JPS57111811A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS57111811A
JPS57111811A JP18532180A JP18532180A JPS57111811A JP S57111811 A JPS57111811 A JP S57111811A JP 18532180 A JP18532180 A JP 18532180A JP 18532180 A JP18532180 A JP 18532180A JP S57111811 A JPS57111811 A JP S57111811A
Authority
JP
Japan
Prior art keywords
track
block
recording
division
uniform
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
JP18532180A
Other languages
Japanese (ja)
Inventor
Masanobu Ikutake
Kazuyuki Seki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18532180A priority Critical patent/JPS57111811A/en
Publication of JPS57111811A publication Critical patent/JPS57111811A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To increase the overall recording capacity, by dividing a data recording plane into concentric disk blocks and making the recording capacity for each length on a track uniform with a specific means. CONSTITUTION:A data recording plane is divided into 4 blocks #OBK-#3BK, and the read/write clock is switched with every block. Then the recording bit number is made to uniform with every unit distance toward the circumference of a circle on each block track. For instance, the division of the logical track is made to correspond to the division corresponding to the physical track on the block #3BK in consideration of the logical track. Then the division of the logical track has a correspondence with every 8KB for the track on the block #2BK. For the division of the logical track, the bit density on a recording medium can be made to uniform for each block by recording the index information on the track.
JP18532180A 1980-12-29 1980-12-29 Magnetic disk device Pending JPS57111811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18532180A JPS57111811A (en) 1980-12-29 1980-12-29 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18532180A JPS57111811A (en) 1980-12-29 1980-12-29 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS57111811A true JPS57111811A (en) 1982-07-12

Family

ID=16168783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18532180A Pending JPS57111811A (en) 1980-12-29 1980-12-29 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS57111811A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873679A (en) * 1986-12-25 1989-10-10 Matsushita Electric Industrial Co., Ltd. Optical information recording disk and optical information recording disk apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873679A (en) * 1986-12-25 1989-10-10 Matsushita Electric Industrial Co., Ltd. Optical information recording disk and optical information recording disk apparatus

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