JPH03278213A - Method for detecting and informating power supply status transition of extended storage device - Google Patents

Abstract

PURPOSE:To monitor only the 1st power supply and to recognize the status of the 2nd power supply and after by means of status reports by detecting the power supply status transition of storage devices connected in series by a host device and allocating device numbers to respective storage devices to output status reports. CONSTITUTION:When the power supply of one extended storage device 41 is turned on and the other extended storage device 42 is turned from OFF to ON in a state integrated in a system, a power supply control circuit 152 changes a power supply determining signal 2002 from '0' to '1'. A power supply monitoring circuit 121 recognizes the change of the power supply determining signal, sends a status code '10' to a status reporting circuit 161, sends a status report 3001 prepared by allocating a device number '1' to its own extended storage device 41 while referring a device number register 141 to a processor 2 through a system control device 1. The processor 2 recognizes the ON state of the power supply of the device 42 and executes the integrating processing of the device 42.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention has a plurality of expansion storage devices connected in series, and the highest expansion storage device among these expansion storage devices is connected to a system control device. The present invention relates to a method for detecting and reporting power state transition of an extended storage device in a connected information processing device.

[Conventional technology] In supercombuques that perform large-scale scientific and technical calculations, the scale of the problems to be solved is large, and it is difficult to store all the necessary data on the main memory. A large-capacity extended storage device that can perform high-speed data transfer with the storage device is provided, and data that cannot be stored on the main storage device is stored on this extended storage device.

Furthermore, although the capacity of expanded storage devices has been increasing in recent years, it is now necessary to connect multiple expanded storage devices in systems where the capacity of one expanded storage device is insufficient. However, since expanded storage devices require a large amount of data bus in the system control unit to achieve high-speed data transfer, it is physically difficult to connect multiple expanded storage devices directly to the system control unit. are connected to each other in series.

FIG. 3 is a block diagram of an information processing apparatus including such a plurality of expanded storage devices.

This information processing device includes a processor 2, a main storage device 3, and n extended storage devices 24. ．．
242. ..., 24n, and a system control device 21 connected to the processor 2, main storage device 3, and extended storage device 241.

Regarding environmental abnormalities (temperature abnormalities, etc.) within each expanded storage device 241 to 24n, each expanded storage device 241 to 24n uses the path used for data transfer status report to report via the upper expanded storage device (extended storage device). In the case of the storage device 241, the information is directly reported to the system control device 21, and the system control device 21 reports it to the processor 2. In addition, regarding changes in the power state of the own device (from on to off, from off to on) that cannot be detected within each extended storage device 241 to 24n, each extended storage device 241 to 24n sends a power confirmation signal 1001 to 100n, respectively. sent to the system control device 21,
The system control unit 21 checks the power confirmation signals 100, -100n of the extended storage devices 24□-24n, and reports to the processor 2 if a change occurs.

[Problems to be Solved by the Invention] The conventional method for detecting and reporting power state transitions of expanded storage devices described above requires adding paths for power supply confirmation signals or connecting connectable paths in response to an increase in the number of expanded storage devices. Since it is necessary to assume the number of expanded storage devices in advance and provide paths for that number from the beginning, as the number of expanded storage devices increases, the physical quantity of the system control device (interface for power supply confirmation signal) increases. There is a drawback.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for detecting and reporting a power state transition of an extended storage device, which requires only one interface for a power confirmation signal of a system control device, regardless of the number of extended storage devices.

[Means for Solving the Problems] The power state transition detection/reporting method for an extended storage device of the present invention detects when the power state of each extended storage device has changed from OFF to ON or from ON to OFF. If the extended storage device is the highest-level expanded storage device, the system controller detects it, and if the expanded storage device is not the highest-level expanded storage device, it is detected in the upper expanded storage bag adjacent to the expanded storage device, and the expanded storage device that detected the power state transition. sends a status report with its own device number attached to the detected content to the system control device if the expanded storage device is the highest-level expanded storage device.
If the extended storage device is not the highest-level expanded storage device, the expanded storage device transmits the status report to a higher-level expanded storage device adjacent to the expanded storage device, and the expanded storage device that has received the status report transmits the status report to the expanded storage device that is the highest-level expanded storage device. If it is a device, it is sent as is to the system control device, and if it is not the highest extended storage device, it is sent as is to the upper extended storage device adjacent to the extended storage device.

[For use] The system controller detects the transition of the power state of each extended storage device whether it is a higher-order extended storage device adjacent to that extended storage device and reports the status with the device number of the own device. It is only necessary to monitor the power state of the upper extended storage device, and the number of interfaces for power supply confirmation signals is significantly reduced.

``Example'' Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of an information processing device to which the power state transition detection and reporting method for an extended storage device according to the present invention is applied, and FIG. 2 is a configuration of the system control device 41 and 42 in FIG. 1. FIG.

This information processing device includes a processor 2, a main storage device 3, and n extended storage devices 4. ．． 4
2. ..., 4n, and a system control device 1 connected to a processor 2, a main storage device 3, and an expansion storage device 4.

Expanded storage device 4i (i=1.2..., n-1)
The storage unit 10i, the data transfer control circuit 111, the power supply monitoring circuit 12i, the environmental abnormality detection circuit 13i, the device number register 14i, the power supply control circuit 15i, and the status reporting circuit 1
6i, and the extended storage device 4n includes a storage section Ion, a data transfer control circuit 11n, an environmental abnormality detection circuit 13n, a device number register 14n, a power supply control circuit 15n, and a status reporting circuit 16n. In FIG. 2, only the configurations of extended storage devices 41 and 42 are shown for convenience.

The storage units 101 to Ion hold data.

Data transfer control circuits 111 to lln each have a storage unit 1.
0. ~Reading data from Ion or storage unit 10
□ ~ Writes data to the Ion, and also relays data transfer between the higher-level expanded storage device (system control device 1 in the case of expanded storage device 41) and the lower-level expanded storage device, and also writes the status code " Transfer status reports of 00°゛ are sent to the status reporting circuits 161 to 161, respectively.
16n. The power supply control circuits 151 to 15n control the power supply of the extended storage devices 41 to 4n, respectively, and in the case of the power supply control circuit 151, they indicate the power state (off/on) to the system control device 1 (when off,
0°°, °°1°° when on) power confirmation signal 200
1, and in the case of the power supply control circuits 152 to 15n, the power supply monitoring circuits 12 of the extended storage devices 41 to 4n-1 respectively
Power confirmation signal 2002 indicating the power state from 1 to 12n-1
~20On is sent. Power supply monitoring circuit 121 to 12n-
1 monitors the power supply confirmation signals 2002 to 20On sent out from the power supply control circuits 152 to 15n, respectively, and
If the power status code changes from ゛ to °'1" (off to on), the power status code of °°10°° is changed to "1".
to "0"f (from on to off), '°1
A power status code of 1° is sent to the status reporting circuits 161 to 16n-1, respectively. When the environmental abnormality detection circuits 131 to 13n detect a temperature abnormality or the like in the expansion storage devices 4□ to 4n, they send an environmental status code of "01" to the status reporting circuits 161 to 16n, respectively.
Send to. Device number registers 141-14n hold device numbers 1-n of extended storage devices 41-4n, respectively. The status reporting circuit 161 receives a power status code and an environmental status code, such as a transfer status code from the data transfer control circuit 11°, a power status code from the power monitoring circuit 121, and an environmental status code from the environmental abnormality detection circuit 131. If so, add device number 1 of device number register 141 and send status report 3.
001 is sent to the system control device 1, and if a status report 3002 is received from the extended storage device 42, it is relayed as is and sent to the system control device 1. Similarly to the status report circuit 161, the status report circuits 162 to 16n also send out status reports 3002 to 300n to the status report circuits 161 to 16n-1 of the extended storage devices 41 to 4n-1, respectively. It goes without saying that the status report circuit 16n of the lowest extended storage device 4n does not receive the power status code and the status report from the lower extended storage device. The following table summarizes the status codes input to the status reporting circuits 161 to 16n and their contents.

Next, the operation of this embodiment will be explained.

For example, if the expanded storage device 41 is already powered on, and the expanded storage device 41 is installed in the system, and the expanded storage device 42 is turned on from an OFF state, the power control circuit 152 Confirmation signal 2o02 °
Change from ゛0゛ to °°1°°. Expanded storage device 41
The power supply monitoring circuit 121 in the
When it reaches 0”-°°1°°, the change is recognized by the leading edge differential, and a status code indicating the power status is off-on is generated.
10'' to the status report circuit 161, the status report circuit 16. refers to the device number register 141, attaches the device number of the self-expandable storage device 41, and sends the status report 3001. The processor 2 reports that the power has changed from OFF to ON due to the status code ``10°'', and that the second expanded storage device 42, which is the second expanded storage device, has the device number ``i''. It recognizes that the power has been turned on and performs installation processing of the extended storage device 42. Also, when the power of the extended storage device 42 is turned off from on, the power confirmation signal 2002 changes from °l°" in the same way. When it changes to °°0°, the power supply monitoring circuit 12□ recognizes the change by trailing edge differentiation, and sends a status report 3001 with the status code "I I" indicating the power state on/off and the device number "I" added. , the processor 2 sends the extended storage device 42
recognizes that the power has been turned off and performs troubleshooting.

[Effects of the Invention] As described above, the present invention allows an upper-level extended storage device to detect transitions in the power states of a plurality of extended storage devices connected in series, and to report the status by assigning a device number. Accordingly, the system control device only monitors the power state of the first extended storage device, and the second and subsequent devices can be recognized by status reports, which has the effect of reducing the number of interfaces for the system control device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of an information processing apparatus to which the power state transition reporting method for an expanded storage device according to the present invention is applied, and FIG. 2 is a block diagram of an information processing device 4, . FIG. 3 is a block diagram of a conventional example of an information processing device. 1.21...System control device, 2...
・Processor 3...Main storage device, 10, . 102 11, , 1 2 12, , 2 □ 131.3. 14, , 42 151, 52 161, 6 2

Claims (1)

[Claims] 1. In an information processing device that has a plurality of extended storage devices connected in series, and in which the highest extended storage device among these extended storage devices is connected to a system control device, each If the expanded storage device is the highest-level expanded storage device, the system controller will notify that the power of the expanded storage device has changed from OFF to ON or from ON to OFF. The expanded storage device that detects the power state transition in the higher-level expanded storage device adjacent to the storage device sends a status report with its own device number attached to the detected content to the expanded storage device that is the highest-level expanded storage device. If so, to the system controller,
If the extended storage device is not the highest-level expanded storage device, the expanded storage device transmits the status report to a higher-level expanded storage device adjacent to the expanded storage device, and the expanded storage device that has received the status report transmits the status report to the expanded storage device that is the highest-level expanded storage device. A method for detecting and reporting a power state transition of an extended storage device, in which the power state transition detection and reporting method for an extended storage device is sent as is to a system control device if the device is a device, and to a higher-order extended storage device adjacent to the extended storage device if the device is not the highest system control device.