STORAGE DEVICE, AND STORAGE DEVICE CONTROL METHOD

• US 20130205173A1
• Filed: 12/11/2012
• Published: 08/08/2013
• Est. Priority Date: 02/03/2012
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: YONEDA, Yusuke
• Application Number:
  US13/710,522
• Publication Number:
  US 20130205173A1
• Time in Patent Office: Days
• US Class Current: 714/47.2
• 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 11/076 by exceeding a count or rate limit, e.g. word- or bit count limit
• CPC Class Codes: G06F 11/079 Root cause analysis, i.e. error or fault diagnosis in a hardware test environment G06F11/22; in a software test environment G06F11/36
• CPC Class Codes: G06F 11/3034 where the computing system component is a storage system, e.g. DASD based or network based digital input from or digital output to record carriers G06F3/06; digital recording or reproducing 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 11/3055 Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available error or fault processing without redundancy G06F11/0703; error detection or correction by redundancy in data representation G06F11/08; error detection or correction by redundancy in operation G06F11/14; error detection or correction by redundancy in hardware G06F11/16
• CPC Class Codes: G06F 11/3409 for performance assessment

Abstract

A storage device, which performs input/output processing on a memory device through a relay apparatus, includes a memory and a processor coupled to the memory. The processor executes a process including: determining whether or not a cumulative value accumulated according to occurrence of error in the memory device during the input/output processing reaches a predetermined threshold value; comparing when the determined cumulative value is greater than or equal to the threshold value, number of input/output processing on the memory device with number of input/output processing on another memory device mounted on the relay apparatus, and determining whether or not there is a bias; determining when the bias is determined, whether or not a connection status is normal with respect to the relay apparatus; and detaching when it is determined that the connection status of the relay apparatus is normal, the connection to the memory device.

Claims

1. A storage device, which performs input/output processing on a memory device through a

relay apparatus, the storage device comprising:

a memory; and

a processor coupled to the memory, wherein the processor executes a process comprising;

determining whether or not a cumulative value accumulated according to occurrence of error in the memory device during the input/output processing reaches a predetermined threshold value;

comparing when the determined cumulative value is greater than or equal to the threshold value, number of input/output processing on the memory device with number of input/output processing on another memory device mounted on the relay apparatus, and determining whether or not there is a bias;

determining when the bias is determined, whether or not a connection status is normal with respect to the relay apparatus; and

detaching when it is determined that the connection status of the relay apparatus is normal, the connection to the memory device.

2. The storage device according to claim 1, wherein the detaching includes detaching, when no bias is determined, the connection to the memory device.

3. The storage device according to claim 1, wherein the determining whether or not a connection status is normal includes determining, when the determined cumulative value of a certain relay apparatus is greater than or equal to the threshold value, whether or not a connection status is normal with respect to entire relay apparatuses located above the relay apparatus, and

the detaching includes detaching a connection to a relay apparatus located at the highest position among the relay apparatuses, of which the connection is determined as abnormal.

4. The storage device according to claim 1, wherein the determining whether or not a connection status is normal determines, when it is determined that the connection status of the relay apparatus mounted with the memory device being greater than or equal to the threshold value is abnormal, whether or not a connection status is normal with respect to entire relay apparatuses located above the relay apparatus, and

the detaching detaches a connection to a relay apparatus located at the highest position among the relay apparatuses, of which the connection is determined as abnormal.

5. A method for controlling a storage device that performs input/output processing on a memory device through a relay apparatus, the method comprising:

determining whether or not a cumulative value accumulated according to occurrence of error in the memory device during the input/output processing reaches a predetermined threshold value, using a processor;

comparing when the determined cumulative value is greater than or equal to the threshold value, number of input/output processing on the memory device with number of input/output processing on another memory device mounted on the relay apparatus, and determining whether or not there is a bias, using the processor;

determining when the bias is determined, whether or not a connection status is normal with respect to the relay apparatus, using the processor; and

detaching when it is determined that the connection status of the relay apparatus is normal, the connection to the memory device, using the processor.

6. A computer-readable recording medium having stored therein a program for controlling a storage device that performs input/output processing on a memory device through a relay apparatus, the program causing the storage device to execute:

determining whether or not a cumulative value accumulated according to occurrence of error in the memory device during the input/output processing reaches a predetermined threshold value;

comparing when the determined cumulative value is greater than or equal to the threshold value, number of input/output processing on the memory device with number of input/output processing on another memory device mounted on the relay apparatus, and determining whether or not there is a bias;

determining when the bias is determined, whether or not a connection status is normal with respect to the relay apparatus; and

detaching when it is determined that the connection status of the relay apparatus is normal, the connection to the memory device.