JPS54133852A - Channel-command retrying system - Google Patents
Channel-command retrying systemInfo
- Publication number
- JPS54133852A JPS54133852A JP4158378A JP4158378A JPS54133852A JP S54133852 A JPS54133852 A JP S54133852A JP 4158378 A JP4158378 A JP 4158378A JP 4158378 A JP4158378 A JP 4158378A JP S54133852 A JPS54133852 A JP S54133852A
- Authority
- JP
- Japan
- Prior art keywords
- command
- channel
- retrying
- execution
- request signal
- 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
- Retry When Errors Occur (AREA)
Abstract
PURPOSE: To make a system fit to various input-output devices by making a decision between the retrying of a command in process of execution and that from a channel command which can be retried tracing back to the past, when a channel- command retrying request signal is transmitted.
CONSTITUTION: Error detection part 5 is provided which sends out a channel- command retrying request signal to data channel unit 3 when magnetic disc unit 4 is in trouble during the execution of a channel command. In addition, unit 3 is equipped with a channel-command buffer in process of execution at that time and a command buffer stored with channel commands. By analyzing a channel command in process of execution at that time when the channel-command retrying request signal is transmitted, decision circuit 7 makes a decision between the retrying of the command in process of execution at that time and that from the channel command which can be retried tracing back to the past. Therefore, the system of simple constitution can be made fit to various input-output devices.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4158378A JPS54133852A (en) | 1978-04-08 | 1978-04-08 | Channel-command retrying system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4158378A JPS54133852A (en) | 1978-04-08 | 1978-04-08 | Channel-command retrying system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54133852A true JPS54133852A (en) | 1979-10-17 |
Family
ID=12612447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4158378A Pending JPS54133852A (en) | 1978-04-08 | 1978-04-08 | Channel-command retrying system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54133852A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57212516A (en) * | 1981-06-25 | 1982-12-27 | Fujitsu Ltd | Retry controlling method of data transfer between devices |
JPS5872228A (en) * | 1981-10-23 | 1983-04-30 | Hitachi Ltd | Fault processing system for data processing system |
JPS6020237A (en) * | 1983-07-14 | 1985-02-01 | Nec Corp | Disk controller |
JPH01103734A (en) * | 1987-10-16 | 1989-04-20 | Hitachi Ltd | Disk controller |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5118298A (en) * | 1974-08-06 | 1976-02-13 | Dowa Mining Co | HEIKAIROHOSHIKINYORU DAIICHITETSUIONNO SANKAHO |
-
1978
- 1978-04-08 JP JP4158378A patent/JPS54133852A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5118298A (en) * | 1974-08-06 | 1976-02-13 | Dowa Mining Co | HEIKAIROHOSHIKINYORU DAIICHITETSUIONNO SANKAHO |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57212516A (en) * | 1981-06-25 | 1982-12-27 | Fujitsu Ltd | Retry controlling method of data transfer between devices |
JPS5872228A (en) * | 1981-10-23 | 1983-04-30 | Hitachi Ltd | Fault processing system for data processing system |
JPS6213702B2 (en) * | 1981-10-23 | 1987-03-28 | Hitachi Ltd | |
JPS6020237A (en) * | 1983-07-14 | 1985-02-01 | Nec Corp | Disk controller |
JPH01103734A (en) * | 1987-10-16 | 1989-04-20 | Hitachi Ltd | Disk controller |
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