JPS5730161A - Disk controller - Google Patents

Disk controller

Info

Publication number
JPS5730161A
JPS5730161A JP10327880A JP10327880A JPS5730161A JP S5730161 A JPS5730161 A JP S5730161A JP 10327880 A JP10327880 A JP 10327880A JP 10327880 A JP10327880 A JP 10327880A JP S5730161 A JPS5730161 A JP S5730161A
Authority
JP
Japan
Prior art keywords
sector
register
signal
circuit
comparator
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
JP10327880A
Other languages
Japanese (ja)
Inventor
Kaoru Konno
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP10327880A priority Critical patent/JPS5730161A/en
Publication of JPS5730161A publication Critical patent/JPS5730161A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/005—Programmed access to indexed parts of tracks of operating discs, by guiding the disc

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To minimize an unnecessary latency time for rotation, by checking a sector number all the time in the beginning of search simultaneously in searching a desired sector. CONSTITUTION:The contents of a register 1 stored externally with the address data 10 of a desired sector are compared 5 with those of a sector counter 2 reset by an index mark signal 14 from a disk device and starting counting operation by a sector signal 15 to send the result to an AND circuit 6. Further, a sector register 3 stored with the contents of the counter 2 at prescribed timing is installed newly and on the basis of a sector 4, the output of the register 1 or 3 is selected and sent to the comparator 5. Here, an AND circuit 6 discriminates whether a correct sector is discovered by the signal from the comparator 5 or not, or whether a desired sector is detected on one rotatin or not, then the circuit outputs.
JP10327880A 1980-07-28 1980-07-28 Disk controller Pending JPS5730161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10327880A JPS5730161A (en) 1980-07-28 1980-07-28 Disk controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10327880A JPS5730161A (en) 1980-07-28 1980-07-28 Disk controller

Publications (1)

Publication Number Publication Date
JPS5730161A true JPS5730161A (en) 1982-02-18

Family

ID=14349882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10327880A Pending JPS5730161A (en) 1980-07-28 1980-07-28 Disk controller

Country Status (1)

Country Link
JP (1) JPS5730161A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60169929A (en) * 1984-02-14 1985-09-03 Hitachi Ltd Access control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60169929A (en) * 1984-02-14 1985-09-03 Hitachi Ltd Access control system
JPH0438003B2 (en) * 1984-02-14 1992-06-23 Hitachi Ltd

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