JPS5541510A - Magnetic disc device - Google Patents

Magnetic disc device

Info

Publication number
JPS5541510A
JPS5541510A JP11377978A JP11377978A JPS5541510A JP S5541510 A JPS5541510 A JP S5541510A JP 11377978 A JP11377978 A JP 11377978A JP 11377978 A JP11377978 A JP 11377978A JP S5541510 A JPS5541510 A JP S5541510A
Authority
JP
Japan
Prior art keywords
cylinder
magnetic disc
disc device
request
external
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.)
Granted
Application number
JP11377978A
Other languages
Japanese (ja)
Other versions
JPS616405B2 (en
Inventor
Akira Sekino
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 JP11377978A priority Critical patent/JPS5541510A/en
Publication of JPS5541510A publication Critical patent/JPS5541510A/en
Publication of JPS616405B2 publication Critical patent/JPS616405B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE: To make an efficient data file allocation possible by incorporating a mechanism, which counts the access frequency for every cylinder, in a magnetic disc device.
CONSTITUTION: One counter mechanism is provided for every cylinder of a magnetic disc to count automatically the total of the access frequency of each cylinder. Further, the magnetic disc can read out the counter value, which is held by the counter mechanism, according to the request from the external and report it to the external. When one cylinder of n-number cylinders is accessed, the cylinder address is inputted to decoder 20, and simultaneously, the cylinder access signal is transferred to input 30. The output of the decoder transfers "1" to a specific one of AND gates 31, 32,...3n to make a count-up request for a specific one of counters 41, 42,...4n.
COPYRIGHT: (C)1980,JPO&Japio
JP11377978A 1978-09-16 1978-09-16 Magnetic disc device Granted JPS5541510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11377978A JPS5541510A (en) 1978-09-16 1978-09-16 Magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11377978A JPS5541510A (en) 1978-09-16 1978-09-16 Magnetic disc device

Publications (2)

Publication Number Publication Date
JPS5541510A true JPS5541510A (en) 1980-03-24
JPS616405B2 JPS616405B2 (en) 1986-02-26

Family

ID=14620891

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11377978A Granted JPS5541510A (en) 1978-09-16 1978-09-16 Magnetic disc device

Country Status (1)

Country Link
JP (1) JPS5541510A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58164042U (en) * 1982-04-27 1983-11-01 横河電機株式会社 floppy disk device
JPH01179280A (en) * 1987-12-29 1989-07-17 Osaka Gas Co Ltd Method for storing rewritable recording medium and for allocating store area
JPH0249274A (en) * 1988-08-10 1990-02-19 Osaka Gas Co Ltd Method for storing information in reloadable recording medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58164042U (en) * 1982-04-27 1983-11-01 横河電機株式会社 floppy disk device
JPH01179280A (en) * 1987-12-29 1989-07-17 Osaka Gas Co Ltd Method for storing rewritable recording medium and for allocating store area
JPH0249274A (en) * 1988-08-10 1990-02-19 Osaka Gas Co Ltd Method for storing information in reloadable recording medium

Also Published As

Publication number Publication date
JPS616405B2 (en) 1986-02-26

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