JPS55162164A - Movable head disk unit - Google Patents

Movable head disk unit

Info

Publication number
JPS55162164A
JPS55162164A JP6978679A JP6978679A JPS55162164A JP S55162164 A JPS55162164 A JP S55162164A JP 6978679 A JP6978679 A JP 6978679A JP 6978679 A JP6978679 A JP 6978679A JP S55162164 A JPS55162164 A JP S55162164A
Authority
JP
Japan
Prior art keywords
request
requests
seek time
added
case
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
JP6978679A
Other languages
Japanese (ja)
Inventor
Hideo Nagai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6978679A priority Critical patent/JPS55162164A/en
Publication of JPS55162164A publication Critical patent/JPS55162164A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To attain high-speed access by controlling the processing order of continuous access requests so that the seek time of access requests will be shortened.
CONSTITUTION: Memory unit 10 is stored in request R2 firstly. In case of inserting added request R3 for cylinder position X3 before and after previously-stored request R2 while request R1 is being processed by processing mechanism 11, the seek time is computed and compared so as to select shorter one. Therefore, request R3 is inserted before request R2. Next, when request R4 is added, the seek time in case of inserting it between requests R1 and R3, and R3 and R2 and after request R2 is computed and compared so as to determine its insertion position. In this case, request R4 is therefore inserted after request R2 so that the seek time will be minimized. Similarly, every time requests R5 or R6 is added, the insertion position is determined by computation 1 and comparison. The processing order agrees with the order of a line of requests.
COPYRIGHT: (C)1980,JPO&Japio
JP6978679A 1979-06-04 1979-06-04 Movable head disk unit Pending JPS55162164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6978679A JPS55162164A (en) 1979-06-04 1979-06-04 Movable head disk unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6978679A JPS55162164A (en) 1979-06-04 1979-06-04 Movable head disk unit

Publications (1)

Publication Number Publication Date
JPS55162164A true JPS55162164A (en) 1980-12-17

Family

ID=13412779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6978679A Pending JPS55162164A (en) 1979-06-04 1979-06-04 Movable head disk unit

Country Status (1)

Country Link
JP (1) JPS55162164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132692A (en) * 1988-11-11 1990-05-22 Fujitsu Ltd High speed access system for disk device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02132692A (en) * 1988-11-11 1990-05-22 Fujitsu Ltd High speed access system for disk device

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