STORAGE CONTROL DEVICE AND METHOD THEREFOR

• US 20180232307A1
• Filed: 02/01/2018
• Published: 08/16/2018
• Est. Priority Date: 02/10/2017
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Oota, Yuusuke
• Granted Patent: US 10,642,674 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24
• CPC Class Codes: G06F 11/0727 in a storage system, e.g. in a DASD or network based storage system drivers for digital recording or reproducing units G06F3/06; circuits for error detection or correction within digital recording or reproducing units G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: G06F 11/073 in a memory management context, e.g. virtual memory or cache management memory management G06F12/00; testing of static memory units G11C29/00
• CPC Class Codes: G06F 11/0754 by exceeding limits
• CPC Class Codes: G06F 11/0778 Dumping, i.e. gathering error/state information after a fault for later diagnosis
• CPC Class Codes: G06F 11/0793 Remedial or corrective actions recovery from an exception in an instruction pipeline G06F9/3861; by retry G06F11/1402; for recovering from a failure of a protocol instance or entity H04L69/40
• CPC Class Codes: G06F 11/1441 Resetting or repowering
• CPC Class Codes: G06F 11/1471 involving logging of persistent data for recovery
• CPC Class Codes: G06F 11/2015 Redundant power supplies power supply failure G06F1/30
• CPC Class Codes: G06F 11/3037 where the computing system component is a memory, e.g. virtual memory, cache accessing, addressing or allocating within memory systems or architectures G06F12/00; checking stores for correct operation G11C29/00
• CPC Class Codes: G06F 11/3058 Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations thermal management in cooling arrangements of a computing system G06F1/206
• CPC Class Codes: G06F 11/3062 where the monitored property is the power consumption power management in a computing system G06F1/3203
• CPC Class Codes: G06F 12/0804 with main memory updating G06F12/0806 takes precedence

Abstract

When a power failure of a volatile first storage occurs, an apparatus detects the power failure, and writes backup target data in a non-volatile second storage. When an abnormality of the first storage occurs, the apparatus detects the abnormality, acquires second information including a hardware state at a time when the abnormality is detected, and writes the first information and the second information in the second storage. When an abnormality occurs during the writing the backup target data, the apparatus suspends the writing the backup target data, acquires the second information, and writes backup data and the second information in the second storage, where the backup data is the backup target data that has not been written to the second storage.

Claims

1. A storage control device comprising:

a first memory that is a volatile storage configured to store backup target data, the backup target data including first information on control of a storage device;

a second memory that is a non-volatile storage; and

a processor coupled to the first and second memories, the processor configured to execute one or more of;

power failure processing in which the processor detects a power failure and writes the backup target data in the second memory,

abnormality processing in which the processor detects an abnormality other than the power failure, acquires second information on a state of hardware at time of detection of the abnormality, and writes the first information and the second information in the second memory, and

power failure suspension backup processing in which the processor detects the abnormality during execution of the power failure processing, suspends the power failure processing, acquires the second information, and writes backup data, the backup data having not been written in the second memory in the power failure processing, of the backup target data and the second information in the second memory.

2. The storage control device according to claim 1, wherein the processor executes abnormality suspension backup processing in which the processor writes the first information and the second information in the second memory after the processor stores the second information in the first memory in the abnormality processing, and, in a case where the processor detects the power failure during execution of the abnormality processing, the processor suspends the abnormality processing and writes all data stored in the first memory in the second memory.

3. The storage control device according to claim 2, wherein

the processor is further configured to monitor whether or not the power failure has occurred, wherein

the processor monitors whether or not the monitoring device has detected the power failure during execution of the abnormality processing, and when the processor has detected the power failure, the processor detects the power failure and suspends the abnormality processing by the abnormality suspension backup processing.

4. The storage control device according to claim 1, further comprising a third memory that stores the second information, wherein

the processor acquires the second information from the third memory in the abnormality processing or the power failure suspension backup processing.

5. The storage control device according to claim 1, wherein the processor creates writing information in the power failure processing and specifies data of the backup target data based on the writing information in the power failure suspension backup processing, the writing information indicating a writing state of the backup target data into the second memory and the data having not been written in the second memory in the power failure processing.

6. The storage control device according to claim 1, wherein in a case where the processor detects power recovery of the storage control device, the processor acquires the first information and the second information from the second memory and creates analysis information for analyzing the abnormality based on the first information and the second information.

7. A non-transitory, computer-readable recording medium having stored therein a program for causing a computer to execute a process of controlling a storage device, the process comprising:

executing power failure processing that detects a power failure in a volatile first storage configured to store backup target data and writes the backup target data in a non-volatile second storage, the backup target data including first information on control of the storage device;

executing abnormality processing that detects an abnormality other than the power failure, acquires second information on a state of hardware at time of detection of the abnormality, and writes the first information and the second information in the second storage; and

upon detecting the abnormality during execution of the power failure, executing power failure suspension backup processing that suspends the power failure processing, acquires the second information, and writes backup data, the backup data having not been written in the second storage in the power failure processing, of the backup target data and the second information in the second storage.

8. A storage control device comprising:

a volatile first memory configured to store backup target data including first control information of a storage device;

a non-volatile second memory; and

a processor coupled to the volatile first memory and the non-volatile second memory, the processor configured to execute a process including;

when a power failure of the volatile first memory occurs,

detecting the power failure; and

writing the backup target data in the non-volatile second memory;

when an abnormality of the volatile first memory occurs,

detecting the abnormality;

acquiring second information including a hardware state at a time when the abnormality is detected; and

writing the first information and the second information in the non-volatile second memory;

when an abnormality occurs during the writing the backup target data,

suspending the writing the backup target data;

acquiring the second information; and

writing backup data and the second information in the non-volatile second memory, the backup data being the backup target data that has not been written to the non-volatile second memory.

9. A method of controlling a storage control device, the method comprising:

when a power failure of a volatile first storage occurs,

detecting the power failure; and

writing backup target data in a non-volatile second storage;

when an abnormality of the volatile first storage occurs,

detecting the abnormality;

acquiring second information including a hardware state at a time when the abnormality is detected; and

writing the first information and the second information in the non-volatile second storage;

when an abnormality occurs during the writing the backup target data,

suspending the writing the backup target data;

acquiring the second information; and

writing backup data and the second information in the non-volatile second storage, the backup data being the backup target data that has not been written to the non-volatile second storage.