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JPS6453241A - File management method - Google Patents

File management method

Info

Publication number
JPS6453241A
JPS6453241A JP62211038A JP21103887A JPS6453241A JP S6453241 A JPS6453241 A JP S6453241A JP 62211038 A JP62211038 A JP 62211038A JP 21103887 A JP21103887 A JP 21103887A JP S6453241 A JPS6453241 A JP S6453241A
Authority
JP
Japan
Prior art keywords
area
file
variable
written
deleted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62211038A
Other languages
Japanese (ja)
Inventor
Seiichi Sekine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP62211038A priority Critical patent/JPS6453241A/en
Publication of JPS6453241A publication Critical patent/JPS6453241A/en
Pending legal-status Critical Current

Links

Landscapes

  • Storage Device Security (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To prevent outsiders from reading a secret file by erasing completely the contents of the file out of a directory area and a data area of the file to be deleted. CONSTITUTION:A microprocessor substitutes a position 11 of a data area of the file written in a directory area 8 for a variable A and reads the capacity 12 of the file out of the area 8 to substitute it for a variable L. Then the position of a data area 9 of a disk 6 corresponding to a desired file is detected from the variable A and 00 is written in all blocks of the area 9 set at the position of the variable A as data. An amount equal to the block capacity is subtracted from the variable L. Then 00 is written in the area 8 corresponding to the file to be deleted as well as to the area 9 corresponding to the area 8. Thus the file is completely deleted.
JP62211038A 1987-08-24 1987-08-24 File management method Pending JPS6453241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62211038A JPS6453241A (en) 1987-08-24 1987-08-24 File management method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62211038A JPS6453241A (en) 1987-08-24 1987-08-24 File management method

Publications (1)

Publication Number Publication Date
JPS6453241A true JPS6453241A (en) 1989-03-01

Family

ID=16599339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62211038A Pending JPS6453241A (en) 1987-08-24 1987-08-24 File management method

Country Status (1)

Country Link
JP (1) JPS6453241A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03179542A (en) * 1989-12-08 1991-08-05 Matsushita Electric Ind Co Ltd Method and device for control of information on optical disk
JPH0997139A (en) * 1995-09-28 1997-04-08 Canon Inc Flush rom management method and device, and computer controller
WO2001022231A1 (en) * 1999-09-21 2001-03-29 Eco. Logistics Inc. Device for removing information from record device, information removing method, information removing program, and record device
JP2006023854A (en) * 2004-07-06 2006-01-26 Sharp Corp Information processor, storage device, storage controller and program
JP2006031268A (en) * 2004-07-14 2006-02-02 Sharp Corp Information processor and storage controller
US8005936B2 (en) 1998-10-06 2011-08-23 Ricoh Company, Ltd. Method and system to erase data by overwriting after expiration or other condition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03179542A (en) * 1989-12-08 1991-08-05 Matsushita Electric Ind Co Ltd Method and device for control of information on optical disk
JPH0997139A (en) * 1995-09-28 1997-04-08 Canon Inc Flush rom management method and device, and computer controller
US8005936B2 (en) 1998-10-06 2011-08-23 Ricoh Company, Ltd. Method and system to erase data by overwriting after expiration or other condition
WO2001022231A1 (en) * 1999-09-21 2001-03-29 Eco. Logistics Inc. Device for removing information from record device, information removing method, information removing program, and record device
JP2006023854A (en) * 2004-07-06 2006-01-26 Sharp Corp Information processor, storage device, storage controller and program
JP2006031268A (en) * 2004-07-14 2006-02-02 Sharp Corp Information processor and storage controller

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