JP2000099408A - System and method for managing feeprom disk and recording medium recording control program therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an FEEPROM disk managing system capable of prolonging the service life of a memory even without providing any special circuit inside a disk device. SOLUTION: An FEEPROM disk 306 is composed of three areas of a disk area 401 for storing data blocks to be managed by this filing system, a substitutive page managing area 402 for storing an address block to write the address of the data blocks in the rewritten disk area and a substitutive page area 403 for storing substitutive blocks to write the data blocks to be rewritten. For the read/write request of data block from the filing system to the disk area 401, a device driver provided outside the disk 306 checks the substitutive page managing area 402, judges whether it is the read/write to the disk area 401 or the substitutive page area 403 and performs the read/write control in the relevant area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a FEEPROM disk management system, a method for managing the same, and a recording medium on which a control program is recorded. It is about.

[0002]

2. Description of the Related Art Generally, in a nonvolatile semiconductor memory (for example, FEEPROM), the number of times data is written is determined by a manufacturer, and when a write operation is repeatedly performed in the same area, the data is written in that area. Data reliability cannot be sufficiently obtained. As a technique for solving such a problem, for example, there is a technique described in Japanese Patent Application Laid-Open No. 5-204561.

In this technique, as shown in FIG. 10, in a semiconductor disk (silicon disk) 1 using a flash memory as a storage medium, in addition to a data memory area 8 for storing data in the flash memory, And an error memory area 7 having, as error information, an address of an alternative memory of the data memory in which the error has occurred among the alternative memory areas and the data memory area and the alternative memory area. In addition, a memory controller 5 for writing / reading to / from the error memory area is provided. In FIG. 10, 2 is a host system, 3 is a host bus, 4 is a microcomputer, 9 is an address, 10 is data, and 11 is a control signal.

[0004]

In the prior art shown in FIG. 10, a memory controller 5 for controlling a buffer memory 6, an error memory 7 and a data memory 8 is provided inside a semiconductor disk 1 using a flash memory as a storage medium. The built-in memory controller 5 controls access to the FEEPROM. Therefore, if the memory controller 5 is not mounted in the silicon disk 1, access control of the silicon disk 1 cannot be performed.

An object of the present invention is to provide a special circuit by providing a device driver as the control function without providing a control function such as a memory controller inside, and enabling read / write control by an access function of the device driver. FEE that can extend the life of the memory without providing a memory inside
An object of the present invention is to provide a PROM disk management system, a management method therefor, and a recording medium recording a control program therefor.

[0006]

According to the present invention, there is provided a management system for a FEEPROM disk device using a flash memory as a storage medium, wherein the FEEPROM disk device has a disk area for storing data blocks,
A replacement area for the disk area; and a management area for managing the replacement area. The storage area is provided outside the disk device, is connected to the disk device via a bus, and has a disk area, a replacement area, and a management area. There is provided a management system including control means for performing control.

In response to the access to the disk device, the control means checks the management area to determine whether the access is to the disk area or to the alternative area, Means for making access to an area corresponding to

Further, according to the present invention, a flash memory is constituted by an interface circuit for transmitting and receiving data, a buffer for temporarily storing data when reading and writing data, and a FEEPROM disk for storing data. An information processing system comprising: a FEEPROM disk device; a file system that manages data blocks of the FEEPROM disk; a device driver that controls reading and writing of the FEEPROM disk; and an operating system that controls the file system and the device driver. FEEP in equipment
A ROM disk management system, comprising: the FEEPR
The OM disk includes a disk area for storing the data block, an alternative page management area for storing an address block for writing an address of a data block in the rewritten disk area, and an alternative block for writing a data block for rewriting. An alternative page area to be stored, wherein the device driver checks the alternative page management area in response to accessing a data block from the file system to the disk area, and There is provided a disk management system having means for determining whether access is to an access to an alternative page area and means for accessing the corresponding area.

The device driver includes means for searching for an unused address block in the alternative page management area when an error has occurred in writing to the disk area, and means for searching for an unused address block if an unused address block exists. ,
Means for writing an address of a write request data block to an unused address block of the alternative page management area;
Means for writing to an alternative block in the alternative page area corresponding to the address block in which the address of the write request data block has been written.

The device driver may further comprise means for retrieving an unused address block in the alternative page management area when writing to the alternative page area results in an error. Is
Means for writing a non-writable mark in the address block of the alternative page management area in which the address of the write request data block was written before the search, and writing the address of the write request data block in the corresponding unused address block Means, and means for writing to a substitute block of the substitute page area corresponding to the address block in which the address of the write request data block has been written, and wherein the device driver comprises: If there is no unused address block, a means for notifying the operating system of a write error is provided.

Further, the device driver has means for transmitting a write command and write data to the FEEPROM disk device via a bus.
The EEPROM disk device has means for analyzing the write command and writing the write data in a corresponding area, and means for generating an interrupt in response to the end of the write and notifying the device driver of the write completion. Wherein the device driver has means for transmitting a read command and a read destination address to the FEEPROM disk device via a bus, and the FEEPROM disk device analyzes the read command and the read address. Means for preparing to read data from the corresponding read address, and means for generating an interrupt in response to the completion of the read preparation and notifying the device driver of the completion of the read preparation, wherein the bus driver further comprises: Means for reading data at the corresponding address through the bus It is characterized in.

According to the present invention, an interface circuit for transmitting and receiving data, a buffer for temporarily storing data when reading and writing data, and an FEE for storing data
A FROM disk device comprising a PROM disk and using a flash memory as a storage medium;
A file system that manages data blocks of the PROM disk; a device driver that controls reading and writing of the FEEPROM disk; and an operating system that controls the file system and the device driver. The FEEPROM disk stores the data blocks. It has a disk area for storing, an alternative page management area for storing an address block for writing an address of a data block of the rewritten disk area, and an alternative page area for storing an alternative block for writing a data block to be rewritten. FE in information processing equipment
An EPROM disk management method, wherein in response to accessing a data block from the file system to the disk area, the device driver checks the alternative page management area and accesses the disk area or It is possible to obtain a disk management method characterized in that it is determined whether or not an access is made to an alternative page area, and the area is accessed.

When writing to the disk area results in an error, the device driver searches for an unused address block in the alternative page management area,
If there is an unused address block, the address of the write request data block is written in the unused address block of the alternative page management area, and the replacement page corresponding to the address block in which the address of the write request data block has been written. It is characterized in that writing is performed to a substitute block of an area.

If an error occurs in writing to the alternative page area, the device driver searches for an unused address block in the alternative page management area,
If there is an unused address block, write a non-writable mark in the address block of the alternative page management area where the address of the write request data block has been written before the search, and write the corresponding unused address block. The address of the request data block is written, and writing is performed to a substitute block of the substitute page area corresponding to the address block in which the address of the write request data block has been written.

Further, when there is no unused address block in the substitute page management area, the device driver notifies a write error to the operating system. A write command and write data are transmitted to the FEEPROM disk device via a bus. And generating an interrupt to notify the device driver of the write completion.

The device driver transmits a read command and a read destination address to the FEEPROM disk device via a bus, and
The OM disk device analyzes the read command and the read address, prepares for reading data from the read address, generates an interrupt in response to the completion of the read preparation, and notifies the device driver of the completion of the read preparation, The bus driver reads data of a corresponding address through the bus.

According to the present invention, an interface circuit for transmitting / receiving data, a buffer for temporarily storing data when reading / writing data, and an FEE for storing data.
A FROM disk device comprising a PROM disk and using a flash memory as a storage medium;
A file system that manages data blocks of the PROM disk; a device driver that controls reading and writing of the FEEPROM disk; and an operating system that controls the file system and the device driver. The FEEPROM disk stores the data blocks. It has a disk area for storing, an alternative page management area for storing an address block for writing an address of a data block of the rewritten disk area, and an alternative page area for storing an alternative block for writing a data block to be rewritten. FE in information processing equipment
A recording medium on which a program of an EPROM disk management method is recorded, wherein the program causes the device driver to store the alternative page management area in response to an access to a data block from the file system to the disk area. It is possible to obtain a recording medium characterized in that a check is made to determine whether to access the disk area or the alternative page area, and access to the area is performed.

The operation of the present invention will be described. Without providing a control function such as a memory controller inside the disk device, a device driver, which is the control function, is provided outside, and read / write control can be performed by an access function of the device driver, so that a special circuit is not provided inside. It enables the life of the memory to be extended.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a system incorporating a FEEPROM disk showing one embodiment of the present invention. This system is composed of CPU 101 and R
It includes an AM 102, a ROM 105, and a FEEPROM disk device 106. The RAM 102 is connected to the CPU bus 103, and the ROM 105 and the FEEPROM disk device 106 are connected to the IO bus 104. RAM 102
As shown in FIG. 2, the application program 2
01, an operating system 202, a file system 203, and a device driver 204 are stored.

As shown in FIG. 3, the FEEPROM disk device 106 includes an interface circuit 302 for communicating with the IO bus 104, a buffer memory 303 for temporarily storing data transmitted from the IO bus 104, and a FEEPROM.
ROM disk 306. Buffer memory 303
And the FEEPROM disk 306 are connected to the address bus 30
4 and a data bus 305. And FE
The FEEPROM disk 306 in the EPROM disk device 106 has a disk area 40 as shown in FIG.
1, alternative page management area 402, alternative page area 403
It is designed to be used separately.

Next, the operation of the embodiment of the present invention will be described with reference to the flowcharts of FIGS. 5, 6, 7 and 8. First, referring to FIG.
6 is a flowchart illustrating a method for writing a data block to a disk 306. FEEPROM disk 306
When writing to the disk area 401 of a file, when a file write request is notified from the application program 201 to the file system 203, the file system 203 analyzes the file write request and
The device driver 204 is notified of a write request to the corresponding area of the disk area 401 of the EEPROM disk 306.

The device driver 204 writes data to the FEEPROM disk 306 according to the flowchart of FIG. When a write request is issued from the file system 203 to the disk area 401, the device driver 204 searches whether the address of the write request data block exists in the alternative page management area 402 (process 501), and It is determined whether the address of the write request data block exists in
02).

If the address of the write request data block does not exist in the substitute page management area 402, the contents of the data block are written to the corresponding address of the disk area 401 (process 504). Also, the alternative page management area 402
If the address of the write request data block exists in
The contents of the data block are written to the corresponding substitute block of the substitute page area 403 corresponding to the corresponding address block of the substitute page management area 402 (process 503).

If the writing is successful (process 505), the writing process is terminated. If the writing is an error (process 505), it is determined whether the data is to be written to the disk area 401 (process 506). If a write error has occurred in step (a), an unused address block in the alternative page management area 402 is searched (step 508).

When a write error occurs in the alternative page area 403, a write disable mark is written in the address block of the alternative page management area 402 where the address of the write request data block has been written (process 507), and the alternative page management area 402 The unused address block is searched (step 508).

If there is an unused address block in the substitute page management area 402 (step 509), the address of the write request data block is written to an unused address block in the substitute page management area 402 (step 510).
The contents of the data block are written to the substitute block of the substitute page area 403 corresponding to the address block in which the address of the write request data block of the substitute page management area 402 has been written (process 512).

In the search for an unused address block in the alternative page management area 402 (step 508), if there is no unused address block in the alternative page management area 402 (step 509), writing to the operating system 202 is impossible. Is notified (process 511). The error notification method is optional.

Search the alternative page management area 402 (Process 5)
01), the device driver 204 reads data from the FEEPROM disk device 106 according to the flowchart of FIG. 8, and checks whether the write request block address exists in the alternative page management area 402.

Data reading is performed by the device driver 20.
4 transmits a read command to the FEEPROM disk device 106 (process 801) and transmits a read address (process 802). Device driver 204 is FE
When notified from the EPROM disk device 106 by a read preparation completion interrupt (step 803), data of a required size is read from the corresponding read address (step 804).

The FEEPROM disk device 106 has an IO
The read command and the read address received from the bus 104 are analyzed, and when reading from the FEEPROM disk 306 becomes possible, the CPU 101 notifies the CPU 101 of a read preparation completion interrupt signal. Interface circuit 30
2 stores data stored in the buffer memory 303 via the address bus 304 and the data bus 305 into the IO bus 10
Send to 4.

The writing to the disk area 401, the alternative page management area 402, and the alternative page area is performed according to the flowchart of FIG.
Data is written to the ROM disk device 106. Data writing is performed by the device driver 204 by the FEEPR.
The erase command is transmitted to the OM disk device 106 (process 701) and the erase block address is transmitted (process 702). The device driver 204 is a FEEP
When an erasure completion interrupt is notified from the ROM disk device 106 (process 803), a write command is transmitted (process 70).
4) Transmission of a write address (process 705) and writing of data of a required size to the write address (process 7)
06), when a write completion interrupt is notified from the FEEPROM disk device 106 (process 707), the writing ends.

The FEEPROM disk device 106 has an IO
The erasing command and the erasing block address received from the bus 104 are analyzed, and when the corresponding block of the FEEPROM disk 306 is erased, the CPU 101 notifies the CPU 101 of an erasing completion interrupt signal. Also, a write command,
When the write address is received from the IO bus 104, the interface circuit 302
When the write data is received and the write data is received, it is stored in the buffer memory 303 from the interface circuit 302, and the data is written to the corresponding address on the FEEPROM disk 306 via the address bus 304 and the data bus 305.

When reading from the disk area 401 of the FEEPROM disk 306, when a file reading request is notified from the application program 201 to the file system 203, the file system 203
Analyzes the read request to the file and
The device driver 204 is notified of a read request from a corresponding area of the disk area 401 of the disk 306.

The device driver 204 reads data from the FEEPROM disk 306 according to the flowchart shown in FIG. When a read request is issued from the file system 203 to the disk area 401, the device driver 204 searches whether or not the address of the read request data block exists in the alternative page management area 402 (process 601). It is determined whether or not the address of the read request data block exists (step 602).

If the address of the read request data block does not exist in the substitute page management area 402 (process 60)
2) The contents of the data block are read from the corresponding address in the disk area 401 (process 604). If the address of the read request data block exists in the alternative page management area 402 (process 602), the alternative page management area 4
The content of the data block is read into the corresponding substitute block of the substitute page area 403 corresponding to the corresponding address block of No. 02 (process 603).

When the reading is completed, the device driver 2
04 notifies the file system 203 of the read content (step 605). The notification method of the read content is
Optional. If the device driver 204 is a FEEPRO
The operation when reading and writing from the M disk device 106 is as follows.
This is the same as the writing process to the FEEPROM disk 306.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of one embodiment of the present invention will be described in detail.
First, the FEE in the FEEPROM disk device 106
The PROM disk 306 has an 8 Mbyte (1 Mbyte is 2 to the 20th power byte = 1048576 bytes) FEEP
A total of 64 ROMs are provided. Therefore, FEEPRO
The total storage capacity of the M disk device 106 is 512 Mbytes. Among them, 462 Mbytes are allocated to the disk area 401 of the FEEPROM disk 306 (address 000000000H (H represents hexadecimal notation)).
To 1CDFFFFFH to 512 Mbytes),
The replacement page management area 402 has 100 kbytes (1 kbytes).
Bytes are allocated as 2 10 bytes = 1024 bytes (addresses 1CE0000H to 1CE18FF)
100 Kbytes to address FH), alternative page area 40
3 is allocated 50 Mbytes (address 1CE190
(50 MB from address 00H to address 1FFFFFFFFH).

In this system, the unit of writing per page of the FEEPROM disk 306 is arbitrary, and the size of a block requested to be written by the file system at one time is 2048 bytes. In this system, FEE
Writing to the substitute page area 403 of the PROM disk 306 is performed in units of a write request block size per one time from the file system 203, so that writing is performed in units of 2048 bytes. For example, to manage blocks in units of 2048 bytes, data block 0 is 000000
From address 000H to address 000007FFH, data block 2 is from address 0000000800H to address 00000FFF
Address H Therefore, in this device, the total number of blocks that can be replaced when a write error occurs is 25,000 blocks.

In FIG. 9, the disk area 401 of the FEEPROM disk 306 is transferred from the file system 203.
When a write request is issued to data block 0 (address 0000000000H) of the device driver 204, the processing is performed according to the flowchart of FIG.
Is the address of the write request data block 000000
0H searches the contents of the address block in the alternative page management area 402 (process 501), and
2 is the address 000000 of the write request data block
It is determined whether 00H exists (process 502).

Since the address 00000000H of the write request data block exists in the alternative page management area 402 in the address block 0 of the alternative page management area 402, the data block is written in the alternative page management area 4
Alternate page area 4 corresponding to address block 0 of 02
Write to the alternative block 0 of 03.

Similarly, when a write request is issued to data block 1 (address 00000800H) of disk area 401, data is written to data block 1 of disk area 401. Disk area 40
When a write request is issued to the first data block 2 (address 00001000H), the device driver 204 writes the address 00 of the write request data block.
001000H searches the contents of the address block in the substitute page management area 402 (process 501), and writes the address 0 of the write request data block to the substitute page management area 402.
0001000H is determined (processing 50
2).

Since the address 00001000H of the write request data block exists in the alternative page management area 402 in the address block 1 of the alternative page management area 402, the data block is written in the alternative page management area 4
Alternate page area 4 corresponding to address block 1 of 02
03 is written to the alternative block 1.

Here, if the writing is an error, the write disable mark FFFFFFFEH is written to the address block 1 of the alternative page management area 402 (processing 507), and an unused address block of the alternative page management area 402 is searched (processing 508). In FIG. 9, the alternative page management area 40
If the address block 2 of the second page is unused, the address 00001000H of the write request data block is written into the address block 2 of the alternative page management area 402 (processing 510), and the alternative page area corresponding to the address block 2 of the alternative page management area 402 Alternative block 2 for 403
Then, the contents of the data block 2 are written into (step 512).

In FIG. 9, the disk area 401 of the FEEPROM disk 306 is transferred from the file system 203.
When a read request is issued to data block 0 (address 0000000000H) of the device driver 204, the processing is performed according to the flowchart of FIG.
Is the address 000000 of the read request data block
00H searches the contents of the address block in the alternative page management area 402 (step 601), and
02 to address 00000 of read request data block
It is determined whether 000H exists (process 602).

Since the address 000000000H of the read request data block exists in the alternative page management area 402 at the address block 0 of the alternative page management area 402, the data block reading corresponds to the address block 0 of the alternative page management area 302. Reading is performed from the replacement block 0 of the replacement page area 403 thus set. Similarly, when a read request is issued for the data block 1 (address 00000800H) of the disk area 401, the data is read from the data block 1 of the disk area 401.

The processing in the flowcharts of FIGS. 5 to 8 can be configured to be executed based on a control program stored in a storage medium in advance.

[0047]

As described above, in the present invention,
FEEP without any special circuit inside the disk drive
Since the life of the ROM disk can be extended, the following effects can be obtained. That is, when changing from a hard disk drive to a FEEPROM disk,
Operation is possible only by newly incorporating a device driver, and reusability at the software level is improved. Also,
Since no special circuit is required, the number of components in the entire system is reduced, and the reliability can be improved as compared with the conventional system.

[Brief description of the drawings]

FIG. 1 is a block diagram of a system equipped with a FEEPROM disk device showing one embodiment of the present invention.

FIG. 2 is a block diagram of a program that operates in a RAM shown in FIG. 1;

FIG. 3 is a diagram showing a configuration inside the FEEPROM disk device shown in FIG. 1;

FIG. 4 is a diagram showing a configuration of a FEEPROM disk shown in FIG. 3;

FIG. 5 is a flowchart showing a method for writing to an EEPROM disk.

FIG. 6 is a flowchart showing a method of reading data from a FEEPROM disk.

FIG. 7 is a flowchart showing a writing method for one block of the FEEPROM disk.

FIG. 8 is a flowchart showing a reading method for one block of the FEEPROM disk.

FIG. 9 is a diagram showing a configuration of a FEEPROM disk in an embodiment.

FIG. 10 is a block diagram showing a conventional example.

[Explanation of symbols]

 101 CPU 102 RAM 103 CPU bus 104 IO bus 105 ROM 106 FEEPROM disk device 201 application program 202 operating system 203 file system 204 device driver 301 interrupt signal 302 interface circuit 303 buffer memory 304 address bus 305 data bus 306 FEEPROM disk 401 disk area 402 Alternative page management area 403 Alternative page area

Continuation of the front page (72) Inventor Junji Takahashi 1-403 Kosugi-cho, Nakahara-ku, Kawasaki-shi, Kanagawa F-term in NEC Telecom System Corporation (reference) 5B018 GA06 KA14 MA22 NA06 QA16 5B025 AA01 AC01 AD04 AE08 5B065 BA05 EA11

Claims (15)

[Claims] 1. An FE using a flash memory as a storage medium
A management system for an EPROM disk device, wherein the FEEPROM disk device has a disk area for storing a data block, an alternative area for the disk area, and a management area for managing the alternative area. A management system comprising a control means provided externally, connected to the disk device via a bus, and controlling the disk area, the replacement area, and the management area. 2. In response to an access to the disk device, the control unit checks the management area to determine whether the access is to the disk area or to the alternative area, and the check result 2. A management system according to claim 1, further comprising means for accessing an area corresponding to the information. 3. An FE using a flash memory as a storage medium, comprising an interface circuit for transmitting and receiving data, a buffer for temporarily storing data when reading and writing data, and a FEEPROM disk for storing data.
An information processing apparatus comprising: an EPROM disk device; a file system that manages data blocks of the FEEPROM disk; a device driver that controls reading and writing of the FEEPROM disk; and an operating system that controls the file system and the device driver. A FEEPROM disk management system, wherein the FEEPROM disk has a disk area for storing the data block, an alternative page management area for storing an address block for writing an address of a data block of the rewritten disk area, and a rewrite operation. And a replacement page area storing a replacement block in which a data block to be written is written. The device driver further comprises: a data block from the file system to the disk area. Means for checking the alternative page management area in response to the access to determine whether the access is to the disk area or the alternative page area, and means for accessing the corresponding area A disk management system characterized by the following. 4. The device driver according to claim 1, wherein when an error occurs in writing to said disk area, said device driver searches for an unused address block in said alternative page management area. Means for writing the address of a write request data block to an unused address block of the alternative page management area, and writing to an alternative block of the alternative page area corresponding to the address block in which the address of the write request data block has been written. And means for performing the operation.
A disk management system as described. 5. The device driver according to claim 1, further comprising: a unit configured to search for an unused address block in the alternative page management area when an error occurs in writing to the alternative page area; and when an unused address block exists. Means for writing a non-writable mark in the address block of the alternative page management area in which the address of the write request data block was written before the search, and adding the address of the write request data block to the corresponding unused address block. 5. The disk management system according to claim 3, further comprising means for writing, and means for writing to a substitute block in the substitute page area corresponding to the address block in which the address of the write request data block has been written. . 6. The device driver according to claim 3, wherein said device driver has means for notifying a write error to said operating system when there is no unused address block in said alternative page management area. A disk management system as described. 7. The device driver includes means for transmitting a write command and write data to the FEEPROM disk device via a bus, wherein the FEEPROM disk device analyzes the write command and writes the write data. The disk management according to any one of claims 3 to 6, further comprising: means for writing to the corresponding area; and means for generating an interrupt in response to the end of the writing and notifying the device driver of the completion of the writing. system. 8. The device driver, comprising: means for transmitting a read command and a read destination address to the FEEPROM disk device via a bus.
The EEPROM disk device analyzes a read command and a read address and prepares to read data from the read address. In response to the completion of the read preparation, an interrupt is generated to notify the device driver of the read preparation completion. Means, and the bus driver,
8. The disk management system according to claim 3, further comprising means for reading data at a corresponding address through said bus. 9. An FE which includes an interface circuit for transmitting and receiving data, a buffer for temporarily storing data when reading and writing data, and a FEEPROM disk for storing data, and uses a flash memory as a storage medium.
An EPROM disk device; a file system that manages data blocks of the FEEPROM disk; a device driver that controls reading and writing of the FEEPROM disk; and an operating system that controls the file system and the device driver. Stores a disk area for storing the data block, an alternative page management area for storing an address block for writing an address of a data block in the rewritten disk area, and an alternative block for writing a data block for rewriting. A method of managing an FEEPROM disk in an information processing apparatus having an alternative page area, the method comprising: responding to an access to a data block from the file system to the disk area; A disk driver that checks the alternative page management area, determines whether to access the disk area or access to the alternative page area, and accesses the corresponding area. . 10. When writing to the disk area results in an error, the device driver searches for an unused address block in the alternative page management area, and when there is an unused address block, the device driver The address of the write request data block is written to an unused address block of the replacement page management area, and the writing is performed to the replacement block of the replacement page area corresponding to the address block in which the address of the write request data block is written. 10. The disk management method according to claim 9, wherein: 11. When an error occurs in writing to the alternative page area, the device driver searches for an unused address block in the alternative page management area, and when an unused address block exists, A write disable mark is written in the address block of the alternative page management area where the address of the write request data block was written before the search, and the address of the write request data block is written in the corresponding unused address block. 10. The writing method according to claim 9, wherein writing is performed to a replacement block in the replacement page area corresponding to the address block in which the address of the block is written.
0. A disk management method according to item 0. 12. The device driver according to claim 9, wherein when there is no unused address block in the substitute page management area, the device driver notifies the operating system of a write error. Disk management method described. 13. The FEEPROM, wherein the device driver transmits a write command and write data to the FEEPROM disk device via a bus.
The disk device analyzes the write command, writes the write data in a corresponding area, generates an interrupt in response to the end of the write, and notifies the device driver of the write completion. Claim 9-
13. The disk management method according to any one of 12. 14. The FEEPRO, wherein the device driver transmits a read command and a read destination address to the FEEPROM disk device via a bus.
The M disk device analyzes the read command and the read address, prepares to read data from the read address, generates an interrupt in response to the completion of the read preparation, and notifies the device driver of the completion of the read preparation,
14. The disk management method according to claim 9, wherein said bus driver reads data of a corresponding address through said bus. 15. An F / F which includes an interface circuit for transmitting / receiving data, a buffer for temporarily storing data when reading / writing data, and a FEEPROM disk for storing data, and uses a flash memory as a storage medium.
An EEPROM disk device, a file system that manages data blocks of the FEEPROM disk, a device driver that controls reading and writing of the FEEPROM disk, and an operating system that controls the file system and the device driver. Stores a disk area for storing the data block, an alternative page management area for storing an address block for writing an address of a data block in the rewritten disk area, and an alternative block for writing a data block for rewriting. A recording medium on which a program for a FEEPROM disk management method in an information processing apparatus having an alternative page area is recorded, wherein the program stores the disk area from the file system. In response to the access to the data block, the device driver checks the alternative page management area, determines whether to access the disk area or the alternative page area, and accesses the corresponding area. A recording medium characterized by performing the following.