JPS5446439A - Magnetic disc controller - Google Patents
Magnetic disc controllerInfo
- Publication number
- JPS5446439A JPS5446439A JP11310177A JP11310177A JPS5446439A JP S5446439 A JPS5446439 A JP S5446439A JP 11310177 A JP11310177 A JP 11310177A JP 11310177 A JP11310177 A JP 11310177A JP S5446439 A JPS5446439 A JP S5446439A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- magnetic disc
- data
- sector
- data read
- 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)
- Memory System Of A Hierarchy Structure (AREA)
Abstract
PURPOSE: to make it possible to process the read data of a sector whithout waiting while a disc rotate once, by providing a buffer memory stored with data read out from the magnetic disc device and by searching the dara part of the sector on its track under the assigned conditions.
CONSTITUTION: The controller consists of magnetic disc controller 1, magnetic disc device 2, and main memory unit 3, and controller 1 is equipped with comparator 4 which compares the data read from device 2 with that from unit 3, and buffer memory 5 stored with data read out from device 2. Starting with the address part where the search operation of the data part of device 2 is assigned, the comparison between the data read from device 2 and that of unit 3 is done on a bit unit or byte stored in memory 5. Then if the coincidence of the one-track comparison can not be obtained, the same comparison is repeated at the next sector, so that when a colincident sector is detected, the data of memory 5 will be transferred to unit 3
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11310177A JPS5446439A (en) | 1977-09-19 | 1977-09-19 | Magnetic disc controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11310177A JPS5446439A (en) | 1977-09-19 | 1977-09-19 | Magnetic disc controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5446439A true JPS5446439A (en) | 1979-04-12 |
Family
ID=14603496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11310177A Pending JPS5446439A (en) | 1977-09-19 | 1977-09-19 | Magnetic disc controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5446439A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176581A (en) * | 1981-04-20 | 1982-10-29 | Hitachi Ltd | Control mechanism for magnetic storage device |
JPS6292022A (en) * | 1985-10-18 | 1987-04-27 | Hitachi Ltd | Control system for transfer of data |
JPS63193223A (en) * | 1987-02-06 | 1988-08-10 | Agency Of Ind Science & Technol | Selecting device |
-
1977
- 1977-09-19 JP JP11310177A patent/JPS5446439A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176581A (en) * | 1981-04-20 | 1982-10-29 | Hitachi Ltd | Control mechanism for magnetic storage device |
JPH0245271B2 (en) * | 1981-04-20 | 1990-10-08 | Hitachi Ltd | |
JPS6292022A (en) * | 1985-10-18 | 1987-04-27 | Hitachi Ltd | Control system for transfer of data |
JPS63193223A (en) * | 1987-02-06 | 1988-08-10 | Agency Of Ind Science & Technol | Selecting device |
JPH054692B2 (en) * | 1987-02-06 | 1993-01-20 | Kogyo Gijutsuin |
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