JP3366184B2 - Method and apparatus for accelerating access to a plurality of CD-ROMs - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a plurality of CD-ROs.
A method for accelerating access to M, particularly a plurality of CDs having a path table and file name data management function
-A method for speeding up access to ROM.

[0002]

2. Description of the Related Art Conventionally, this type of file access method for a CD-ROM has been used in order to access a file in a CD-ROM medium at high speed and improve processing efficiency from a program.

An example of a conventional file access method for a CD-ROM is described in Japanese Patent Laid-Open No. 5-313834. The file access method for the CD-ROM described in this publication acquires the addresses of all directories from the path table of the CD-ROM medium and buffers them, and the storage addresses of all files are accessed by the directory access by the buffered addresses. It acquires and buffers and accesses the specified file using the buffered file storage address.

As described above, in the method described in the above publication, the path table (directory management part) and the file address management part are separated on the buffer, which allows access to an arbitrary file. In addition, the address conversion time always occurs, which leads to a delay.

Further, the method described in the above publication does not support the case where there are a plurality of CD-ROM devices to be accessed, and therefore cannot be applied to a system including a plurality of CD-ROMs.

[0006]

In the conventional method as described in the above publication, it is impossible to manage a plurality of CD-ROM devices as one unit, so that the CD-ROMs set in a plurality of CD-ROM devices are not managed. There is a problem that the program must individually specify the files in the medium.

Further, in the conventional method described in the above publication, when reading a file from a CD-ROM medium, access is made from the beginning of the path table and the sector number of the target file directory is fetched, Next, since the procedure for accessing the file by fetching the sector number of the target file from the corresponding directory is taken, there is a problem that the access to the CD-ROM medium is slow.

Therefore, the present invention has been made in view of the above-mentioned problems, and a plurality of CD-ROM devices or auto-changer type CD-ROM devices connected to an information processing device such as a personal computer are virtually used. By providing an interface for recognizing as one CD-ROM device (one CD-ROM), a method and device for speeding up access to a plurality of CD-ROMs that can speed up file access are provided. The purpose is to provide.

[0009]

In order to achieve the above-mentioned object, the present invention comprises a plurality of CD-ROM devices connected to each other.
Access to multiple CD-ROMs in the information processing device
A method for speeding up the process, comprising : (a) monitoring whether the door of the CD-ROM device is opened or closed; and (b) the CD.
-If it is detected whether the door of the ROM device is open or closed,
C of the CD-ROM medium set in the CD-ROM device
Reading the D-ROM medium name; (c) the CD-ROM medium name loaded in the memory;
The step of comparing the CD-ROM medium name read in step (b) with (d) the result of the comparison in step (c),
The name of the CD-ROM medium loaded in the memory and the previous
If the name of the read CD-ROM medium does not match
, The CD-ROM of the set CD-ROM medium
Set the device name and the CD-ROM medium name to the root directory information.
It is expanded on the memory as a report and the root directory
Directory information and file name for files directly under
And the sector number are expanded on the memory and the root directory is
Subdirectories under the directory
Re name and sector number, characterized in that it comprises the steps of: deploying to the memory.

Further, according to the method for speeding up access to a plurality of CD-ROMs according to the present invention, when the information processing apparatus is started up, the plurality of CD-ROM apparatuses connected to the CD-ROM apparatus from the first CD-ROM apparatus to the last CD-ROM apparatus are connected. The steps (b) to (d) may be sequentially executed up to the CD-ROM device.

Further, the present invention relates to an information processing device to which an autochanger type CD-ROM device is connected.
It is a method for speeding up access to multiple CD-ROMs.
Te, CD-R set in the (b) the CD-ROM device
Reading the CD-ROM medium name of the OM medium; and (c) comparing the CD-ROM medium name developed in the memory with the CD-ROM medium name read in step (b). , (D) in step (c) above
As a result of the comparison, the CD-RO loaded in the memory is
M medium name and the read CD-ROM medium name
If the two do not match, the CD-ROM media of the set
Set the CD-ROM device name and the CD-ROM medium name to the root directory.
It is expanded in the memory as directory information and the route
About the files directly under the directory
Information, file name and sector number are expanded on the memory
The subdirectories directly under the root directory.
Subdirectory name and sector number to the memory
Characterized in that it comprises the steps of deploying the. According to the present invention, in an information processing device in which a plurality of CD-ROM devices are connected to a main body device, a CD-ROM access middleware control means is provided between a program for requesting access to a CD-ROM and a CD-ROM driver. ,
The CD-ROM access middleware control means includes program interface means for interfacing with the program, sector management means, and CD-ROM driver control means, and the sector management means is a memory of the information processing device. A function to dynamically secure the upper area and a CD-R for the area secured on the memory.
A device / file / sector table management means having a device name of the CD-ROM device in which the OM medium is set, a function of expanding all information of files and directories, and a file name requested by the program are provided. Is a CD based on the sector information expanded on the memory.
-The files on the ROM medium can be directly accessed, and the CD-ROM driver control means always sets the CD-ROM medium in response to the presence / absence of opening / closing of the door for the plurality of CD-ROM devices. If it is confirmed that the CD-ROM medium is set, the sector management means is notified of the CD-ROM device name, and on the other hand, the removal of the CD-ROM medium from the CD-ROM device is confirmed. Then, the CD-
CD-ROM set recognition means for notifying the ROM device name and sector number from the sector management means, and C
File access means for reading the contents of the file from the D-ROM medium.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, the best mode for carrying out the present invention is to provide a plurality of CD-ROM access middleware 100 between a program 110 and a CD-ROM driver 120 in a personal computer main body 170. , This multiple CD-ROM access middleware 10
The device / file / sector table management means 212 of the sector management means 210 of 0 has a function of dynamically allocating an area on the memory 130, and a CD-ROM medium is set to the area secured on the memory 130. CD-R
The OM device name, the function of expanding all information of files and directories, and the like are provided so that the file name requested by the program 110 is based on the sector information expanded on the memory 130. CD-ROM
Make the files on the media directly accessible.

Multiple CD-ROM access middleware 1
00-CD-ROM driver control means 220 CD-R
The OM set recognition means 221 always uses a plurality of CD-ROMs.
CD-RO triggered by whether the door is opened or closed
Whether or not the M medium is set is monitored, and when it is confirmed that the CD-ROM medium is set, the sector management means 210 is notified of the CD-ROM device name. As a result, the device / file / sector table management unit 212 of the sector management unit 210 expands the information in the CD-ROM medium from the designated CD-ROM device to the memory 130. When it is confirmed that the CD-ROM medium is taken out from the CD-ROM device, the sector management means 21 is similarly operated.
Notify 0 of the CD-ROM device name. As a result, the sector management means 210 causes the C-ROM of the designated CD-ROM device.
The information in the D-ROM medium is deleted from the memory 130.
The file access means 222 of the CD-ROM driver control means 220 receives the sector number from the sector management means 210 and reads the contents of the file from the CD-ROM medium.

Referring to FIGS. 4 and 5, multiple CD-Rs
Sector management means 21 of OM access middleware 100
0 device / file / sector table management means 212
Sets the CD-ROM device name and the CD-ROM medium name in the table on the memory 130 as root directory information (step 410), and sets the directory information, file name and sector number for the file directly under the root directory on the memory 130. set to the table (step 411), directory directly under the root directory
The directory name and sector number of the folder are expanded in the memory 130 (step 412).

Thereafter, the information under the directory expanded in the memory 130 in step 412 described above is set to C.
Read from D-ROM medium (step 420), di
It is confirmed whether or not the file exists under the directory (step 430). In step 430, directory
If it is confirmed that the file exists under the directory, the file name and the sector number of each file is set to the memory table 130 (step 431),
On the other hand, if the existence of the file is not confirmed, the process proceeds to step 440, and it is confirmed whether or not the directory exists under the directory expanded in the memory in step 412 described above.

If it is confirmed in step 440 that the directory exists under the directory, a chain under the parent directory on the memory, that is, the sector number of the parent directory is rewritten to the memory address (step 442), di directly under the parent directory
The directory name and the sector number of the directory are expanded in the memory 130 (step 443), and the start and end addresses on the memory of the file and the directory immediately below the parent directory expanded in the table on the memory 130 are acquired and the memory of the parent directory is acquired. It is set in the internal logical address area (step 444). After step 444 is completed, the process moves to the processing of the child directory immediately below the parent directory (step 445).

On the other hand, steps 430 and 440
If it is confirmed that neither the file nor the directory exists in the step (1), the "NULL" information is set (step 441), and then the process moves to another directory at the same level as the parent directory (step 45).
0). After step 450 is completed, it is confirmed that all directories have been processed (step 460). If not completed, the process returns to step 420, and if completed, all the processes are completed.

[0019]

EXAMPLES Next, in order to describe the above-described embodiments of the present invention more specifically, examples thereof will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an overall configuration of hardware (H / W) which is a premise of one embodiment of the present invention. Figure 1
As shown in FIG. 3, in one embodiment of the present invention, three CD-ROM devices 140, 150 and 160 are connected to a personal computer main body 170 which is an information processing device. Thus, in the present invention, the CD-ROM
Particularly effective when two or more devices are connected.

Referring to FIG. 1, in this embodiment, a plurality of CD-ROM access middleware 100 are added to the conventionally operating program 110, CD-ROM driver 120 and memory 130 in the relationship shown in the figure. To do.

That is, the program 110 and the CD-RO
Without changing the conventional method of directly exchanging data with the M driver 120, the program 110 and the CD
By providing a plurality of CD-ROM access middleware 100 between the ROM driver 120 and the program 110, the three CD-ROM devices 140, 150 and 160 can be recognized as one device by the program 110. File access is performed by the method described above using a plurality of CD-ROM devices as one device.

Multiple CD-ROM access middleware 1
00 receives the file name from the program 110,
The device name in which the file exists is retrieved from the table on the memory 130 and passed to the CD-ROM driver 120.
After that, multiple CD-ROM access middleware 100
Receives the content of the file from the CD-ROM driver 120 and returns it to the program 110.

FIG. 2 is a functional block diagram showing a detailed structure of the plural CD-ROM access middleware 100 shown in FIG. Referring to FIG. 2, the plural CD-ROM access middleware 100 includes a program I / F (interface) unit 200, a sector management unit 210, and a CD.
-ROM driver control means 220 and initial startup setting means 230.

The program I / F means 200 acquires the file name from the program 100 and returns the contents of the file.

The sector management means 210 comprises a memory control means 211 and a device / file / sector table management means 2.
It consists of 12. The memory control unit 211 secures a table (file name / sector number, etc.) area on the memory 130. The device / file / sector table management means 212 creates a device name, a directory name and its sector number, a file name and its sector number as a table in an area secured on the memory 130.

The CD-ROM driver control means 220 is
It comprises a CD-ROM set recognition means 221 and a file access means 222. The CD-ROM set recognition means 221 is a CD connected to the personal computer main body 170 when the operating system (O / S) of the personal computer main body 170 is started up.
-Check the number of ROM devices and monitor whether the CD-ROM medium is set in the CD-ROM device. The file access unit 222 transfers the CD-ROM device name and sector number to the CD-ROM driver 120 and acquires the contents of the file.

The initial start-up setting means 230 is a CD-ROM from the start-up of the personal computer main body 170.
Considering that the door of the CD-ROM device is not opened and closed when the CD-ROM medium is set in the devices 140, 150 and 160, the operating system (O
/ S) is started up, a plurality of CD-ROM devices are sequentially accessed from the first CD-ROM device to the last CD-ROM device, and if a CD-ROM medium is set in the CD-ROM device, , Device / file / sector table management means 212 is called.

Next, the operation of this embodiment will be described.

FIG. 3 is a flow chart for explaining the operation of the CD-ROM set recognizing means 221 shown in FIG. Referring to FIG. 3, the CD-ROM set recognition means 221 constantly monitors the opening and closing of the door of the CD-ROM device (step 310). When the opening / closing of the door of the CD-ROM device is confirmed, the CD-ROM medium name of the CD-ROM medium set in the corresponding CD-ROM device is read (step 320).

In step 320, the name of the CD-ROM device whose door has been opened / closed is already expanded in the memory 130,
If the CD-ROM medium name that has been expanded in the memory 130 matches the set CD-ROM medium name, the process returns to the CD-ROM device open / close monitoring state in step 310. On the other hand, if the CD-ROM device name with the door opened / closed is not yet expanded in the memory 130, or the CD-ROM device name with the door opened / closed is already stored in the memory 130.
CD-ROM which is present in the memory but has already been expanded in the memory 130
If the medium name does not match the set CD-ROM medium name, the device / file / sector table management means 212 is called (step 340). After the processing of the device / file / sector table management means 212 is completed in step 340, C in step 310 is executed.
Return to the D-ROM device opening / closing monitoring state.

FIGS. 4 and 5 are flow charts for explaining the operation of the device / file / sector table management means 212 shown in FIG. The procedure for actually creating the CD-ROM management table on the memory 130 based on the series of operations described in the above-described embodiment of the present invention will be described below.

In this embodiment, the CD-ROM shown in FIG.
CD-ROM medium “: KAZU” on the device “: D” 140
Is set, and the CD-ROM device ": E" 150 is set to CD
-ROM medium ": HIRA" shall be set.

First, the CD-ROM device ": D" 140 is accessed to confirm that the CD-ROM medium is set. Next, the name ": KAZU" is read from the CD-ROM medium. The memory control unit 211 secures a table area on the memory 130 and writes the root directory information at the head. That is, FIG.
As shown in (A), "D" and "KAZU" are written out.

Then, the directory name, file name and individual sector number immediately below the root directory are read from the CD-ROM medium, and the directory name , file name and sector number are set in the table on the memory 130. Here, the CD-ROM medium ": KAZU" is shown in FIG.
If the file structure is as shown in FIG.
As shown in (A), "FILE1.TXT", "FIL"
E2. TXT ”,“ FILE3. TXT "," DIR
The names "1" and "DIR2" and the sector number are set in the table.

[0036] After that, the directory directly under the root directory
The processing is continued for the object names “DIR1” and “DIR2”. The directory name , file name, and sector number of "DIR1" are set in the table on the memory 130. Under the file structure shown in FIG. 7, “FILE1
1. TXT ”,“ FILE12. TXT "," DIR1
1 "and" DIR12 "are read and set in a table on the memory 130. At this time, as shown in Fig. 6A, the logical address in the memory of the parent directory" DIR1 "is" FILE11. TXT "~" DIR2 "
The starting address and the ending address of the memory 130 used for are set.

Then, "DIR11" and "DIR12"
However, since neither the directory nor the file exists under each directory in the file structure shown in FIG. 7, after setting “NULL” to the in-memory logical address as shown in FIG. 6 (A). , "DIR
Move on to 2 "processing.

Under "DIR2", as shown in FIG. 7, "FILE21.TXT" and "FILE22.TX" are provided.
Since "T" and "DIR21" exist, these are read and the directory name , file name and sector number are set in the table on the memory 130. In this case, as shown in FIG. FILE21. TX
T "," FILE22. The names and sector numbers of "TXT" and "DIR21" are set in the table, and then the logical address in the memory of the parent directory "DIR2" is set to "FILE21. TXT "~" DIR21 "
The starting address and the ending address of the memory 130 used for are set.

Then, the process goes to "DIR21",
The directory name , file name and sector number immediately under "DIR21" are set in the table on the memory 130.
Under “DIR21”, as shown in FIG.
LE111. Since TXT "and" DIR111 "exist, these are read and set in the table on the memory 130. At this time, the parent directory" D "
"FILE11" is added to the in-memory logical address of "IR21".
1. Memory 13 used for TXT "-" DIR111 "
The start address and end address of 0 are set.

Next, the CD-ROM device ": E" 150 is accessed to confirm that the CD-ROM medium is set. Next, the name ": HIRA" is read from the CD-ROM medium. The memory control unit 211 secures a table area on the memory 130 and writes the root directory information at the head. That is, FIG.
As shown in (B), "E" and "HIRA" are written out.

Subsequently, the directory name, file name and individual sector number immediately below the root directory are read from the CD-ROM medium, and the directory name , file name and sector number are set in the table on the memory 130. Here, the CD-ROM medium ": HIRA" is shown in FIG.
If the file structure is as shown in FIG.
As shown in (B), "FILE a. TXT", "FIL
E. The names "TXT", "DIR?", And "DIR" and the sector number are set in the table.

[0042] After that, the directory directly under the root directory
The processing is continued for the object names “DIR?” And “DIR”. The directory name , file name and sector number of "DIR?" Are set in the table on the memory 130. Under the file structure shown in FIG. 8, "FILE oyster.TXT" and "FILE crawl.TXT" are read,
Set in a table on the memory 130. At this time, as shown in FIG. 6B, the parent directory “DIR” is displayed.
The logical address in the memory of "KA" is "FILE. TX
T "~" FILE. Memory 13 used for TXT "
The start address and end address of 0 are set.

Next, the process goes to "DIR", but in the file structure shown in FIG. 8, neither directory nor file exists under "DIR".
As shown in (B), "NUL
L ”is set.

Since the CD-ROM medium is not set in the CD-ROM device ": F" 160, the process of the device / file / sector table management means 212 is finished at this point.

In the above embodiment, three CD-
Although the case where the ROM device and the two CD-ROM media are used has been described, the number of CD-ROM devices, CD-RO
There is no limit to the number of CD-ROM media that can be set in the M device.

Further, in the above-mentioned embodiment, the external CD
Although the case where a plurality of ROM devices are connected in a manner described above has been described, the external CD-ROM device may be an autochanger type or a built-in autochanger type CD-ROM device. In addition, a built-in CD-R
The OM device and the external CD-ROM device may be mixed.

An autochanger type CD-RO
When using the M device, the CD-ROM medium is a CD-R
Since it is held in the OM device and the CD-ROM device name cannot be judged from the opening and closing of the door by the procedure as shown in FIG. 3, any device name in the CD-ROM device according to the procedure as shown in FIG. Alternatively, it may be determined whether the CD-ROM medium is set.

[0048]

As described above, according to the present invention,
Since the CD-ROM device name and sector number are expanded together with the file name in the table on the memory, the CD-ROM
The contents of the file can be directly read without searching the path table, root directory and sub-directories of the medium, and the file search speed can be significantly improved.

Further, according to the present invention, since the characteristic in the case of the normal file access that is accessed based on the device name is utilized, the conventionally used program can be accessed at the time of file access. It has an advantage that only the previous device name needs to be changed.

Further, according to the present invention, the program and C
Since middleware is not added to the D-ROM driver to change the interface with the program and the interface with the CD-ROM driver, there is no need to make any changes to the conventional software configuration. Have.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of hardware (H / W) that is a premise of an embodiment of the present invention.

FIG. 2 is a functional block diagram showing a detailed configuration of a plurality of CD-ROM access middleware in one embodiment of the present invention.

FIG. 3 is a flow chart for explaining the operation of a CD-ROM set recognition means in one embodiment of the present invention.

FIG. 4 is a flowchart (part) for explaining the operation of the device / file / sector table management means in the embodiment of the present invention.

FIG. 5 is a flowchart (part) for explaining the operation of the device / file / sector table management means in the embodiment of the present invention.

FIG. 6 is a diagram showing an example of a structural diagram of a CD-ROM management table in a memory created according to an embodiment of the present invention.

FIG. 7 is a diagram showing an example of a file structure diagram of a CD-ROM medium name “: KAZU” used in an embodiment of the present invention.

FIG. 8 is a diagram showing an example of a file structure diagram of a CD-ROM medium name “: HIRA” used in an embodiment of the present invention.

FIG. 9 is a flow chart for explaining the operation of the CD-ROM set recognition means in another embodiment of the present invention.

[Explanation of symbols]

100 Multiple CD-ROM access middleware 110 programs 120 CD-ROM driver 130 memory 140 CD-ROM device: D 150 CD-ROM device: E 160 CD-ROM device: F 200 Program I / F (interface) means 210 Sector management means 211 memory control means 212 Device / File / Sector Table Management Means 220 CD-ROM driver control means 221 CD-ROM set recognition means 222 File access method 230 Initial startup setting means

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-4-315218 (JP, A) JP-A-7-93110 (JP, A) JP-A-63-229677 (JP, A) JP-A-6- 52027 (JP, A) JP-A-8-180656 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06F 12/00 G06F 3/06-3/08

Claims (5)

(57) [Claims] 1. A method for speeding up access to a plurality of CD-ROMs in an information processing device to which a plurality of CD-ROM devices are connected, comprising: (a) monitoring whether the door of the CD-ROM device is opened or closed. And (b) when it is detected that the door of the CD-ROM device has been opened or closed, the C set in the CD-ROM device is detected.
Reading the CD-ROM medium name of the D-ROM medium; (c) the CD-ROM medium name developed in the memory;
A step of comparing the CD-ROM medium name read in the step (b), (d) a result of the comparison in the step (c), and the CD-ROM medium name developed in the memory C read
If the D-ROM medium name does not match, the CD-ROM device name and the CD-RO of the set CD-ROM medium are set.
The M media name to expand as the root directory information on the memory, the files under the root directory to expand the file name and sector number on the memory, its for the directory under the root directory
Of files and directories under the directory
A method for speeding up access to a plurality of CD-ROMs, comprising: expanding start and end addresses on the memory into the memory. 2. A plurality of CD-ROMs in an information processing device to which an autochanger type CD-ROM device is connected.
(B) CD-ROM set in the CD-ROM device.
Reading the CD-ROM medium name of the medium; (c) the CD-ROM medium name developed in the memory;
A step of comparing the CD-ROM medium name read in the step (b), (d) a result of the comparison in the step (c), and the CD-ROM medium name developed in the memory C read
If the D-ROM medium name does not match, the CD-ROM device name and the CD-RO of the set CD-ROM medium are set.
The M media name to expand as the root directory information on the memory, the files under the root directory to expand the file name and sector number on the memory, its for the directory under the root directory
Of files and directories under the directory
A method for speeding up access to a plurality of CD-ROMs, comprising: expanding start and end addresses on the memory into the memory. 3. The step (d) comprises: (e) setting a CD-ROM device name and a CD-ROM medium name as root directory information in a table on a memory; and (f) a file directly under the root directory. About Phi
And the step of setting a filename and sector number to the table on the memory, de for the directory under (g) root directory
A step of expanding the directory name and the sector number in the memory; (h) a step of reading the information under the directory expanded in the memory in the step (g) from the CD-ROM medium; (i) a step in the step (g). Of the expanded directory in memory
A step of confirming whether or not the file exists immediately below , and (j) a step of setting the file name and the sector number of each file in a table on the memory when the existence of the file is confirmed in the step (i) And (k) the directory expanded in memory in step (g) above
The step of confirming whether or not the directory exists immediately below , and (l) the existence of the directory is confirmed in the step (k).
Directory name and sector number of each directory if
To a table in memory,
Process from step (h) to step (o) described below.
Step, (m) file or file in step (i) and step (k)
If the directory is confirmed to exist,
For the directory expanded in memory in step (g),
Exist in step (i) and step (k).
On the memory of the file or directory for which
Expanding the start and end addresses in memory, and (n) storing the file and file in step (i) and step (k).
And that both directories do not exist
In, the directory where you expanded in the memory in the step (g)
"NULL" information is set for
Move to another directory at the same level as
A plurality of Cs according to claim 1 or 2, further comprising : (o) confirming completion of processing of all directories after the step (n) is completed.
A method for speeding up access to a D-ROM. 4. An information processing device comprising a plurality of CD-ROM devices connected to a main body device, wherein a CD-ROM access middleware control means is provided between a program for requesting access to a CD-ROM and a CD-ROM driver. The CD-ROM access middleware control means includes: a program interface means for interfacing with the program; a sector management means; and a CD-ROM driver control means, wherein the sector management means includes the information processing device. Memory control means for dynamically allocating an area on the memory, and a CD-ROM device name and C for the area secured on the memory.
D-ROM medium name as root directory information
Set and file the files under the root directory.
Name and sector number and set the root directory
About the directories below The files under that directory
File and directory start and end addresses on the memory.
A device for expanding a dress / file / sector table management means is provided, and a file on a CD-ROM medium is directly transferred to a file name requested by the program based on the sector number expanded on the memory. The CD-ROM driver control means constantly monitors the plurality of CD-ROM devices for the presence / absence of a CD-ROM medium set by opening / closing the door, etc. Upon confirming that the ROM medium is set, the sector management means is notified of the CD-ROM device name, while the CD-ROM from the CD-ROM device is notified.
When it is confirmed that the medium is taken out, a CD is sent to the sector management means.
CD-ROM set recognition means for notifying the ROM device name, and sector numbers received from the sector management means,
An information processing apparatus comprising: a file access unit for reading the contents of a file from a ROM medium. 5. The device / file / sector table management means of the sector management means receives a notification that a CD-ROM medium is set from the CD-ROM set recognition means, and from the designated CD-ROM device. CD-ROM
The information in the medium is expanded into the memory, and the information in the CD-ROM medium of the designated CD-ROM device is deleted from the memory when the CD-ROM medium removal notification is received from the CD-ROM set recognition means. The information processing apparatus according to claim 4, characterized in that.