JP2011227709A - Raid controller device, raid device, and processing method and program for raid device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a RAID controller device, a RAID device, and a processing method and program for the RAID device capable of minimizing the temperature difference in each hard disk, and lengthening the life of each hard disk.SOLUTION: AN RAID controller device 5 comprises: a temperature information acquisition part 6 which is provided corresponding to each hard disk 2 and acquires temperature information; a reading destination hard disk determination part 7 for determining a hard disk having lower temperature from the paired hard disks 2 as a reading destination hard disk based on the temperature information; and a logical drive access processing part 8 which can write the same data in the paired hard disks 2 and selectively reads data from the reading destination hard disk determined by the reading destination hard disk determination part 7 from among the paired hard disks 2.

Description

  The present invention relates to a RAID controller device that combines hard disks that store virtual storage unit configuration information in advance and operates as a single logical virtual storage unit, a RAID device including the RAID controller device, a RAID device processing method, and a program.

  Conventionally, a technique called RAID (Redundant Array of Inexpensive Disks) is used to prevent data loss due to a failure of a storage medium such as a hard disk and to improve input / output processing performance (see, for example, Patent Document 1). ). RAID is a technology for operating a plurality of redundant hard disks virtually as a single hard disk. By making data redundant, even if a hard disk fails, there is no loss of data as a whole. Technology.

  Normally, when RAID is applied to a computer, a device called a RAID controller performs data configuration and management of the hard disk. When a hard disk fails, the RAID controller detects a hard disk failure, logically separates the failed hard disk, and operates the computer using another hard disk. When the user replaces the disconnected hard disk with a hard disk that has not failed, the RAID controller reproduces the information on the original hard disk from the information on the other hard disks, and writes the reproduced information on the replaced hard disk. Perform reconfiguration.

JP 2008-234385 A

  By the way, the plurality of hard disks constituting the RAID device may be unevenly heated due to the difference in the access amount to each hard disk. In addition, when the place where the RAID device is installed has a biased temperature environment, the temperature may differ depending on the hard disk due to the relative positional relationship between the hard disks. Specifically, this is a case where another device serving as a heat source is arranged at a biased position with respect to the RAID device. If the temperature differs depending on the hard disk, there is a problem that the hard disk with a high temperature has a reduced life compared to another hard disk with a relatively low temperature.

  The present invention has been made in view of the above-described circumstances, and can provide a RAID controller device, a RAID device, and a RAID device that can extend the life of each hard disk while minimizing the temperature difference between the hard disks. The processing method and program are provided.

The present invention employs the following means in order to solve the above problems.
The present invention relates to a RAID controller device that combines hard disks for storing configuration information of virtual storage means in advance in a pair and operates as one logical virtual storage means, corresponding to each of the hard disks. A temperature information acquisition unit configured to acquire temperature information of the hard disk, and based on the temperature information acquired by the temperature information acquisition unit, the lower temperature of the paired hard disks is set as a reading destination hard disk The same data can be written to the hard disk that makes a pair with the hard disk determination unit that determines the read destination and is selectively selected from the read hard disks determined by the read hard disk determination unit among the hard disks that make a pair A logical drive access processing unit for reading data To.

  The present invention also relates to a processing method of a RAID apparatus that combines hard disks that store configuration information of virtual storage means in advance to make a pair, and operates as one logical virtual storage means, each of the hard disks And a temperature information acquisition unit provided corresponding to each of the hard disk temperature information corresponding to the temperature information acquisition unit, and a reading destination hard disk determination unit based on the acquired temperature information. Determining a lower temperature as a reading hard disk, and a logical drive access processing unit selectively selects data from the reading hard disk determined by the reading hard disk determination unit among the paired hard disks. And a step of performing reading.

  In addition, the program of the present invention combines a hard disk that stores the configuration information of the virtual storage unit in advance in a pair so that a RAID controller device that operates as one logical virtual storage unit corresponds to each of the hard disks. A temperature information acquisition unit configured to acquire temperature information of the hard disk, and, based on the temperature information acquired by the temperature information acquisition unit, the lower one of the paired hard disks is selected as a reading destination hard disk The same data can be written to the hard disk forming a pair and the read hard disk determined by the read hard disk determining unit is selected from the paired hard disks. As a logical drive access processing unit that reads data automatically And wherein the operating.

  According to the present invention, the logical drive access processing unit reads data at the lower temperature of the paired hard disks, thereby minimizing the temperature difference between the hard disks and reducing the length of each hard disk. Life can be extended.

It is a perspective view which shows the outline | summary of the RAID apparatus of embodiment of this invention. It is a block diagram which shows the outline | summary of the RAID controller apparatus of embodiment of this invention. It is a perspective view which shows the outline | summary of the RAID apparatus of embodiment of this invention.

An embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the RAID device 1 of this embodiment includes a plurality of hard disks 2 that store configuration information of virtual storage means, and cooling for cooling the hard disks 2 while accommodating these hard disks 2. A housing 3 having a supply port 3a for supplying wind A, a cooling fan 4 provided in the supply port 3a, and a RAID controller device 5 for controlling the hard disk 2 are provided.

  In the present embodiment, 12 hard disks 2 are mounted, supported by a rack 3b provided in the housing 3, and having three rows in the height direction Z and four rows in the left-right direction X, with a gap between them. Are arranged. The RAID level of the hard disk 2 operates by mirroring (RAID 1) under the control of the RAID controller device 5, and a total of six logical drives 21 to 26 are configured.

  In the present embodiment, each of the six hard disks 2 divided into two in the left-right direction X is combined to form a pair, and each logical drive 21 to 26 is configured. In the following, in each of the logical drives 21 to 26, the hard disks that make a pair are given the symbols a and b to the logical drive symbols 21 to 26, and the hard disks 21a, 21b, 22a, 22b, 23a, 23b, 24a / 24b, 25a / 25b, 26a / 26b are displayed. Each hard disk 2 has a function of generating SMART information. The SMART information includes temperature information of the hard disk 2, information on usage time, information on errors, and the like.

  Further, two supply ports 3a of the housing 3 are formed in the left-right direction X, and a cooling fan 4 is provided for each. Then, by driving the cooling fan 4, it is possible to supply the cooling air A from the outside to the inside of the housing 3 through the supply port 3 a. The cooling air A supplied to the inside of the housing 3 is sent in the air blowing direction Y orthogonal to the left-right direction X and the height direction Z to cool the hard disk 2 through the gap between the hard disks 2, and then externally Is discharged.

  As shown in FIG. 2, the RAID controller device 5 includes a SMART function unit 6 that acquires SMART information of the hard disk 2 and a reading hard disk that determines a reading hard disk that performs read processing based on temperature information included in the SMART information. A determination unit 7 and a logical drive access processing unit 8 that performs access processing to the target logical drives 21 to 26 in response to an access request from the opposite server 100 are provided. The SMART function unit 6 is provided corresponding to each hard disk 2, periodically acquires SMART information of the corresponding hard disk 2, and outputs the SMART information to the read hard disk determination unit 7. Each SMART function unit 6 displays 61a / 61b, 62a / 62b, 63a / 63b, 64a / 64b, 65a / 65b, 66a / 66b in association with each hard disk.

  Further, the read hard disk determination unit 7 is provided for each of the logical drives 21 to 26 including the paired hard disks 2 and extracts temperature information from the SMART information output from the corresponding SMART function unit 6. Then, the six read hard disk determination units 7 (71 to 76) compare the temperature information of the paired hard disks 2, determine the lower temperature as the read hard disk, and identify the identification ID representing the determined read hard disk The data is output to the logical drive access processing unit 8. The process of determining the read hard disk in the read hard disk determination units 71 to 76 is performed every time SMART information is received from the corresponding two SMART function units 6.

  The logical drive access processing unit 8 (81 to 86) is provided corresponding to each of the logical drives 21 to 26 constituted by the paired hard disks 2, that is, corresponding to each read hard disk determination unit 7 (71 to 76). The logical drive access processing unit 8 (81-86) then sends to each of the corresponding two hard disks 2 if the write processing requested from the opposing server 100 is for the corresponding logical drive 21-26. Write processing is executed for the same information. The logical drive access processing unit 8 (81 to 86), when the read processing requested from the opposite server 100 is for the corresponding logical drives 21 to 26, is an identification ID that is periodically input. Refer to Then, the logical drive access processing unit 8 (81 to 86) performs a read process on the hard disk 2 corresponding to the referenced identification ID, and reads the corresponding information written in the hard disk 2.

  Next, the operation of this embodiment will be described. In the RAID device 1, the RAID controller device 5 executes read processing or write processing on each of the logical drives 21 to 26 based on the read / write processing request from the opposing server 100. At this time, a temperature difference may occur between the two hard disks 2 constituting each of the logical drives 21 to 26. Specifically, when the read processing is executed biased with respect to only one of the paired hard disks 2 or when the peripheral device 101 of the RAID device 1 is in the horizontal direction with respect to the RAID device 1 as shown in FIG. A case may be considered in which one of the cooling airs A that are arranged biased to X and are supplied from the two cooling fans 4 has become hot due to the influence of the peripheral device 101.

  In these cases, in the RAID controller device 5, the read hard disk determination unit 7 determines the hard disk 2 having a relatively low temperature as the read hard disk based on the temperature information included in the SMART information acquired from the SMART function unit 6. Yes. In the RAID controller device 5, when the logical drive access processing unit 8 receives a read processing request from the opposite server 100, two logical drives 21 to 26 are configured based on the determination by the read hard disk determination unit 7. Of the two hard disks 2, the read process is always performed on the hard disk 2 having a low temperature. For this reason, even if there is a temperature difference between the two hard disks 2 constituting each of the logical drives 21 to 26 for some reason, the temperature difference between them can be reduced. As a result, the temperature of each hard disk 2 is smoothed from a long-term viewpoint, and the life of the entire RAID device 1 can be extended.

  In the above description, the temperature information of each hard disk 2 is acquired from the SMART information generated by each hard disk 2, but the present invention is not limited to this. FIG. 3 shows a modification of the present embodiment. As shown in FIG. 3, in the RIAD controller device 120A of the RAID device 120 according to the modified example, the temperature sensors 12 (121a · 121b, 122a · 122b, 123a · 123b, 124a · 124b, 125a · 125b, 126a and 126b). The RAID controller device 120A is provided corresponding to each temperature sensor 12 and receives temperature information detected by the temperature sensor 12 and output temperature information 13 (131a · 131b, 132a · 132b, 133a · 133b, 134a · 134b, 135a · 135b, 136a · 136b). Then, based on the temperature information output from the corresponding two temperature information receiving units 13, the read hard disk determination unit 7 determines the lower one of the two corresponding hard disks 2 as the read hard disk. As described above, even if information other than the SMART information can be obtained, information similar to the temperature of each hard disk 2 can be acquired, and the same effect can be expected.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  The RAID controller apparatus described above has a computer system inside. The operation of each processing unit is stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer reading and executing the program. Here, the computer-readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, and the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

1 RAID device 2, 21a, 21b, 22a, 22b, 23a, 23b, 24a, 24b, 25a, 25b, 26a, 26b Hard disk 5 RIAID controller device 6 SMART function unit (temperature information acquisition unit)
7, 71, 72, 73, 74, 75, 76 Read hard disk determination unit 8, 81, 82, 83, 84, 85, 86 Logical drive access processing unit

Claims (5)

A RAID controller device that combines hard disks that store configuration information of virtual storage means in advance in a pair and operates as one logical virtual storage means,
A temperature information acquisition unit that is provided corresponding to each of the hard disks and acquires temperature information of the hard disks;
Based on the temperature information acquired by the temperature information acquisition unit, a reading hard disk determination unit that determines the lower one of the paired hard disks as a reading hard disk;
Logical drive access processing capable of writing the same data to the paired hard disks and selectively reading the data from the read destination hard disk determined by the read destination hard disk determination unit among the paired hard disks A RAID controller device comprising: a unit. The RAID controller device according to claim 1,
The temperature information acquisition unit is a SMART function unit that acquires SMART information including the temperature information from the hard disk,
The RAID controller device characterized in that the reading hard disk extracts the temperature information from the SMART information acquired by the SMART function unit and compares the temperatures of the paired hard disks. The RAID controller device according to claim 1 or 2,
A RAID device comprising: a plurality of the hard disks that operate under the control of the RAID device. A RAID device processing method that combines hard disks for storing configuration information of virtual storage means in advance in a pair and operates as one logical virtual storage means,
A temperature information acquisition unit provided corresponding to each of the hard disks, acquiring temperature information of the corresponding hard disk;
A reading hard disk determination unit, based on the acquired temperature information, determining the lower one of the paired hard disks as a reading hard disk; and
A logical drive access processing unit includes a step of selectively reading data from the read hard disk determined by the read hard disk determination unit among the paired hard disks. Processing method. A RAID controller device that combines hard disks that store the configuration information of the virtual storage means in advance so as to form a pair, and operates as one logical virtual storage means,
A temperature information acquisition unit which is provided corresponding to each of the hard disks and acquires temperature information of the hard disks;
Based on the temperature information acquired by the temperature information acquisition unit, a reading hard disk determination unit that determines the lower one of the paired hard disks as a reading hard disk,
And a logical drive capable of writing the same data to the paired hard disks and selectively reading data from the read destination hard disk determined by the read destination hard disk determination unit among the paired hard disks A program for operating as an access processing unit.

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