JPH0736638A - High-speed access device control system - Google Patents

Abstract

PURPOSE:To prevent data from being lost by power re-interruption during the use of a semiconductor memory after power restoration and to automatically release the degradation mode to realize the high-speed access by giving the battery monitor function to a controller and automatically releasing the degradation mode to set the operation mode at the time when a battery is fully charged by power restoration after power interruption. CONSTITUTION:At the time of power interruption, power from an uninterruptible power supply 8 is supplied to a semiconductor disk device 1 to save data from a semiconductor memory 2 to a backup disk device 3, and the degradation mode is set. At the time of power restoration, the backup disk device 3 is directly accessed correspondingly to the degradation mode set to the semiconductor disk device 1; and when a battery monitor function 7 detects power restoration and full charging of the battery in the uninterruptible power supply 8, the de-degradation mode is automatically released to set the operation mode, and the access is switched to the access of the semiconductor memory 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high speed access device control system for controlling the operation of a high speed access device.

[0002]

2. Description of the Related Art Generally, a semiconductor disk device operates in a volatile semiconductor memory 22 at the time of operation and saves data to a backup disk device 23 for storing data at the end of the operation, as shown in FIG. In addition to when the operation ends, backup is also performed when there is a system failure that does not result in a power failure or hardware down. Normally, the power supply is cut off at the time of a power failure, but there is one that is equipped with an uninterruptible power supply device inside the computer as a standard, and depending on its capacity after a power failure occurs, stable AC power can be supplied for several minutes to several tens of minutes.

When a semiconductor disk device and an uninterruptible power supply are combined and a power failure occurs during normal operation, the system is operated by the power supply from the battery of the uninterruptible power supply, while the data of the semiconductor disk is backed up by the disk device for back-up. Evacuate to. The configuration of FIG. 4 will be briefly described below.

FIG. 4 is an explanatory view of the prior art. In FIG. 4, a semiconductor disk device 21 is a high-speed readable / writable disk device, and includes a semiconductor memory 22 and a backup disk device 23.

The semiconductor memory 22 is a semiconductor readable and writable memory at high speed and loses its data when the power is cut off. The backup disk device 23 is a disk device such as a magnetic disk device that saves and stores the data in the semiconductor memory 22 and does not lose the data even when the power is cut off.

Next, the operation will be briefly described. FIG. 4A shows a state at the time of supply from a commercial power source. Power is supplied from this commercial power source to the semiconductor disk device 21,
During normal operation, as shown in the figure, data is written in the semiconductor memory 22, or data is read out and mutually transferred with a host (not shown). This allows
Since the semiconductor memory 22 that can read and write at high speed is used, it is possible to access the semiconductor disk device 21 at high speed.

FIG. 4B shows a state when the battery is supplied. When supply of power from the battery of the uninterruptible power supply to the semiconductor disk device 21 is started, data is saved from the semiconductor memory 22 to the backup disk device 23. This allows the semiconductor memory 2 in the event of a power failure.
The data on 2 can be saved and saved in the backup disk device 23 without loss.

[0008]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
As shown in, the data is saved from the semiconductor memory 22 to the backup disk device 23 while the power is supplied from the battery of the uninterruptible power supply, so that the data can be saved without loss at the time of power failure.

However, after the power is restored, if the battery (uninterruptible power supply) is recharged before it is sufficiently charged, the power cannot be supplied and the data in the semiconductor memory 22 is lost. . In order to solve this, the semiconductor disk device 21 has two modes, an operation mode for reading and writing data on the semiconductor memory 22 during operation, and a degenerate mode for directly reading and writing data on the backup disk device 23. prepare. When a power failure occurs and power is restored, the state of charge of the battery is unknown, so the battery is operated in the degenerate mode, and the backup disk device 23 is directly read / written to prevent the loss of data due to the decrease in the battery capacity. Then, when the power is turned off and then turned on again, it is considered that the battery is sufficiently charged, the degeneration mode is released and the operation mode is set, and high-speed access to the semiconductor memory 22 is enabled. In this solution,
There were the following problems.

Even after the commercial power is restored,
When the power is turned off again for some reason, the degenerate mode is canceled even though the battery is almost empty. In the case of a system that does not turn off the power such as 24-hour operation, the degeneration mode is not released, and when trying to release it, the power must be turned off once.

The present invention solves these problems.
The control device is provided with a battery monitoring function, and after the battery monitoring function loses power and restores power, when the battery is fully charged, the degeneration mode is automatically canceled and the operation mode is restored. The purpose is to prevent data loss due to re-power failure during use and realize high-speed access by automatically canceling the degenerate mode.

[0012]

FIG. 1 is a block diagram showing the principle of the present invention. In FIG. 1, the semiconductor disk device 1 is
A disk device that can access data at high speed,
It comprises a semiconductor memory 2 and a backup disk device 3.

The semiconductor memory 2 is a semiconductor memory that can read and write at high speed and loses data when the power is cut off. The backup disk device 3 is a disk device that is readable and writable and retains data even when the power is turned off.

The battery monitoring function 7 includes an uninterruptible power supply 8
After supplying power to the semiconductor disk device 1 during a power failure,
This is to monitor whether or not the battery is fully charged by recovering power and starting charging.

The uninterruptible power supply device 8 generates various power supplies by using electric power from a battery.

[0016]

According to the present invention, as shown in FIG. 1, the semiconductor memory device 2 is accessed and processed while commercial power is supplied to the semiconductor disk device 1, and the semiconductor power is supplied from the uninterruptible power supply device 8 in the event of a power failure. With the data supplied to the disk device 1, the data in the semiconductor memory 2 is backed up to the disk device 3
When the power is restored, the backup disk device 3 is directly accessed for processing, and the battery monitoring function 7 is not provided. The full charge of the battery of the power failure power supply 8 is monitored, and when the battery is fully charged, the degeneration mode is released to the normal mode, and the access to the semiconductor memory 2 is switched.

At this time, the predetermined time is a previously determined time required to fully charge the battery, and the degeneration mode is released after the elapse of this time. Therefore, the control device 4
To have a battery monitoring function 7, and when the battery monitoring function 7 has lost power and restored power, and has become fully charged after a lapse of a predetermined time or the like, degenerate the degeneration mode and automatically set the operation mode. As a result, it becomes possible to prevent loss of data due to a power failure again while the power is restored and the semiconductor memory 2 is in use, and to realize high-speed access by automatically canceling the degenerate mode.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the construction and operation of an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a block diagram showing the principle of the present invention. Figure 1
In the above, the semiconductor disk device 1 is a disk device which is provided as an external storage device and can be accessed at high speed, and includes a semiconductor memory 2 and a backup disk device 3.

The semiconductor memory 2 is a readable and writable semiconductor memory at high speed, and is a volatile memory in which data is lost when the power is cut off. The backup disk device 3 saves and stores the data in the semiconductor memory 2, and is a non-volatile magnetic disk device that retains the data even when the power is cut off.

The control unit 4 is a unit (CPU) which controls the semiconductor disk unit 1 such as accessing the semiconductor disk unit 1 and setting the degenerate mode and the operation mode. The control program 5, the power supply control 6, and the uninterruptible power supply. It is composed of a power supply device 8 and the like.

The control program 5 has a battery monitoring function 7
The semiconductor disk device 1 is set to the operation mode / degenerate mode, the semiconductor disk device 1 is access-controlled, etc.

The power source control 6 controls the power source to be supplied to the semiconductor disk device 1. Here, the power source controller 6 supplies power from a commercial power source (not shown) to the semiconductor disk device 1 or an uninterruptible power source at the time of power failure. It supplies power from the device 8 to the semiconductor disk device 1, monitors the full charge of the battery of the uninterruptible power supply device 8, and the like, and is composed of a battery monitoring function 7 or the like here. is there.

The battery monitoring function 7 includes an uninterruptible power supply 8
Is to monitor the charge state of the battery, and here, after the power is supplied to the semiconductor disk device 1 at the time of power failure, the charging time after power recovery has passed a predetermined time and the battery is fully charged. It is to monitor whether it has become.

The uninterruptible power supply 8 supplies the semiconductor disk device 1 with power generated from a built-in battery in the event of a power failure. When the power is restored, the battery of the uninterruptible power supply 8 is charged, and normally the battery is fully charged in about 10 hours.

Next, the operation of the configuration of FIG. 1 will be described. (1) The control device 4 sets a normal operation mode in the semiconductor disk device 1 and accesses the semiconductor memory 2 in the semiconductor disk device 1 to write or read data at high speed.

(2) When a power failure occurs during operation, the data in the semiconductor memory 2 in the semiconductor disk device 1 in the state where the control program instructs to supply power to the semiconductor disk device 1 from the uninterruptible power supply device 8. Is saved in the backup disk device 3, and the degenerate mode is set.

(3) After the power is restored, the semiconductor disk device 1 is supplied with commercial power to the semiconductor disk device 1.
In addition to directly accessing the backup disk device 3 therein, the charging of the battery of the uninterruptible power supply 8 is monitored, and the degeneration mode is released when the battery is fully charged after a predetermined time elapses. Corresponding to the release of the degenerate mode, the semiconductor memory 2 in the semiconductor disk device 1 is accessed to write or read data at high speed. Therefore, after the power is restored, even if the battery is not fully charged and the power is restored again and the power is restored, the degeneration mode will not be released, and the degeneration mode will not be released unless the time for fully charging the battery elapses. There is no need to release the semiconductor memory 2 under the operating mode to access it, and
You can avoid losing the data inside. The details will be sequentially described below.

FIG. 2 shows a block diagram of an embodiment of the present invention.
Here, the semiconductor disk device 1 and the uninterruptible power supply device 8
1 is the same as the configuration of FIG. Figure 2
In the control program 5, the semiconductor disk device 1
The following control is performed here.

Periodically monitor the timer status Accept an interrupt from the program control circuit 73. The degeneration mode is released for the semiconductor disk device 1. The battery monitoring function 7 is a function for monitoring the state of the battery, and includes a power failure detection circuit 71, a timer control circuit 72, a program control circuit 73, and N hours as shown in the figure. It is composed of a timer 73 and the like.

The power failure detection circuit 71 detects a power failure of the power supplied to the semiconductor disk device 1. The timer control circuit 72 sets the N time in the N time timer 74, counts the N time, and when the N time has passed by the N time timer 73 (after power recovery, the uninterruptible power supply 8
(When the predetermined time N, which is sufficient to fully charge the battery, has passed), the program control circuit 73 is notified that N hours have passed.

The program control circuit 73, for example, notifies the control program 5 when it is notified that N hours have passed. The N time timer 73 is a timer that measures the set N time.

Next, in the order of S1 to S13 of FIG. 3, the operation when a power failure occurs will be described in detail under the configuration of FIG.
In FIG. 3, in S1, a power failure occurs for some reason.

In step S2, the battery monitoring function 7 receives the notification from the uninterruptible power supply unit 8 that a power failure has occurred. S3
The battery monitoring function 7 notifies the control program (OS) 5 of a power failure.

In step S4, the control program 5, which has received the power failure notification in step S3, displays a message to the effect that a power failure has occurred on the screen to notify the administrator. In S5, the battery monitoring function 7 monitors time (to).

In S6, since the monitoring time t0 has passed, the fact that the time has been monitored is notified. In S7, the control program 5 starts the system close process. Since the monitoring time t0 has passed since the power failure, the system close processing is started.

In step S8, the degenerate mode is instructed and set in the semiconductor disk device 1. In S9, an instruction to save to the backup disk device 3 is given. In S10, the data is saved from the semiconductor memory 2 of the semiconductor disk device 1 to the backup disk device 3.

In step S11, the system close is completed.
In S12, the control program 5 notifies the battery monitoring function 7 of a normal end notification.

In S13, the battery monitoring function 7 disconnects the power from the uninterruptible power supply 8 to the semiconductor disk device 1. As described above, while the semiconductor memory 2 of the semiconductor disk device 1 is being accessed and processed, the commercial power supply is cut off, power is supplied from the battery of the uninterruptible power supply device 8 to the semiconductor disk device 1, and the operation is continued for a while. When the system is operated and the power failure occurs even after the monitoring time t0 has passed, the control program 5 is instructed to start the system close process, in which the data from the semiconductor memory 2 of the semiconductor disk device 1 is backed up to the disk device 3 for backup. The evacuation and degeneration modes are set in and the power from the uninterruptible power supply 8 is cut off. As a result, in the event of a power failure, the semiconductor disk device 1
The data in the semiconductor memory 2 can be saved in the backup disk device 3, and the degeneration mode is set.

Next, in the order of S21 to S25 of FIG.
The operation at power recovery under the configuration of FIG. 2 will be described in detail. In FIG. 3, since power is restored in S21, the power is turned on.

In step S22, the battery monitoring function 7 sets the N-hour timer 74 to N hours (charging time N at which the battery is fully charged) and starts counting down. S23
Determines whether the content N of the N time counter 74 has become zero. In the case of YES, the control program 5 is notified to that effect, and the control program 5 notifies the semiconductor disk device 1 of cancellation of the degenerate mode and resets. After that, it returns to the normal mode. On the other hand, if NO in S23, the process proceeds to S25.

In step S25, it is determined whether or not there is a power failure again. This is N
The time timer 73 discriminates whether or not a power failure has occurred again before the lapse of N hours in which the battery is fully charged. In the case of YES, the power failure has occurred again before N hours have passed, so S1
Return to. On the other hand, in the case of NO, the process returns to S23 and waits for N hours to elapse.

As described above, when the power is restored, the backup disk device 3 is directly accessed and processed in accordance with the degeneration mode set in the semiconductor disk device 1 according to the instruction of S8, and after the lapse of N hours, the uninterruptible power supply device. When the battery of No. 8 is fully charged, the degeneration mode is canceled in S24 to the normal mode, that is, the semiconductor memory 2 of the semiconductor disk device 1.
Access to perform high-speed writing and high-speed reading. With these, when the battery of the uninterruptible power supply 8 is fully charged, the degeneration mode is automatically released,
The normal operation mode, that is, the semiconductor memory 2 in the semiconductor disk device 1 can be accessed, the loss of data in the semiconductor memory 2 at the time of a power failure is prevented, and the degeneration mode is automatically set as soon as possible. It is possible to release it and return to the normal operation mode for high-speed access.

In the above embodiment, the uninterruptible power supply 8
It has been detected that the battery is fully charged when a predetermined time has elapsed after the battery was started to be charged, but in addition to this, it may be determined by predicting the full charge from the degree of increase in the battery voltage. . According to this, the state in which the battery is fully charged is detected even when the charging is started not from the completely discharged state of the battery but from the discharged state in the middle of the battery, and S2 of FIG. 3 is detected.
The degeneration mode may be canceled by assuming that N = 0 of 3 is set. In addition, the battery full charge is detected by other methods (for example, the history curve of the battery charge is saved,
Full charge is detected by detecting the rise of the battery voltage when starting charging from the current state or the voltage when reaching the maximum value and starting to fall).
You may make it the YES of 23.

[0045]

As described above, according to the present invention,
A configuration is adopted in which the control device 4 is provided with a battery monitoring function 7 and the degeneration mode is canceled and the operation mode is automatically set when the battery monitoring function 7 has lost power and has been restored for a predetermined time or more. Therefore, it is possible to realize high-speed access by preventing power loss due to re-power failure during power recovery and use of the semiconductor memory 2, and by automatically canceling the degenerate mode. As a result, it has become possible to improve the reliability and high speed of the semiconductor disk device 1.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of the present invention.

FIG. 4 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1: Semiconductor disk device 2: Semiconductor memory 3: Backup disk device 4: Control device 5: Control program 6: Power supply control 7: Battery monitoring function 8: Uninterruptible power supply device (battery)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Uehara 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Masafumi Sakita 2 shares of 98 Uno-nu, Unoku-cho, Kawakita-gun, Ishikawa Prefecture Company PFU

Claims (2)

[Claims] 1. A high-speed access device control method for controlling the operation of a high-speed access device, comprising: a semiconductor memory (2) capable of high-speed reading and writing and erasing data when power is cut off; and a backup capable of reading and writing and retaining data even when power is cut off. Disk device (3), a semiconductor disk device (1), an uninterruptible power supply device (8), such as a battery, for supplying power to the semiconductor disk device (1), and the uninterruptible power supply device (8) Has a battery monitoring function (7) for monitoring whether the battery is fully charged after supplying power to the semiconductor disk device (1) at the time of power failure and then restoring power and starting charging, Power is supplied from the power supply device (8) to the semiconductor disk device (1) to transfer data from the semiconductor memory (2) to the backup disk device (3). When the power is restored, the semiconductor disk device (1) is set to the degeneration mode and the semiconductor disk device (1) is directly accessed to the backup disk device (3) in response to the set degeneration mode to perform the battery monitoring function. (7)
Starts charging after power is restored, and when full battery of the uninterruptible power supply (8) is detected, the degeneration mode is automatically released to normal mode, and the semiconductor memory (2) is accessed. A high-speed access device control method having the above-mentioned configuration. 2. The high-speed access device control according to claim 1, wherein, as the detection of the full charge of the battery, a predetermined time (a pre-measured time required for the full charge) has elapsed after starting the battery charge. method.