JPH0425941A - Ipl resuming system - Google Patents

Ipl resuming system

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Publication number
JPH0425941A
JPH0425941A JP2130912A JP13091290A JPH0425941A JP H0425941 A JPH0425941 A JP H0425941A JP 2130912 A JP2130912 A JP 2130912A JP 13091290 A JP13091290 A JP 13091290A JP H0425941 A JPH0425941 A JP H0425941A
Authority
JP
Japan
Prior art keywords
ipl
external storage
stage
maintenance
initial program
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
JP2130912A
Other languages
Japanese (ja)
Inventor
Mitsuyoshi Ozaki
小崎　光義
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP2130912A priority Critical patent/JPH0425941A/en
Publication of JPH0425941A publication Critical patent/JPH0425941A/en
Pending legal-status Critical Current

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  • Stored Programmes (AREA)

Abstract

PURPOSE:To prevent the repetition of an IPL failure and to permit a maintenance operation device to normally operate even if there is abnormality in the content of an external storage device in one system by giving a stage storage memory storing an IPL(initial program load) stage, device state files deciding an IPL system and master slave flags. CONSTITUTION:An IPL device 2 reads the device state files 4 and the master slave flags 5 from the external storage devices 6 and 7 in both systems. When the state files 4 are accurate, the main system is decided from the main slave flags 5 and IPL is executed from the main system and the decided external storage devices 6 and 7. After IPL succeeds, the maintenance operation device 1 comes to an operation state. When IPL fails, the IPL stage is saved to the stage storage memory 3, the stage storage memory 3 is updated and the system is switched to the other one by the decision of the main system so as to execute IPL. Thus, the maintenance operation device 1 succeeds the operation even if the external storage device 6 or 7 in one system is abnormal after IPL completes, and the operation can be resumed from IPL from the other system when IPL fails.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はイニシャルプログラムロード（以下ＩＰＬ）再
開方式に関し、特に二重化された外部記憶装置を有する
交換システムにおける保守運用装置のＩＰＬ再開方式に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an initial program load (hereinafter referred to as IPL) restart method, and more particularly to an IPL restart method for a maintenance/operation device in a switching system having dual external storage devices.

〔従来の技術〕[Conventional technology]

第３図は従来のＩＰＬ再開方式の一例を示すブロック図
、第４図は従来例の動作手順を示すフローチャートであ
る。FIG. 3 is a block diagram showing an example of a conventional IPL restart method, and FIG. 4 is a flowchart showing the operation procedure of the conventional example.

同図に示すように従来の方式では、保守運用装置１のＩ
ＰＬの再開時に、ＩＰＬ装置２が０系外部記憶装置６と
１系外部記憶装置７内の装置状態ファイル４を参照しく
ステップ４１）、状態解析してＩＰＬ系を決定しくステ
ップ４２．４３）、ＩＰＬ成功後は保守運用装置１は運
用状態になり（ステップ４５）、両系の装置状態ファイ
ル４の内容が正常であれば、両系の外部記憶装置６，７
への同期した書込み処理を行い、両系の外部記憶装置６
．７より読込み動作を行っていた。As shown in the figure, in the conventional method, the I
When restarting the PL, the IPL device 2 refers to the device status file 4 in the 0-system external storage device 6 and the 1-system external storage device 7 (step 41), analyzes the status, and determines the IPL system (step 42.43), After the IPL is successful, the maintenance and operation device 1 becomes operational (step 45), and if the contents of the device status file 4 of both systems are normal, the external storage devices 6 and 7 of both systems
Performs synchronous write processing to the external storage device 6 of both systems.
．． The read operation was performed from 7 onwards.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来のＩＰＬ再開方式では、装置状態ファイル
４のみを参照するのでＩＰＬを失敗したときには同一の
系より再びＩＰＬを行うので、ＩＰＬ失敗を繰り返し、
またＩＰＬ成功後、保守運用装置が運用状態になると両
系の外部記憶装置６．７より読み込まれるので、片系の
外部記憶装置６７の内容でも異常であれば保守運用装置
１が正常に動作できないという欠点がある。In the conventional IPL restart method described above, only the device status file 4 is referred to, so when IPL fails, IPL is performed again from the same system, so IPL failure is repeated,
Furthermore, after a successful IPL, when the maintenance and operation equipment becomes operational, the data is read from the external storage devices 6.7 of both systems, so if the contents of the external storage device 67 of one system are abnormal, the maintenance and operation equipment 1 cannot operate normally. There is a drawback.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のＩＰＬ再開方式は、一つの保守運用装置と二重
化したＯ系、１系の外部記憶装置とを備える交換システ
ムの前記各外部記憶装置から前記保守運用装置が動作す
るためのプログラムをイニシャルロードするためのＩＰ
Ｌ装置と、ＩＰＬステージを記憶するためのステージ記
憶メモリと、前記外部記憶装置上に前記ＩＰＬ装置がＩ
ＰＬ系を決定するための装置状態ファイル及び主従フラ
グを有し、前記保守運用装置がＩＰＬ再開時に前記ＩＰ
Ｌ装置が前記外部記憶装置上の装置状態ファイルからＩ
ＰＬ系候補を決定し、前記主従フラグからＩＰＬ系を決
定してイニシャルプログラムロードを行ったのち、前記
保守運用装置は主系の前記外部記憶装置より読込みを行
い、イニシャルプログラムロードを失敗した場合にはＩ
ＰＬステージを前記ステージ記憶メモリに退避し、イニ
シャルプログラムロード実行中のステージの場合には他
系よりのイニシャルプログラムロードに切り替えてイニ
シャルプログラムロードを実行することを特徴とする。The IPL restart method of the present invention includes initial loading of a program for operating the maintenance and operation device from each of the external storage devices of a switching system that includes one maintenance and operation device and duplicated O system and 1 system external storage devices. IP for
L device, a stage storage memory for storing IPL stages, and an IPL device on the external storage device;
It has a device status file and a master/slave flag for determining the PL system, and the maintenance operation device uses the IP when restarting IPL.
The L device retrieves the I from the device status file on the external storage device.
After determining a PL system candidate, determining an IPL system from the master/slave flag, and performing an initial program load, the maintenance operation device reads from the external storage device of the main system, and if the initial program load fails, is I
The present invention is characterized in that the PL stage is saved in the stage storage memory, and in the case of a stage in which an initial program load is being executed, the initial program load is executed by switching to an initial program load from another system.

〔実施例〕〔Example〕

次に本発明について第１図、第２図を参照して説明する
。Next, the present invention will be explained with reference to FIGS. 1 and 2.

第１図は本発明のＴＰＬ再開方式の一実施例を示すブロ
ック図、第２図は本実施例の動作手順を示すフローチャ
ートである。FIG. 1 is a block diagram showing an embodiment of the TPL restart method of the present invention, and FIG. 2 is a flowchart showing the operating procedure of this embodiment.

第１図において従来例と同じ構成要素には第３図と同じ
符号を付しである。In FIG. 1, the same components as in the conventional example are given the same reference numerals as in FIG.

保守運用装置１下のｒＰＬ装置２はＯ系外部記憶装置６
と１系外部記憶装置７から装置状態ファイル４を読み込
み、装置状態ファイル４の内容からＩＰＬ系候補を決定
し、次に主従フラグ５からＩＰＬ系を決定する０本実施
例ではＩＰＬ失敗時にＩＰＬステージを退避するための
ステージ記憶メモリ３が設けられている。The rPL device 2 under the maintenance operation device 1 is an O-system external storage device 6
reads the device status file 4 from the 1-system external storage device 7, determines the IPL system candidate from the contents of the device status file 4, and then determines the IPL system from the master/slave flag 5.0 In this embodiment, when IPL fails, the IPL stage is A stage storage memory 3 is provided for saving.

次に本実施例の動作について第２図を併用して説明する
。Next, the operation of this embodiment will be explained with reference to FIG.

ＩＰＬ装置２は両系の外部記憶装置６，７から装置状態
ファイル４と主従フラグ５を読み込み（ステップ２１）
、状態解析を行い（ステップ２２）、両系の外部記憶装
置６．７の状態ファイル４が正しい場合は主従フラグ５
より主系を決定しくステップ２３）、主系と決定した外
部記憶装置６７よりＩＰＬを行い（ステップ２５）、Ｉ
ＰＬ成功後はくステップ２６）、保守運用装置１は両系
の外部記憶装置６，７へ書込みを行ない、主系の外部記
憶装置６，７のみから読込み処理を行う運用状態に入る
（ステップ２７）。The IPL device 2 reads the device status file 4 and master/slave flag 5 from the external storage devices 6 and 7 of both systems (step 21).
, the state is analyzed (step 22), and if the state files 4 of the external storage devices 6.7 of both systems are correct, the master/slave flag 5 is set.
Step 23) to determine the main system, perform IPL from the external storage device 67 determined to be the main system (step 25),
After the PL is successful, in step 26), the maintenance and operation device 1 writes to the external storage devices 6 and 7 of both systems, and enters an operational state in which it performs reading processing only from the external storage devices 6 and 7 of the main system (step 27). ).

またステップ２６でＪＰＬを失敗したときはＩＰＬステ
ージをステージ記憶メモリ３へ退避してステージ記憶メ
モリ３を更新しくステップ２４）、ステージ記憶メモリ
３の内容がＩＰＬ実行中であれば、主系決定で他系へ切
り替えてからＩＰＬを行う。Also, if JPL fails in step 26, the IPL stage is saved to the stage storage memory 3 and the stage storage memory 3 is updated (step 24). If the contents of the stage storage memory 3 indicate that IPL is being executed, the main system is determined Perform IPL after switching to another system.

これにより、ＩＰＬ完了後に片系の外部記憶装置６また
は７が異常でも保守運用装置１は動作を継続でき、また
ＩＰＬ失敗時に他系からのＩＰＬにより再開を行うこと
ができる。Thereby, even if the external storage device 6 or 7 of one system is abnormal after IPL is completed, the maintenance and operation device 1 can continue operation, and when IPL fails, it can be restarted by IPL from another system.

なお第２図において、ステップ２１〜ステツプ２３を状
態解析ステージ、ステップ２４〜ステツプ２６をＩＰＬ
実行ステージ、ステップ２７を運用ステージと名付けて
いる。In FIG. 2, steps 21 to 23 are state analysis stages, and steps 24 to 26 are IPL stages.
The execution stage, step 27, is named the operation stage.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、装置状態ファイルよりＩ
ＰＬ系候補を決定した後、主従フラグよりＩＰＬ系を決
定し、ＩＰＬ成功後は主系外部記憶装置のみから読込み
を行うことにより、また工ＰＬを失敗したときはＩＰＬ
ステージをステージ記憶メモリに退避し、装置状態ファ
イルからＩＰＬ系候補を決定した後、退避したステージ
記憶メモリからＩＰＬ系の切替えを行うことによりＩＰ
Ｌ成功後に片系の外部記憶装置が異常でも保守運用装置
は動作を継続でき、またＩＰＬ失敗時に他系からのＩＰ
Ｌにより再開を行うことができる効果がある。As explained above, the present invention enables I
After determining the PL system candidates, the IPL system is determined from the master/slave flag, and after the IPL is successful, by reading only from the main system external storage device, and when the engineering PL fails, the IPL system is
After saving the stage to the stage storage memory and determining an IPL system candidate from the device status file, the IPL system is switched from the saved stage storage memory.
Even if the external storage device of one system is abnormal after L is successful, the maintenance and operation equipment can continue to operate, and if IPL fails, the
L has the effect of allowing restart.

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

第１図は本発明のＩＰＬ再開方式の一実施例を示すブロ
ック図、第２区は本実施例の動作手順を示すフローチャ
ート、第３図は従来のＩＰＬ再開方式の一例を示すブロ
ック図、第４図は従来例の動作手順を示すフローチャー
トである。 １・・・保守運用装置、２・・・ＩＰＬ装置、２・・・
ステージ記憶メモリ、 ４・・・装置状態ファイル、 ５・・・主 従フラグ、 ６・・・０系外部記憶装置、 ７・・・１系外部 記憶装置。FIG. 1 is a block diagram showing an embodiment of the IPL restart method of the present invention, Section 2 is a flowchart showing the operating procedure of this embodiment, and FIG. 3 is a block diagram showing an example of the conventional IPL restart method. FIG. 4 is a flowchart showing the operating procedure of the conventional example. 1... Maintenance operation device, 2... IPL device, 2...
Stage storage memory, 4... Device status file, 5... Master/slave flag, 6... 0 system external storage device, 7... 1 system external storage device.

Claims (1)

【特許請求の範囲】[Claims] 一つの保守運用装置と二重化した０系、１系の外部記憶
装置とを備える交換システムの前記各外部記憶装置から
前記保守運用装置が動作するためのプログラムをイニシ
ャルロードするためのＩＰＬ装置と、ＩＰＬステージを
記憶するためのステージ記憶メモリと、前記外部記憶装
置上に前記ＩＰＬ装置がＩＰＬ系を決定するための装置
状態ファイル及び主従フラグを有し、前記保守運用装置
がＩＰＬ再開時に前記ＩＰＬ装置が前記外部記憶装置上
の装置状態ファイルからＩＰＬ系候補を決定し、前記主
従フラグからＩＰＬ系を決定してイニシャルプログラム
ロードを行ったのち、前記保守運用装置は主系の前記外
部記憶装置より読込みを行い、イニシャルプログラムロ
ードを失敗した場合にはＩＰＬステージを前記ステージ
記憶メモリに退避し、イニシャルプログラムロード実行
中のステージの場合には他系よりのイニシャルプログラ
ムロードに切り替えてイニシャルプログラムロードを実
行することを特徴とするＩＰＬ再開方式。An IPL device for initially loading a program for operating the maintenance and operation device from each of the external storage devices of a switching system comprising one maintenance and operation device and duplicated 0-system and 1-system external storage devices; The IPL device has a stage storage memory for storing stages, and a device state file and a master/slave flag for the IPL device to determine the IPL system on the external storage device, and when the maintenance operation device restarts IPL, the IPL device After determining an IPL system candidate from the device status file on the external storage device, determining an IPL system from the master/slave flag, and performing an initial program load, the maintenance operation device starts reading from the external storage device of the main system. and if the initial program load fails, save the IPL stage to the stage storage memory, and if the stage is in the process of executing the initial program load, switch to the initial program load from another system and execute the initial program load. An IPL restart method characterized by:
JP2130912A 1990-05-21 1990-05-21 Ipl resuming system Pending JPH0425941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2130912A JPH0425941A (en) 1990-05-21 1990-05-21 Ipl resuming system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2130912A JPH0425941A (en) 1990-05-21 1990-05-21 Ipl resuming system

Publications (1)

Publication Number Publication Date
JPH0425941A true JPH0425941A (en) 1992-01-29

Family

ID=15045645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2130912A Pending JPH0425941A (en) 1990-05-21 1990-05-21 Ipl resuming system

Country Status (1)

Country Link
JP (1) JPH0425941A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7168006B2 (en) 2003-06-30 2007-01-23 International Business Machines Corporation Method and system for saving the state of integrated circuits upon failure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7168006B2 (en) 2003-06-30 2007-01-23 International Business Machines Corporation Method and system for saving the state of integrated circuits upon failure

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