JPS57147111A - Processing system of data format of disc device - Google Patents

Processing system of data format of disc device

Info

Publication number
JPS57147111A
JPS57147111A JP3158281A JP3158281A JPS57147111A JP S57147111 A JPS57147111 A JP S57147111A JP 3158281 A JP3158281 A JP 3158281A JP 3158281 A JP3158281 A JP 3158281A JP S57147111 A JPS57147111 A JP S57147111A
Authority
JP
Japan
Prior art keywords
data
region
pure
disc device
data format
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
JP3158281A
Other languages
Japanese (ja)
Inventor
Shunji Handa
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP3158281A priority Critical patent/JPS57147111A/en
Publication of JPS57147111A publication Critical patent/JPS57147111A/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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To facilitate the control of a disc device, by lowering a recording density of a data format section required for comparison operation with a CPU, that is, the recording density other than pure data. CONSTITUTION:Synchronizing signal data of 46 and 47 are recorded just before and after a pure data region 42 are recorded at a sector format (b) in comparison with (a) of a conventional example. The bit density of a clock data 43 is higher than the bit density of 31, 39 and 47, the clock generator detects it to adjust the region other than a pure data region. In the pure data region, data exchange can be made with a sector buffer in high speed with a DMA mode in a controller. Inversely, since the transfer speed at the region other than the pure data is slow, the data in the ID field can be compared with a CPU easily.
JP3158281A 1981-03-05 1981-03-05 Processing system of data format of disc device Pending JPS57147111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3158281A JPS57147111A (en) 1981-03-05 1981-03-05 Processing system of data format of disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3158281A JPS57147111A (en) 1981-03-05 1981-03-05 Processing system of data format of disc device

Publications (1)

Publication Number Publication Date
JPS57147111A true JPS57147111A (en) 1982-09-10

Family

ID=12335174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3158281A Pending JPS57147111A (en) 1981-03-05 1981-03-05 Processing system of data format of disc device

Country Status (1)

Country Link
JP (1) JPS57147111A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6147826A (en) * 1997-03-12 2000-11-14 Fujitsu Limited Magnetic disk apparatus having duplicate sync byte patterns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6147826A (en) * 1997-03-12 2000-11-14 Fujitsu Limited Magnetic disk apparatus having duplicate sync byte patterns

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