JPS56121161A - Magnetic disc unit - Google Patents
Magnetic disc unitInfo
- Publication number
- JPS56121161A JPS56121161A JP2276780A JP2276780A JPS56121161A JP S56121161 A JPS56121161 A JP S56121161A JP 2276780 A JP2276780 A JP 2276780A JP 2276780 A JP2276780 A JP 2276780A JP S56121161 A JPS56121161 A JP S56121161A
- Authority
- JP
- Japan
- Prior art keywords
- cpu1
- physical address
- address
- access frequency
- magnetic disc
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE:To execute the access at a high speed against unequal access number of times, by easily optimizing the assignment of a physical address without changing the existing the service program of the CPU. CONSTITUTION:A correspondence table of the logical address provided by the CPU1 and the physical address on the magnetic disc unit 2 is stored in the conversion table 5 of the unit 2, the table 5 is indexed by the logical address provided by the CPU1, the corresponding physical address is derived by the converting circuit 3, and it is sent to the head control circuit 6. In this case, at every logidal address from the CPU1, the access frequency against it is counted by the counter 4, and the physical address is assigned in order from the logical address whose access frequency is high, which has been derived by the counter 4. And, as for the subsequent operation, the physical address can be assigned against unequal access frequency without changing the service program of the CPU1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2276780A JPS56121161A (en) | 1980-02-27 | 1980-02-27 | Magnetic disc unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2276780A JPS56121161A (en) | 1980-02-27 | 1980-02-27 | Magnetic disc unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56121161A true JPS56121161A (en) | 1981-09-22 |
Family
ID=12091817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2276780A Pending JPS56121161A (en) | 1980-02-27 | 1980-02-27 | Magnetic disc unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56121161A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63271518A (en) * | 1987-04-28 | 1988-11-09 | Nec Corp | File control system |
JPH0239225A (en) * | 1988-07-28 | 1990-02-08 | Toshiba Corp | Filing system |
JPH09198195A (en) * | 1996-01-19 | 1997-07-31 | Nec Corp | Disk device capable of rearranging data |
JPH1195934A (en) * | 1997-09-22 | 1999-04-09 | Hitachi Ltd | Method for controlling information processing system |
-
1980
- 1980-02-27 JP JP2276780A patent/JPS56121161A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63271518A (en) * | 1987-04-28 | 1988-11-09 | Nec Corp | File control system |
JPH0239225A (en) * | 1988-07-28 | 1990-02-08 | Toshiba Corp | Filing system |
JPH09198195A (en) * | 1996-01-19 | 1997-07-31 | Nec Corp | Disk device capable of rearranging data |
JPH1195934A (en) * | 1997-09-22 | 1999-04-09 | Hitachi Ltd | Method for controlling information processing system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56121161A (en) | Magnetic disc unit | |
JPS5729124A (en) | Data transfer system by parallel bus | |
JPS5423335A (en) | Page detection mechanism | |
JPS5412656A (en) | Sequence control circuit | |
JPS53129547A (en) | Data processing system | |
JPS533121A (en) | Multi-item input unit | |
JPS5386140A (en) | Automatic altering device for priority | |
JPS53138646A (en) | Input/output unit | |
JPS545351A (en) | Control unit | |
JPS5354441A (en) | Switching unit for microprocessor | |
JPS5430745A (en) | File access control system | |
JPS5440538A (en) | Multiple data processor | |
JPS5380932A (en) | Input/output control unit | |
JPS5724963A (en) | Copying machine | |
JPS5374336A (en) | Switching unit | |
JPS57201924A (en) | Timer controlling device for computer | |
JPS5690360A (en) | Assignment method of base register | |
JPS5247351A (en) | Effective range display circuit | |
JPS52142440A (en) | Data processing system embodied partial purge function | |
JPS524804A (en) | Record player arm lifter | |
JPS53121439A (en) | Interrupt processor | |
JPS5274179A (en) | Compact air purifier | |
JPS5412642A (en) | Memory address control system for circulating memory unit | |
JPS53110439A (en) | Temporal stopping circuit for program counter | |
JPS525556A (en) | Time operating machine |