JPS55162164A - Movable head disk unit - Google Patents
Movable head disk unitInfo
- 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
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
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)
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 |
-
1979
- 1979-06-04 JP JP6978679A patent/JPS55162164A/en active Pending
Cited By (1)
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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