JPS5446439A - Magnetic disc controller - Google Patents

Magnetic disc controller

Info

Publication number
JPS5446439A
JPS5446439A JP11310177A JP11310177A JPS5446439A JP S5446439 A JPS5446439 A JP S5446439A JP 11310177 A JP11310177 A JP 11310177A JP 11310177 A JP11310177 A JP 11310177A JP S5446439 A JPS5446439 A JP S5446439A
Authority
JP
Japan
Prior art keywords
unit
magnetic disc
data
sector
data read
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
JP11310177A
Other languages
Japanese (ja)
Inventor
Katsushi Hikita
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
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11310177A priority Critical patent/JPS5446439A/en
Publication of JPS5446439A publication Critical patent/JPS5446439A/en
Pending legal-status Critical Current

Links

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Memory System Of A Hierarchy Structure (AREA)

Abstract

PURPOSE: to make it possible to process the read data of a sector whithout waiting while a disc rotate once, by providing a buffer memory stored with data read out from the magnetic disc device and by searching the dara part of the sector on its track under the assigned conditions.
CONSTITUTION: The controller consists of magnetic disc controller 1, magnetic disc device 2, and main memory unit 3, and controller 1 is equipped with comparator 4 which compares the data read from device 2 with that from unit 3, and buffer memory 5 stored with data read out from device 2. Starting with the address part where the search operation of the data part of device 2 is assigned, the comparison between the data read from device 2 and that of unit 3 is done on a bit unit or byte stored in memory 5. Then if the coincidence of the one-track comparison can not be obtained, the same comparison is repeated at the next sector, so that when a colincident sector is detected, the data of memory 5 will be transferred to unit 3
COPYRIGHT: (C)1979,JPO&Japio
JP11310177A 1977-09-19 1977-09-19 Magnetic disc controller Pending JPS5446439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11310177A JPS5446439A (en) 1977-09-19 1977-09-19 Magnetic disc controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11310177A JPS5446439A (en) 1977-09-19 1977-09-19 Magnetic disc controller

Publications (1)

Publication Number Publication Date
JPS5446439A true JPS5446439A (en) 1979-04-12

Family

ID=14603496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11310177A Pending JPS5446439A (en) 1977-09-19 1977-09-19 Magnetic disc controller

Country Status (1)

Country Link
JP (1) JPS5446439A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176581A (en) * 1981-04-20 1982-10-29 Hitachi Ltd Control mechanism for magnetic storage device
JPS6292022A (en) * 1985-10-18 1987-04-27 Hitachi Ltd Control system for transfer of data
JPS63193223A (en) * 1987-02-06 1988-08-10 Agency Of Ind Science & Technol Selecting device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176581A (en) * 1981-04-20 1982-10-29 Hitachi Ltd Control mechanism for magnetic storage device
JPH0245271B2 (en) * 1981-04-20 1990-10-08 Hitachi Ltd
JPS6292022A (en) * 1985-10-18 1987-04-27 Hitachi Ltd Control system for transfer of data
JPS63193223A (en) * 1987-02-06 1988-08-10 Agency Of Ind Science & Technol Selecting device
JPH054692B2 (en) * 1987-02-06 1993-01-20 Kogyo Gijutsuin

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