JPS54133852A - Channel-command retrying system - Google Patents

Channel-command retrying system

Info

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
Application number
JP4158378A
Other languages
Japanese (ja)
Inventor
Toshio Awaji
Masanari Hata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP4158378A priority Critical patent/JPS54133852A/en
Publication of JPS54133852A publication Critical patent/JPS54133852A/en
Pending legal-status Critical Current

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
JP4158378A 1978-04-08 1978-04-08 Channel-command retrying system Pending JPS54133852A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5118298A (en) * 1974-08-06 1976-02-13 Dowa Mining Co HEIKAIROHOSHIKINYORU DAIICHITETSUIONNO SANKAHO

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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