JPS58223828A - Control adaptor switching system of input and output subsystem - Google Patents

Control adaptor switching system of input and output subsystem

Info

Publication number
JPS58223828A
JPS58223828A JP57108030A JP10803082A JPS58223828A JP S58223828 A JPS58223828 A JP S58223828A JP 57108030 A JP57108030 A JP 57108030A JP 10803082 A JP10803082 A JP 10803082A JP S58223828 A JPS58223828 A JP S58223828A
Authority
JP
Japan
Prior art keywords
circuit
control
control adapter
adapter
adaptor
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
JP57108030A
Other languages
Japanese (ja)
Inventor
Motoyuki Nagasaka
長坂　基行
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
Original Assignee
Fujitsu Ltd
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 filed Critical Fujitsu Ltd
Priority to JP57108030A priority Critical patent/JPS58223828A/en
Publication of JPS58223828A publication Critical patent/JPS58223828A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
    • G06F11/0745—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in an input/output transactions management context
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Hardware Redundancy (AREA)

Abstract

PURPOSE:To reduce the load of a high-order device and to improve the efficiency of an information processing system, by using a substitute control adaptor to accept actuation although the control adaptor of one side has a fault. CONSTITUTION:A selecting circuit 25 for control adaptor A selects a control adaptor A3 and a driver 5 through a low-order interface circuit 24. If the adaptor A3 has a fault, the actuation of the device 5 has an abnormal completion. When an error detecting circuit 23 detects the abnormal completion, the circuit 23 reports the abnormal completion to an upper device 1 from a high-order interface circuit 21 and through an error reporting circuit 22. At the same time, the circuit 23 actuates an adaptor switch circuit 27. Then a selecting circuit 26 for control adaptor B selects a control adaptor B4 and the driver 5 through the circuit 24.

Description

【発明の詳細な説明】 （ａ）発明の技術分野 本発明は制御装置と制御アダプタ及び駆動装置より構成
される入出力サブシステムに於て、制御アダプタの如き
２重化された部分に於ける障害発生時の切替方式の改善
に関する。Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to an input/output subsystem consisting of a control device, a control adapter, and a drive device. Related to improving the switching method when a failure occurs.

（ｂ）従来技術と問題点 制御装置と制御アダプタ及び駆動装置より構成される入
出力サブシステムの駆動装置を上位装置が起動する場合
は、該上位装置は制御装置、制御アダプタ及び駆動装置
を指定して起動を行う。第１図は入出力サブシステムの
一構成例を示す。１つの駆動装置に対して制御アダプタ
は２台が設けられている。従来、上位装置ｌが駆動装置
５又゛は６を起動する場合に９例えば上位装置ｌは制御
装置２と制御アダプタＡ３と駆動装置５又は６を指定し
て起動するが、若し制御アダプタＡ３が故障してしてい
ると制御アダプタＢ４があるにも拘わらず起動が異常終
了するため、上位装置ｌは制御アダプタＢ４を指定して
再度起動を行う必要があった。上記入出力サブシステム
を例えば磁気ディスクサブシステムで説明すると、上位
装置ｌは中央処理装置のチャンネルであり、制御装置２
は磁気ディスク制御装置、制御アダプタＡ３及び制御ア
ダプタＢ４は磁気ディスク制御アダプタ、駆動装置５，
６は磁気ディスク装置に夫々該当する。(b) Prior art and problems When a host device starts up a drive device of an input/output subsystem consisting of a control device, a control adapter, and a drive device, the host device specifies the control device, control adapter, and drive device. and start it. FIG. 1 shows an example of the configuration of an input/output subsystem. Two control adapters are provided for one drive device. Conventionally, when the host device 1 starts up the drive device 5 or 6, for example, the host device 1 specifies and starts the control device 2, control adapter A3, and drive device 5 or 6, but if the control adapter A3 If the control adapter B4 is out of order, the startup ends abnormally even though the control adapter B4 is present, so the host device l had to specify the control adapter B4 and restart it. If we explain the above input/output subsystem using, for example, a magnetic disk subsystem, the host device 1 is a channel of the central processing unit, and the control device 2
is a magnetic disk control device, control adapter A3 and control adapter B4 are magnetic disk control adapters, drive device 5,
6 corresponds to a magnetic disk device.

磁気ディスクサブシステムではチャンネルは複数あり磁
気デスク制御装置山複数でクロスコールをする為前記の
様な再起動は情報処理システムの効率を低下させる欠点
がある。Since the magnetic disk subsystem has multiple channels and multiple magnetic disk controllers perform cross calls, restarting as described above has the drawback of reducing the efficiency of the information processing system.

（Ｃ）発明の目的 本発明の目的は上記欠点を除く為、制御アダプタの障害
を制御装置が検出して切り替える事により、上位装置の
再起動を防止して情報処理システムの効率を向上させる
入出力サブシステムに於ける制御アダプタ切替方式を提
供することにある。(C) Object of the Invention In order to eliminate the above-mentioned drawbacks, the object of the present invention is to improve the efficiency of the information processing system by having the control device detect a fault in the control adapter and switch it over, thereby preventing the restart of the host device. An object of the present invention is to provide a control adapter switching method in an output subsystem.

（ｄ）発明の構成 本発明の構成は制御アダプタ及び駆動装置より構成され
る入出力サブシステムに於て、制御装置に制御アダプタ
の上位装置よりの起動に対する異常終了を検出する手段
と、６該制御アダプタを切り替える手段とを備え、異常
終了検出により制御アダプタを切り替えて上位装置の再
起動動作を不要とする様にしたものである。(d) Structure of the Invention The structure of the present invention is that in an input/output subsystem composed of a control adapter and a drive device, the control device is provided with means for detecting abnormal termination in response to activation from a host device of the control adapter; The control adapter is equipped with means for switching the control adapter, and the control adapter is switched upon detection of abnormal termination, thereby eliminating the need for restarting the host device.

（ｅ）発明の実施例 第２図は本発明の一実施例を示す回路のプロ・ンｉ　　
　　　　　り図である。本回路は第１図に示す制御装置
２に実装される。上位装置１が制御装置２と制御アダプ
タＡ３と駆動装置５を指定して駆動装置５を起動すると
、制御装置２の上位インタフェース回路２１を通った信
号はアダプタ切替回路２７を通って制御アダプタ切替回
路２５を動作させる。制御アダプタＡ選択回路２５は下
位インタフェース回路２４を通して制御アダプタＡ３と
駆動装置５とを選択する。ここで制御アダプタＡ３が故
障していると、該駆動装置５の起動は前記の如く異常終
了する。下位インタフェース回路２４を通してエラー検
出回路２３が該異常終了を検出すると。(e) Embodiment of the invention FIG. 2 shows a circuit diagram showing an embodiment of the invention.
This is a diagram. This circuit is implemented in the control device 2 shown in FIG. When the host device 1 specifies the control device 2, control adapter A3, and drive device 5 and starts the drive device 5, the signal that has passed through the host interface circuit 21 of the control device 2 passes through the adapter switching circuit 27 to the control adapter switching circuit. Operate 25. The control adapter A selection circuit 25 selects the control adapter A3 and the drive device 5 through the lower interface circuit 24. If the control adapter A3 is out of order here, the activation of the drive device 5 ends abnormally as described above. When the error detection circuit 23 detects the abnormal termination through the lower interface circuit 24.

エラー検出回路２３はエラー報告回路２２を通じて上位
インタフェース回路２１より上位装置ｌに報告すると共
にアダプタ切替回路２７を動作させて、制御アダプタＢ
選択回路２６を使用し、制御アダプタＢ選択回路２６は
下位インタフェース回路２４を通して制御アダプタＢ４
と駆動装置５とを選択する０以上の如く動作する事によ
り故障している制御アダプタを入出力サブシステム内で
自動的に使用しない様にすることが出来る。The error detection circuit 23 sends a report from the upper level interface circuit 21 to the higher level device l through the error reporting circuit 22, and also operates the adapter switching circuit 27 to switch the control adapter B.
Using the selection circuit 26, the control adapter B selection circuit 26 selects the control adapter B4 through the lower interface circuit 24.
By selecting zero or more of the drive device 5 and the drive device 5, it is possible to automatically prevent a malfunctioning control adapter from being used in the input/output subsystem.

尚本実施例はハードにより賀施したがマイクロプログラ
ムを用いたソフトでも実現し得ることは勿論である。Although this embodiment is based on hardware, it goes without saying that it can also be implemented using software using microprograms.

（ｆ）発明の詳細 な説明した如く本発明は制御アダプタの障害を制御装置
が検出して自動的に切り替える為、一方の制御アダプタ
に障害があっても代りの制御アダプタを使用して起動を
受は付けることにより上位装置の負担を軽減し、情報処
理システムの効率を向上させることが出来るので、その
効果は大なるものがある。(f) As described in detail, in the present invention, the control device detects a failure in a control adapter and automatically switches the adapter, so even if one control adapter has a failure, the alternative control adapter can be used for startup. By adding a receiver, the burden on the host device can be reduced and the efficiency of the information processing system can be improved, so the effect is significant.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は入出力サブシステムの一構成例を示す図、第２
°図は本発明の一実施例を示す回路のブロック図である
。 １は上位装置、２は制御装置、３は制御アダプタＡ、４
は制御アダプタＢ、５．６は駆動装置。 ２１は上位インタフェース回路、２２はエラー報告回路
、２３はエラー検出回路、２４は下位インタフェース回
路、２５は制御アダプタＡ選択回路。 ２６は制御アダプタＢ選択回路、２７はアダプタ切替回
路である。Figure 1 shows an example of the configuration of the input/output subsystem;
3 is a block diagram of a circuit showing an embodiment of the present invention. 1 is the host device, 2 is the control device, 3 is the control adapter A, 4
is the control adapter B, and 5.6 is the drive device. 21 is an upper interface circuit, 22 is an error reporting circuit, 23 is an error detection circuit, 24 is a lower interface circuit, and 25 is a control adapter A selection circuit. 26 is a control adapter B selection circuit, and 27 is an adapter switching circuit.

Claims (1)

【特許請求の範囲】[Claims] 制御装置と制御アダプタ及び駆動装置より構成される入
出力サブシステムに於て、制御装置に制御アダプタの上
位装置よりの起動に対する異常終了を検出する手段と、
該制御アダプタを切り替える手段とを備え、異常終了検
出により制御アダプタを切り替えて上位装置の再起動動
作を不要とするこトラ特徴とする入出力サブシステムに
於ける制御アダプタ切替方式。In an input/output subsystem composed of a control device, a control adapter, and a drive device, the control device includes means for detecting abnormal termination of activation of the control adapter from a host device;
A control adapter switching method in an input/output subsystem, comprising means for switching the control adapter, and switching the control adapter upon detection of abnormal termination, thereby eliminating the need for restarting a host device.
JP57108030A 1982-06-23 1982-06-23 Control adaptor switching system of input and output subsystem Pending JPS58223828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57108030A JPS58223828A (en) 1982-06-23 1982-06-23 Control adaptor switching system of input and output subsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57108030A JPS58223828A (en) 1982-06-23 1982-06-23 Control adaptor switching system of input and output subsystem

Publications (1)

Publication Number Publication Date
JPS58223828A true JPS58223828A (en) 1983-12-26

Family

ID=14474173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57108030A Pending JPS58223828A (en) 1982-06-23 1982-06-23 Control adaptor switching system of input and output subsystem

Country Status (1)

Country Link
JP (1) JPS58223828A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5111537A (en) * 1974-07-19 1976-01-29 Fuji Electric Co Ltd

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5111537A (en) * 1974-07-19 1976-01-29 Fuji Electric Co Ltd

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