JPH04256047A - Disk device - Google Patents
Disk deviceInfo
- Publication number
- JPH04256047A JPH04256047A JP3017219A JP1721991A JPH04256047A JP H04256047 A JPH04256047 A JP H04256047A JP 3017219 A JP3017219 A JP 3017219A JP 1721991 A JP1721991 A JP 1721991A JP H04256047 A JPH04256047 A JP H04256047A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- backup power
- disk device
- electronic disk
- voltage drop
- 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
- 230000015654 memory Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000004321 preservation Methods 0.000 abstract 1
- 230000009977 dual effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Power Sources (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はディスク装置に関し、特
に記憶部にダイナミック・ランダム・アクセス・メモリ
を使用したディスク装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device, and more particularly to a disk device using a dynamic random access memory in its storage section.
【０００２】0002
【従来の技術】従来のディスク装置は、記憶部にダイナ
ミック・ランダム・アクセス・メモリを使用した場合、
バックアップ電源を備えることは行われている。しかし
、バックアップ電源の電圧低下に対しては何等の対策も
講じないか、電圧低下を検出する電圧低下検出手段を設
け、電圧低下を検出すると警報を出すのみで、それ以上
の動作を行うことはなかった。[Prior Art] When a conventional disk device uses dynamic random access memory in its storage section,
Providing backup power sources is being done. However, either no measures are taken against voltage drops in the backup power supply, or a voltage drop detection means is installed to detect voltage drops, and when a voltage drop is detected, an alarm is issued, but no further action is taken. There wasn't.
【０００３】0003
【発明が解決しようとする課題】上述した従来のディス
ク装置は、記憶部にダイナミック・ランダム・アクセス
・メモリを使用した場合、バックアップ電源の電圧低下
に対しては何等の対策も講じないか、電圧低下を検出す
と警報を出すのみで、それ以上の動作を行うことがない
ので、二重化してあるシステムであっても、保守者の対
応が遅れると両系の記憶部のデータが消滅してしまうと
いう問題点がある。[Problems to be Solved by the Invention] When the above-mentioned conventional disk devices use dynamic random access memory in the storage section, they either do not take any measures against the voltage drop of the backup power supply, or If a drop is detected, a warning is issued and no further action is taken, so even if the system is redundant, if maintenance personnel are late in responding, the data in the storage sections of both systems will be lost. There is a problem with storing it away.
【０００４】本発明の目的は、バックアップ電源の電圧
低下を検出すると、この電圧の低下したバックアップ電
源を記憶部から切離し、他方の電子ディスク装置の記憶
部のバックアップ電源に並列接続することのできる、メ
モリ・バックアップ時間の延長が可能なディスク装置を
提供することにある。[0004] An object of the present invention is to detect a voltage drop in the backup power supply, to disconnect the backup power supply whose voltage has dropped from the storage unit, and connect it in parallel to the backup power supply of the storage unit of the other electronic disk device. An object of the present invention is to provide a disk device capable of extending memory backup time.
【０００５】[0005]
【課題を解決するための手段】本発明のディスク装置は
、第１および第２の電子ディスク装置で同一データを保
持する二重書きサブシステムとし、前記第１および第２
の電子ディスク装置のデータを保持する記憶部の構成部
品をダイナミック・ランダム・アクセス・メモリとし、
前記記憶部ごとに電源障害時の記憶保持を支えるバック
アップ電源を備えるディスク装置において、前記バック
アップ電源の電圧低下を検出する電圧低下検出手段と、
前記電圧低下検出手段がいずれか一方の電圧低下を検出
したときこの電圧の低下したバックアップ電源を記憶部
から切離し他方の電子ディスク装置の記憶部のバックア
ップ電源に並列接続する電源接続手段を備える構成であ
る。[Means for Solving the Problems] A disk device of the present invention is a dual writing subsystem in which first and second electronic disk devices hold the same data, and the first and second electronic disk devices
A component of the storage unit that holds data of the electronic disk device is a dynamic random access memory,
In a disk device including a backup power source for supporting memory retention in the event of a power failure for each storage unit, a voltage drop detection means for detecting a voltage drop in the backup power source;
When the voltage drop detection means detects a voltage drop in either one, the backup power supply whose voltage has decreased is disconnected from the storage unit and connected in parallel to the backup power supply of the storage unit of the other electronic disk device. be.
【０００６】[0006]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。Embodiments Next, embodiments of the present invention will be described with reference to the drawings.
【０００７】図１は本発明の一実施例のブロック図であ
る。FIG. 1 is a block diagram of one embodiment of the present invention.
【０００８】ディスク装置１は、電子ディスク装置２，
３で同一データを保持する二重書きサブシステムを構成
し、電子ディスク装置２，３は、それぞれメモリ回路４
，５と電源制御部６，７とを備え、電子ディスク装置２
，３間には、電源制御インタフェース８を設けてある。
電源制御部６，７は、それぞれバックアップ電源９，１
０と、バックアップ電源９，１０の電位を基準電位と比
較し基準電位より低くなると論理“１”を出力する電圧
比較器１１，１２と、自系と他系のバックアップ電源の
電位を比較し自系が他系より低くなると論理“１”を出
力する電圧比較器１３，１４と、電圧比較器１１，１３
又は１２，１４の出力と電子ディスク装置３又は２のバ
ックアップ電源が正常であることを出力の条件とするＡ
ＮＤ回路１５，１６と、ＡＮＤ回路１５，１６の出力を
受け動作するラッチング・リレー１７，１８と、バック
アップ電源９，１０同士の電流の逆流防止用ダイオード
１９，２０を備えている。The disk device 1 includes an electronic disk device 2,
3 constitutes a dual writing subsystem that holds the same data, and the electronic disk devices 2 and 3 each have a memory circuit 4.
, 5 and power control units 6, 7, the electronic disk device 2
, 3, a power supply control interface 8 is provided between them. The power supply control units 6 and 7 are connected to backup power supplies 9 and 1, respectively.
0, and voltage comparators 11 and 12 that compare the potentials of the backup power supplies 9 and 10 with a reference potential and output logic "1" when the potential becomes lower than the reference potential, and voltage comparators 11 and 12 that compare the potentials of the backup power supplies of the own system and other systems and output the logic "1". Voltage comparators 13 and 14 output logic "1" when the voltage of the system is lower than that of other systems, and voltage comparators 11 and 13
Or A, where the output condition is that the outputs of 12 and 14 and the backup power supply of the electronic disk device 3 or 2 are normal.
It includes ND circuits 15 and 16, latching relays 17 and 18 that operate in response to the outputs of AND circuits 15 and 16, and diodes 19 and 20 for preventing current from flowing backward between backup power supplies 9 and 10.
【０００９】次にバックアップ電源の電圧低下発生時の
動作について説明する。電圧低下は電子ディスク装置２
側に発生したものとする。Next, the operation when a voltage drop occurs in the backup power supply will be explained. The voltage drop is due to electronic disk device 2.
It is assumed that the occurrence occurred on the side.
【００１０】バックアップ電源９，１０の電位が基準電
位より低くなると、電圧比較器１１は、論理“１”を出
力する。このとき、電子ディスク装置３側が正常であれ
ば、電圧比較器１３の出力も又論理“１”を出力し、ラ
ッチング・リレー１８も動作していないので、ＡＮＤ回
路１５は論理“１”を出力しラッチング・リレー１７を
動作させる。ラッチング・リレー１７が動作すれば、メ
モリ回路４を切り離しバックアップ電源９を電子ディス
ク装置３側のバックアップ電源１０と並列に接続する。
メモリ回路４，５は、基準電位以下となってもしばらく
は正常に動作できるので、この切替えにより、電子ディ
スク装置３側での電源電圧低下発生に対して、メモリ回
路５がこれまでより約２倍の余裕を持つことができるよ
うになる。When the potentials of the backup power supplies 9 and 10 become lower than the reference potential, the voltage comparator 11 outputs logic "1". At this time, if the electronic disk device 3 side is normal, the output of the voltage comparator 13 also outputs logic "1", and since the latching relay 18 is also not operating, the AND circuit 15 outputs logic "1". latching relay 17 is operated. When the latching relay 17 operates, the memory circuit 4 is disconnected and the backup power supply 9 is connected in parallel with the backup power supply 10 on the electronic disk device 3 side. Since the memory circuits 4 and 5 can operate normally for a while even if the voltage drops below the reference potential, this switching allows the memory circuit 5 to operate approximately 2 times faster than before when the power supply voltage drops on the electronic disk device 3 side. You will now have twice as much leeway.
【００１１】[0011]
【発明の効果】以上説明したように、本発明は、二重書
きサブシステムのディスク装置の記憶部をダイナミック
・ランダム・アクセス・メモリで構成し、記憶部ごとに
電源障害時の記憶保持を支えるバックアップ電源を備え
、バックアップ電源の電圧低下を検出すると、この電圧
の低下したバックアップ電源を記憶部から切離し、他方
の電子ディスク装置の記憶部のバックアップ電源に並列
接続することにより、メモリ・バックアップ時間の延長
が可能となるという効果が有る。As explained above, the present invention configures the storage section of the disk device of the dual write subsystem with dynamic random access memory, and supports memory retention in the event of a power failure for each storage section. When equipped with a backup power supply and detecting a voltage drop in the backup power supply, the backup power supply whose voltage has dropped is disconnected from the storage unit and connected in parallel to the backup power supply of the storage unit of the other electronic disk device, thereby shortening the memory backup time. This has the effect of allowing extension.
【図１】本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
１ ディスク装置
２，３ 電子ディスク装置
４，５ メモリ回路
６，７ 電源制御部
８ 電源制御インタフェース
９，１０ バックアップ電源
１１，１２，１３，１４ 電圧比較器１５，１６
ＡＮＤ回路1 Disk devices 2, 3 Electronic disk devices 4, 5 Memory circuits 6, 7 Power supply control section 8 Power supply control interfaces 9, 10 Backup power supplies 11, 12, 13, 14 Voltage comparators 15, 16
AND circuit
Claims (1)
同一データを保持する二重書きサブシステムとし、前記
第１および第２の電子ディスク装置のデータを保持する
記憶部の構成部品をダイナミック・ランダム・アクセス
・メモリとし、前記記憶部ごとに電源障害時の記憶保持
を支えるバックアップ電源を備えるディスク装置におい
て、前記バックアップ電源の電圧低下を検出する電圧低
下検出手段と、前記電圧低下検出手段がいずれか一方の
電圧低下を検出したときこの電圧の低下したバックアッ
プ電源を記憶部から切離し他方の電子ディスク装置の記
憶部のバックアップ電源に並列接続する電源接続手段を
備えることを特徴とするディスク装置。1. A dual-write subsystem that holds the same data in a first and second electronic disk device, wherein components of a storage section that holds data in the first and second electronic disk devices are dynamically written. In a disk device that is a random access memory and is provided with a backup power supply for supporting memory retention in the event of a power failure for each storage section, a voltage drop detection means for detecting a voltage drop of the backup power supply; A disk device characterized by comprising power supply connection means for disconnecting the backup power source whose voltage has decreased from the storage section when detecting a voltage drop in one of the electronic disk devices and connecting it in parallel to the backup power source of the storage section of the other electronic disk device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3017219A JPH04256047A (en) | 1991-02-08 | 1991-02-08 | Disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3017219A JPH04256047A (en) | 1991-02-08 | 1991-02-08 | Disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04256047A true JPH04256047A (en) | 1992-09-10 |
Family
ID=11937834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3017219A Pending JPH04256047A (en) | 1991-02-08 | 1991-02-08 | Disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04256047A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7538818B2 (en) | 2001-07-02 | 2009-05-26 | Fujifilm Corporation | Digital camera use in connection with a mobile electronic device |
-
1991
- 1991-02-08 JP JP3017219A patent/JPH04256047A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7538818B2 (en) | 2001-07-02 | 2009-05-26 | Fujifilm Corporation | Digital camera use in connection with a mobile electronic device |
| US7911530B2 (en) | 2001-07-02 | 2011-03-22 | Fujifilm Corporation | Digital camera and system capable of sharing power with a mobile device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8074112B1 (en) | Memory backup used in a raid system | |
| JP5317360B2 (en) | Computer program, system, and method for thresholding system power loss notification in a data processing system | |
| US8374049B2 (en) | DIMM memory module reference voltage switching circuit | |
| US9705321B1 (en) | Power source redundancy in a power supply | |
| US20050071690A1 (en) | Dynamic power redundancy using online current measurement | |
| CN109144778A (en) | A kind of storage server system and its backup method, system and readable storage medium storing program for executing | |
| CA1166352A (en) | Backup power circuit for biasing bit lines of a static semiconductor memory | |
| CN109582498A (en) | Data protection circuit and guard method when a kind of CPLD powered-off fault | |
| JPH04256047A (en) | Disk device | |
| JPS5829327A (en) | Power source | |
| CN116048192A (en) | Clock backup circuit, control method, system, device, medium and server | |
| US8020019B2 (en) | Managing voltage supply in multiple linked systems | |
| JP3169859B2 (en) | Parallel operation power supply control method | |
| US4800532A (en) | Circuit arrangement with a processor and at least two read-write memories | |
| WO2007077585A1 (en) | Computer system comprising at least two servers and method of operation | |
| JP2003309936A (en) | Power source system | |
| JPS6256538B2 (en) | ||
| JPH07211066A (en) | Memory system with backup function | |
| JP2018097739A (en) | Computer system | |
| JPS62140153A (en) | Duplicated data processor | |
| JPH04252344A (en) | Computer system | |
| JPS61169036A (en) | System supervisory device | |
| JPH01102658A (en) | File write back-up system | |
| JPH0453060A (en) | Mirrored disk device | |
| JPH04361344A (en) | Storage circuit |