disk (MD) 804 of the MD data drive 8 for backup is checked (step S2).
That is, the backup software 22 uses MDD_
Check (1) which is one of the SCSI commands indicating the check of the backup MD is sent to the MDD 8 via the HDD driver 22 . In this example, the logical unit (1) is MDD . From MDD8 , MDD
The status (1) is returned to the backup software 24 via the HDD driver 22 . Examples of the status include OK (there is a free size), no disk, and disks of different formats.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

Next, the backup software 24
It is determined whether or not there is an error (step S3), and in the case of an error, an instruction to insert the disk 804 in the MDD 8 or an instruction to replace it is given.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

When the backup software 24 determines in step 3 that there is no error, it checks the size of the file to be backed up (step S
4). That is, the backup software 24
Instructs the file size check for the OS21, M
The DD_HDD driver 22 outputs a read command (0), which is one of SCSI commands, to the HDD 7. In this example, the logical unit (0) is the HDD. HD
The data (0) read from D7 is MDD_HDD
It is sent to the backup software 24 via the driver 22 and the DOS 21. Data (0) includes file size and other attributes. Note that the size of the file management table is not taken into consideration here for simplification.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction content]

The backup software 24
In S5, the free size of MD804 is
If it is judged that it is equal to or larger than the size, the HDD 7MDD8What
FileIs copied (step S6). That is,
The backup software 24 has a function for the DOS 21.
File read instruction,MDD_HDD driver 22
Read command (0), which is one of the SCSI commands from
It is output to the HDD 7. Read from HDD7Day
FileIsMDD_HDD driver 22And DO
Supply to backup software 24 via S21
To be done. Then, the backup software 24
Removeddata fileToMDD8Instructions to write to
ToMDD_HDD driver 22Driver 22
IsMDD8Todata fileWrite.MDD8
When this writing is finished,MDD_HDD dry
22To the backup software 24 via
Returns the status. Note that the process of step S6 is
The capacity of the buffer secured by the software 24 is small
When it is not, it will be repeated.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction content]

Next, the backup software 24
In step 7 of FIG. 9, it is checked whether the processing has ended normally. If the processing has not ended normally, error processing is performed. If the processing has ended normally, attributes and the like are registered in the file management table in step S8. That is, in step S8, the backup software 24 uses the MDD_HDD driver.
22 instruct to write to the file management table , MD
The D_HDD driver 22 performs the corresponding writing (1) on the MDD 8 . When this writing is completed, the MDD 8 returns the status to the backup software 24 via the MDD_HDD driver 22 .

[Procedure Amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

Next, the backup software 24
In step S9, the presence / absence of the next file is checked, and if it is present, the processes in steps S2 to S8 are performed again. If the next file is not present, in step S10 the registration in the registration table and the empty area management table are performed. Update. That is, in step S10, the backup software 24, compared MDD_HDD driver 22 instructs the writing to the registration table and free space management table, MDD_HDD driver 22 writes (1) corresponding to the hand MDD8 . When this writing is completed, the MDD 8 drives the MDD_HDD driver 22.
The status is returned to the backup software 24 via.

[Procedure Amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction content]

FIG. 10 shows a registration in the embodiment of FIG.
An example of processing for displaying a list of file names of days is shown. Well
Instead, the user inputs the registration date (step S11).
In response, the backup software 24MD
D8The registration table is read from (step S12). Sanawa
Then, the backup software 24 executes step S12.
AtMDD_HDD driver 22Registration table for
Instruct to read,MDD_HDD driver 22
Read (1) according to thisMDD8Start from.
MDD8Read the corresponding data and status accordingly.
The taskMDD_HDD driver 22Through the
To the backup software 24. Status response example
Is OK, indicating that there was a registration table, no disk
However, the disk format may be different.

[Procedure Amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction content]

Next, the backup software 24
It is checked whether the requested date is included in the registered dates in the registration table (step S13). If there is no request date, the backup software 24 performs error processing, and if there is a request date, the backup software 24
Reads the file management table of the registration date (step S14). That is, the backup software 24 instructs the MDD_HDD driver 22 to read the file management table of the registration date, and MDD_H
The DD driver 22 performs the read (1) corresponding to the read M
Start from DD8 . The MDD 8 reads the data, that is, the file management table, according to the MDD_HDD
It is sent to the backup software 24 via the IVA 22 . The backup software 24 is the CPU
A file management table is displayed on a display device such as an LCD (liquid crystal display device) connected to 20 (step S15).

[Procedure 18]

[Document name to be amended] Statement

[Name of item to be corrected] 0045

[Correction method] Change

[Correction content]

FIG. 10 shows an example of processing for displaying a list of file names on a certain registration date.
The file list can be similarly processed .

[Procedure Amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction content]

FIG. 11 shows an example of processing for recovering a file on a certain registration date in the embodiment of FIG. First, the processes of steps S11 to S14 of FIG. 10 are performed. Then, the backup software 24 creates a directory (step 21). That is, the backup software 24 instructs the DOS 21 to create a directory, and the MDD_HDD driver 22 writes data (0) to the HDD 7 according to this. HD
When this writing is completed, D7 writes MDD_HDD
The status is returned to the backup software 24 via the driver 22 .

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

Next, the backup software 24
The file is copied from the MDD 8 to the HDD 7 (step S22). That is, the backup software 24
Instructs the MDD_HDD driver 22 to read the file, and the MDD_HDD driver 22 sends the SCS
A read command (1), which is one of the I commands, is output to the MDD 8 . The data file read from the MDD 8 is supplied to the backup software 24 via the MDD_HDD driver 22 . Then, the backup software 24 stores the received data file in M
The DOS 21 is instructed to write to the DD 8, and accordingly, the MDD_HDD driver 22 causes the HDD 7 to write to the HDD 7.
Write the data file . When the HDD 7 finishes writing the data file, the MDD_HDD driver 2
2 and the DOS 21 to return the status to the backup software 24. The process of step S22 is repeated when the capacity of the buffer secured by the backup software 24 is small.

[Procedure correction 21]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction content]

Next, the backup software 24
In step S23, it is checked whether it is a normal end, and if it is not a normal end, error processing is performed. If the end is normal, the presence or absence of the next file is checked in step S24. Repeat the process.

[Procedure correction 22]

[Document name to be amended] Statement

[Correction target item name] 0049

[Correction method] Change

[Correction content]

FIG. 12 shows an example of processing for deleting backup data before a certain registration date in the embodiment of FIG. First, the user inputs the registration date (step S3).
1). In response, the backup software 24
Reads out the registration table and the free area management table from the MDD 8 (step S32). That is, the backup software 24 determines in step S32 that MDD_HD
The D driver 22 is instructed to read the registration table and the free space management table, and the MDD_HDD driver 22
The corresponding reading (1) is performed from the MDD 8 . MD
The D8 sends the registration table and the free space management table data read out accordingly to the backup software 24 via the MDD_HDD driver 22 .

[Procedure amendment 23]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction content]

Next, the backup software 24
Items before the designated registration date are deleted from the table, the table is recreated, and the free space management table is updated (step S33). That is, the backup software 24 is MDD_HDD
The driver 22 is instructed to write the recreated registration table and free space management table, and the MDD_HDD driver 2
2 writes data (1) according to this in MDD8
Do against. When this writing is completed, the MDD 8 returns the status to the backup software 24 via the MDD_HDD driver 22 .

[Procedure correction 24]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] 1 storage device 2 SCSI interface port 3 system controller 6 switch 7 hard disk drive (HDD) 8 MD data drive (MDD) 20 host CPU 100 SCSI bus

[Procedure correction 25]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure Amendment 26]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure Amendment 27]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

[Procedure correction 28]

[Document name to be corrected] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction content]

[Figure 9]

[Procedure correction 29]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

[Procedure amendment 30]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Change

[Correction content]

FIG. 11

[Procedure correction 31]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

[Correction content]

[Fig. 12]

Claims (2)

[Claims] 1. A first storage means, a second storage means for backing up the first storage means, a SCSI interface port, and a connection between the SCSI interface port and the first storage means. A second data path between the SCSI interface port and the second storage means;
Switching means for establishing either one of the data paths, and S supplied through the SCSI interface port of the first data path and the second data path.
A storage device comprising: a control unit that causes the switching unit to establish a path according to a CSI command. 2. A storage device comprising: first storage means; and second storage means for storing backup data of the first storage means according to a directory structure that does not depend on DOS.