JPH0327433A - Electronic disk device - Google Patents

Electronic disk device

Info

Publication number
JPH0327433A
JPH0327433A JP1162239A JP16223989A JPH0327433A JP H0327433 A JPH0327433 A JP H0327433A JP 1162239 A JP1162239 A JP 1162239A JP 16223989 A JP16223989 A JP 16223989A JP H0327433 A JPH0327433 A JP H0327433A
Authority
JP
Japan
Prior art keywords
error
data
ecc
circuit
generation
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
JP1162239A
Other languages
Japanese (ja)
Inventor
Hironori Mizoguchi
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP1162239A priority Critical patent/JPH0327433A/en
Publication of JPH0327433A publication Critical patent/JPH0327433A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent a data change by detecting an uncorrectable error in reading after restoration.
CONSTITUTION: In the saving/restoring processing of data with a magnetic disk device 3, an ECC (error correction code) generation correction circuit 24 detects and corrects an ECC error without functioning an error generation circuit 25 and a magnetic disk control circuit 22 writes the data for which the ECC generation/correction circuit 24 corrects into the magnetic disk device 3 with error information. At the time of a restoring processing, ECC generation/ correction circuit 24 generates ECC for the data which the magnetic disk control circuit 22 reads. When an uncorrectable error is detected, the error generation circuit 25 inverts the several bits of ECC, the data where the uncorrectable error occurs is generated and written into a memory circuit 26. When the uncorrectable error is not detected, the data is written into the memory circuit 26 without functioning the error generation circuit 25. Thus, the data alteration can be prevented.
COPYRIGHT: (C)1991,JPO&Japio
JP1162239A 1989-06-23 1989-06-23 Electronic disk device Pending JPH0327433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1162239A JPH0327433A (en) 1989-06-23 1989-06-23 Electronic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1162239A JPH0327433A (en) 1989-06-23 1989-06-23 Electronic disk device

Publications (1)

Publication Number Publication Date
JPH0327433A true JPH0327433A (en) 1991-02-05

Family

ID=15750630

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1162239A Pending JPH0327433A (en) 1989-06-23 1989-06-23 Electronic disk device

Country Status (1)

Country Link
JP (1) JPH0327433A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04353935A (en) * 1991-05-30 1992-12-08 Nec Corp Magnetic disk controller
JP2012508425A (en) * 2008-12-29 2012-04-05 インテル コーポレイション Poison bit error check code technique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04353935A (en) * 1991-05-30 1992-12-08 Nec Corp Magnetic disk controller
JP2012508425A (en) * 2008-12-29 2012-04-05 インテル コーポレイション Poison bit error check code technique

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