JPS6410478A - Magnetic disk controller - Google Patents
Magnetic disk controllerInfo
- Publication number
- JPS6410478A JPS6410478A JP16427287A JP16427287A JPS6410478A JP S6410478 A JPS6410478 A JP S6410478A JP 16427287 A JP16427287 A JP 16427287A JP 16427287 A JP16427287 A JP 16427287A JP S6410478 A JPS6410478 A JP S6410478A
- Authority
- JP
- Japan
- Prior art keywords
- track
- seek
- register
- counter
- access
- 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
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE:To reduce mean seek time by assigning a head to a track being the result of averaging track numbers having an access request. CONSTITUTION:A track access counter is set to an initial value 1, a seek control block 4 checks whether or not a seek request exists and when no seek request exists, the head is moved to the track stored in a register 3. On the other hand, when the seek request exists, a control block 4 sends a seek request to a magnetic disk 5 to increment the counter 1 by 1. A mean value track calculation block 2 calculates a mean access track number from the content of the counter 1, the present content of the register 3 and track numbers having a seek request and stores the result in the register 3. The head position is moved onto the track corresponding to the mean value of the track number accessed in the past.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16427287A JPS6410478A (en) | 1987-07-01 | 1987-07-01 | Magnetic disk controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16427287A JPS6410478A (en) | 1987-07-01 | 1987-07-01 | Magnetic disk controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6410478A true JPS6410478A (en) | 1989-01-13 |
Family
ID=15789932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16427287A Pending JPS6410478A (en) | 1987-07-01 | 1987-07-01 | Magnetic disk controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6410478A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03214472A (en) * | 1990-01-18 | 1991-09-19 | Matsushita Electric Ind Co Ltd | Information recording and reproducing device |
JPH06333351A (en) * | 1993-05-25 | 1994-12-02 | Nec Corp | Method and device for controlling magnetic disk device |
-
1987
- 1987-07-01 JP JP16427287A patent/JPS6410478A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03214472A (en) * | 1990-01-18 | 1991-09-19 | Matsushita Electric Ind Co Ltd | Information recording and reproducing device |
JPH06333351A (en) * | 1993-05-25 | 1994-12-02 | Nec Corp | Method and device for controlling magnetic disk device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TW332284B (en) | Method and apparatus for controlling access to a recording disk | |
GB9405753D0 (en) | Interactive compact disk system | |
EP0399649A3 (en) | Microprocessor controlled universal video monitor | |
DE69032334D1 (en) | Virtual computer system with I / O interrupt control | |
ES2000983A6 (en) | System for generating mask pattern for vector data processor. | |
JPS6410478A (en) | Magnetic disk controller | |
CA2046708A1 (en) | Nonsynchronous dasd control | |
MY113823A (en) | Magnetic disk unit and method for controlling the same | |
CA2011384A1 (en) | Track access control apparatus for optical disk apparatus | |
EP0352462A3 (en) | Method and apparatus for calculating disk-access footprints | |
MY104474A (en) | Disc recording apparatus | |
AU5297286A (en) | Controlling access in multi-cache system | |
EP0298418A3 (en) | Virtual computer system | |
CA2001886A1 (en) | Data processing apparatus | |
JPS57111646A (en) | Floppy disc control system | |
JPS5793463A (en) | Renewal processing system for master file | |
JPS6419453A (en) | Adapter controller | |
USD256027S (en) | Combination counter and tabulator for controlling food intake | |
JPS57109073A (en) | Exclusive control system by cross-call controller | |
WO1991001534A3 (en) | Access control apparatus and key means | |
JPS5538621A (en) | Magnetic disc unit | |
JPS6486231A (en) | Access device for magnetic disk | |
JPS5729130A (en) | Common-bus interface protecting system | |
EP0417900A3 (en) | Disk storage system with access control | |
TW256912B (en) | Double-cassette-type magnetic recording-reproduction apparatus |