JP2001344071A - Hard disk whitening system for personal computer and storage medium for hard disk whitening of personal computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a whitening system for automatically and easily performing the complete erasure of basic software installed in the hard disk of a leased-up personal computer and a storage medium. SOLUTION: This system is provided of an MS-DOS system, an automatic starting file to be automatically read by the MS-DOS system, and a whitening program to be started by the autonomic starting file. The whitening program is constituted of an information obtaining means for obtaining information related with the hard disk of a personal computer and an erasing means for erasing the contents of the hard disk from the obtained information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk whitening system of a personal computer (hereinafter, referred to as a personal computer) and a disk storing the whitening system. More specifically, a whitening system and a whitening system for erasing basic software (hereinafter referred to as OS) and the like in a hard disk when reusing a leased-up personal computer or reusing disassembled personal computer parts. The present invention relates to a storage medium storing a whitening system.

[0002]

2. Description of the Related Art In recent years, with the intensifying competition in the development of personal computers and their peripheral devices in terms of hardware and software, the pitch of high-performance products has rapidly increased, and the tendency of shortening the product life cycle has become remarkable. For this reason, the number of cases of disposing of old-fashioned personal computers has increased, and the necessity for an immediate solution has been debated as personal computers have come to the fore as a central part of the garbage problem.

As a result, 200
Two years later, PCs were specified in the Recycling Law. However, the OS used in personal computers
Etc. are not purchased by the user and are subject to a license agreement
If the user disposes of it without permission because it has been concluded with a S-software maker, it will be used by unauthorized users in the form of reuse.
It is necessary to always whiten the disk on which S is installed, that is, erase the software.

[0004]

However, in the conventional format, only the logical erasure is performed and the OS and data are not completely erased. Even after the logical erasure is performed by the format command, The OS still remains in the disk, and recycling such a disk may violate a contract with an OS manufacturer. Therefore, it has become necessary to completely erase these OSs and data for recycling.

[0005] However, in order to perform this, a specialized technician with a certain skill is required, and it is expected that the number of personal computers that perform whitening before and after the enforcement of the above-mentioned recycling law will increase sharply. At present, there is a shortage of technicians, and in order to respond quickly, the systemization of whitening work has automated the work and responded to the increase in the number of recycled PCs. It was also desired to enable whitening work.

Accordingly, an object of the present invention is to allow a normal user, not a technician, to automatically operate a personal computer to erase the OS in the hard disk of a hard disk of a personal computer which is a target of recycling. An object of the present invention is to provide a hard disk whitening system for a personal computer and a storage medium for whitening.

[0007]

The hard disk whitening system for a personal computer according to the present invention employs M
In a disk whitening system including an S-DOS system, an automatic start file automatically read by the MS-DOS system, and a whitening program started by the automatic start file, the whitening program acquires information on a hard disk of a personal computer. The gist of the present invention is to include an information obtaining means for performing the operation and an erasing means for erasing the inside of the hard disk with the obtained information.

The information acquiring means is a means for designating a drive, a state test determining means for determining whether or not the designated drive is usable, and an address designating method of the drive determined to be usable is an LBA mode. It is preferable to include means for determining whether the mode is the CHS mode.

Preferably, the erasing means includes means for writing a predetermined value in all accessed sectors.

It is preferable that the writing means shifts to the writing of the sector and executes the writing sequentially when the writing of an arbitrary sector is unsuccessful.

The storage medium for whitening a hard disk of a personal computer according to the present invention relates to an MS-DOS system, an automatic start file automatically read by the MS-DOS system, and a hard disk of the personal computer started by the automatic start file. It is desirable to store a whitening program including an information acquiring unit for acquiring information and an erasing unit for erasing the inside of the hard disk with the acquired information.

The information acquisition means is a means for designating a drive, a status test determining means for determining whether or not the specified drive is usable, and an address designating method of a drive determined to be usable is an LBA mode. It is preferable to include means for determining whether the mode is the CHS mode.

Preferably, the erasing means includes means for writing a predetermined value to all accessed sectors.

It is preferable that the writing means shifts to writing of a sector next to the sector when writing of one sector is unsuccessful, and sequentially executes writing.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a whitening system for a hard disk of a personal computer according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a basic system of a whitening system according to the present invention. Reference numeral 1 denotes a personal computer to be whitened, that is, a PC-AT compatible machine;
Reference numeral 2 denotes a floppy disk used for whitening. More specifically, in the personal computer 1, various data including an OS are installed in a plurality of hard disks 11a to 11x to be whitened.

On the other hand, the floppy disk 2 is MS-DO
S system 21, automatic startup file (autoexec.bat) 2
2. The whitening program 23 is installed.

When the floppy disk 2 is inserted into the A drive of the personal computer 1 and the power is turned on, the MS-DOS 21 is connected to the personal computer 1 (PC-AT compatible machine).
And the MS-DOS system is started.
And the MS-DOS system automatically starts the file 2
2 is read automatically. The automatic start file specifies the start of the whitening program 23 and is executed by the MS-DOS.

On the other hand, the hard disk is connected to a plurality of drives of the personal computer as shown in FIG. That is, the hard disk 11a of the personal computer,
Drive 11a to which 11b, 11c to 11x are connected
, 11b ', 11c' to 11x 'have a drive number 0
x80, 0x81, and 0x82 to 0x90 are allocated.

When the start is instructed, the whitening program executes the BIO of the personal computer via the MS-DOS.
A call is made to S to obtain information about the hard disk from the BIOS. That is, after the start as shown in FIG. 3, the step S1 for accessing the drive 11a 'of the drive number 0x80 is started.

Then, the process proceeds to step S2 for comparing with the drive number 0x90 to determine whether the value is larger than the drive number. If NO, that is, if the drive number is small, the process proceeds to step S3 to determine whether or not the drive 1a is usable, that is, whether or not a hard disk exists. If YES, that is, if it is available, the process proceeds to step S4, which is an erasing process for the designated drive.

When the erasing process is completed, the process proceeds to step S5 where 1 is added to the drive number 0x80, and the drive 11b '(drive number 0x81) of the next hard disk 11b is accessed as 0x81, and the drive number is compared with 0x90 in step S2. It is determined whether or not it is larger, and if NO, the process proceeds to step S3, step S4, and step S5 in the same manner.

If the drive number 0 in step S2
If the result of comparison with x90 is YES, that is, if it is larger, the flow ends immediately. If the determination in step S3 is NO, ie, if the hard disk is not recognized, the process proceeds to step S5 without erasing and adds 1 to the drive number to access the next drive 0x81. I do.

Next, details of the erasing process for the designated drive in step S4 will be described with reference to FIG. This drive erasing process overwrites all sectors of the recognized hard disk with the specified value. This overwrite value may be any value as long as it has no meaning, and may be, for example, a space or NULL. In other words, if the same value is used, all the recognized sectors are overwritten, thereby achieving the purpose of whitening.

More specifically, as shown in FIG. 3, if it is determined in step S3 whether or not the drive can be used, the erasure process of the designated drive is started as shown in FIG. I do. That is, in step S11, the designation of the address starts with 0 as the designation of the first write sector by a counter (not shown). And step S
At 12, the memory of the personal computer is secured and the value for the desk initialization is embedded.

Then, in step S13, it is determined whether or not the designated write sector is larger than the last sector.
Then, it is determined whether or not the address is specified in the LBA mode. If NO, the write sector is converted to the CHS format in step S15.

Then, in step S16, the extended INT
In step 13, function number 03 is set. Further, step S17
Confirm that the number of retries is 0. Then, in step S18, the hard disk (drive number 0
x80) is written to the disk. The number of write retries is set to 3.

Next, in step S19, it is determined whether or not the writing is successful. If YES, the process proceeds to step S22, where 1 is added to the address to update the position of the writing sector. Then, the process returns to step S13 for determining whether or not the next sector is larger than the last sector. If it is determined that the sector is small, that is, if NO, it is further determined whether or not the updated sector is in the LBA mode. Proceed to step S14 to determine.

If NO, the write sector is converted to the CHS format in step S15. Then, in step S16, the function number 03 is set in the extended INT13, and it is confirmed in step S17 that the number of retries is 0. Then, in step S18, disk writing is performed on the hard disk (drive number 0x80).

Then, in step S19, it is determined whether or not the writing is successful. If YES, that is, if the writing is successful, step S22 is performed to update the position of the write sector.
Add 1 to the address of the counter. This procedure is repeated, and it is determined whether or not the write sector is larger than the last sector in step S13, that is, if it is determined that the write sector is larger, the write process is terminated.

If it is determined in step S14 whether the address designation method is the LBA mode or not, YES
If it is determined that the extended INT
In step 13, the function number 43 is set, and in step 17, it is confirmed that the number of retries is 0. And step S1
In step 8, the disc is written to the hard disk (drive number 0x80). Hereinafter, the same steps as described above are repeated.

If NO is determined in step S19 as to whether or not the writing is successful, the process proceeds to step S19.
The process proceeds to step S20, where it is determined whether the number of retries is greater than 3. If NO, 1 is added to the number of retries in step S21, and the process returns to step S18 to execute disk writing. Then, in step S19, it is determined whether or not the writing is successful. If the determination is NO again, the process proceeds to step S21, where the number of retries is compared with 3 to determine whether or not the number is greater than three.

If NO, 1 is added to the number of retries, and the flow returns to step S18 to execute writing again. If this writing failure is repeated three times, the number of retries becomes 4, and the determination in step S20 is YES. Therefore, the writing of the sector is abandoned, and the process proceeds to step S22, where 1 is added to the sector number for updating the write sector position. . Then, the process returns to step S13 to repeat the above steps for writing to the next drive.

The LBS mode, which is a method of specifying an address, is a method in which serial numbers are assigned to all sectors of a target hard disk and the sectors are specified by the serial numbers. On the other hand, the CHS mode is a cylinder (C ), Head (H), and sector (S). Generally, the sector designation method is effective up to a disk capacity of 8.4 GB, but when the disk capacity is larger than 8.4 GB, the LBA mode is used.

The above-mentioned extended INT13 is a disk B newly added by IBM and Microsoft.
It is an IOS function that provides functions such as support for large-capacity drives, locking of removable media, and ejection.

As shown in FIG. 5, the whitening program 23 calls the BIOS of the personal computer via the MS-DOS 21 to acquire information on the hard disk 11a, and then writes data to each sector as shown in FIG. . Then, the writing result is returned to the whitening program 23 to determine whether the writing is successful.

As described above, the embodiment has been described with reference to a personal computer having a plurality of hard disk drives. However, the present invention is not limited to this, and can be applied to a single hard disk drive personal computer.

[0038]

According to the present invention, as described above, the whitening program includes information acquisition means for acquiring information on the hard disk of the personal computer and erasing means for erasing the inside of the hard disk with the acquired information. Even a normal user, not a user, operates the personal computer to erase the OS in the hard disk, so that whitening can be performed automatically, easily and quickly.

The information obtaining means is a means for designating a drive, a state test determining means for determining whether or not the specified drive is usable, and an address designating method of the drive determined to be usable is an LBA mode. Since it includes means for determining whether the mode is the CHS mode or the CHS mode, the erasing operation can be automatically and easily performed on a plurality of hard disk drives. Further, since the whitening program is stored in the storage medium, the whitening process can be automatically and easily executed by any PC drive as long as it is a PC-AT compatible machine.

Further, since the erasing means includes means for writing a predetermined value to all accessed sectors, it is easy to create a whitening processing program.

Further, when the writing of one sector is unsuccessful, the writing means proceeds to the writing of the next sector after the sector and sequentially executes the writing. Therefore, even if the hard disk is damaged, the whitening operation is continued and the writing is continued. It is possible to prevent the basic software from being used without permission by making it unusable as a disk.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a basic structure of a whitening system for a hard disk of a personal computer according to the present invention.

FIG. 2 is a schematic view of a personal computer having a plurality of hard disk drives to be whitened.

FIG. 3 is a flowchart of a hard disk whitening system of a personal computer according to the present invention.

FIG. 4 is a flowchart illustrating details of a processing procedure of a designated drive.

FIG. 5 is a system configuration diagram of steps S11 to S22 for performing whitening.

[Explanation of symbols]

 Reference Signs List 1 personal computer 11 hard disk 11a hard disk 11b hard disk 11c hard disk 11d hard disk 11x hard disk 2 floppy disk 21 MS-DOS system 22 automatic start file 23 whitening program

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshiaki Koizumi 3-8-10 Nagasaki, Toshima-ku, Tokyo (72) Inventor Makoto Nakayama 2-2-13 Matsue, Edogawa-ku, Tokyo F-term (reference) 5B065 BA01 ZA06 ZA20

Claims (8)

[Claims] An MS-DOS system and said M-DOS system
In a hard disk whitening system including an automatic start file automatically read by the S-DOS system and a whitening program started by the automatic start file, the whitening program obtains information about a hard disk of a personal computer; A hard disk whitening system for a personal computer, comprising erasing means for erasing the inside of a hard disk with acquired information. 2. An LBA mode, wherein the information acquisition unit is a unit for designating a drive, a state test determining unit for determining whether or not the specified drive is usable, and an address specifying method of the drive determined to be usable is an LBA mode. Or CH
2. The hard disk whitening system for a personal computer according to claim 1, further comprising means for determining whether the mode is an S mode. 3. The hard disk whitening system for a personal computer according to claim 2, wherein said erasing means includes means for writing a predetermined value in all accessed sectors. 4. The hard disk whitening of a personal computer according to claim 3, wherein said writing means shifts to writing of a sector next to said sector and sequentially executes writing when writing of an arbitrary sector is unsuccessful. system. 5. The MS-DOS system and the M-DOS system
Whitening including an automatic startup file automatically read by the S-DOS system, information acquisition means activated by the automatic activation file to acquire information on the hard disk of the personal computer, and erasing means for erasing the inside of the hard disk with the acquired information A storage medium for hard disk whitening of personal computers that stores programs. 6. An LBA mode, wherein said information obtaining means is a means for designating a drive, a status test determining means for determining whether or not the specified drive is usable, and an address specifying method of a drive determined to be usable is an LBA mode. Or CH
6. The storage medium for hard disk whitening of a personal computer according to claim 5, further comprising means for determining whether the mode is an S mode. 7. The storage medium for hard disk whitening of a personal computer according to claim 6, wherein said erasing means includes means for writing a predetermined value to all accessed sectors. 8. The hard disk whitening storage according to claim 7, wherein said writing means shifts to writing of a sector next to said sector and sequentially executes writing when writing of one sector is unsuccessful. Medium.