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Disk array control device and storage device

a technology of array disks and control devices, applied in computing, electrical equipment casings/cabinets/drawers, instruments, etc., can solve problems such as the possibility of destruction of data structures, which are constructed on array disks, and it is practically difficult to update firmware during the operation of the system

Inactive Publication Date: 2010-04-29
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, if the flag is set to “0” during the operation of the system in which the plural disk drives are array-controlled, the data structure, which is constructed on the array disk, may possibly be destroyed.
Consequently, it is practically difficult to update the firmware during the operation of the system.

Method used

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  • Disk array control device and storage device
  • Disk array control device and storage device
  • Disk array control device and storage device

Examples

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Embodiment Construction

[0023]Various embodiments according to the invention will be described hereinafter with reference to the accompanying drawings. In general, according to one embodiment of the invention, a disk array control device manages a plurality of drives as a single logical drive. The disk array control device comprises a first register configured to store a to-be-accessed drive number which is designated by a host, and a control module. The control module is configured to receive a command from the host, determine whether the received command is a predetermined command which is used for maintenance of each of the drives, and execute, in a case where the received command is the predetermined command, a pass-through process of sending the received command to the drive which is designated by the to-be-accessed drive number in the first register.

[0024]To begin with, referring to FIG. 1, a structure example of a storage device according to an embodiment of the invention is described. The storage d...

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Abstract

According to one embodiment, a disk array control device manages a plurality of drives as a single logical drive. The disk array control device includes a first register configured to store a to-he-accessed drive number which is designated by a host, and a control module. The control module is configured to receive a command from the host, determine whether the received command is a predetermined command which is used for maintenance of each of the drives, and execute, in a case where the received command is the predetermined command, a pass-through process of sending the received command to the drive which is designated by the to-be-accessed drive number in the first register.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2008-278646, filed Oct. 29, 2008, the entire contents of which are incorporated herein by reference.BACKGROUND[0002]1. Field[0003]One embodiment of the present invention relates to a disk array control device which manages a plurality of drives as a single logical drive, and a storage device including the disk array control device.[0004]2. Description of the Related Art[0005]In recent years, in an information processing apparatus such as a server or a personal computer, use is made of a disk array control system such as a redundant array of inexpensive disks (RAID).[0006]The disk array control system is a system which handles a plurality of drives, such as hard disk drives, as a single logical drive. In the disk array control system, data is distributively written in a plurality of drives in units of a data block. Accordingly, the perfor...

Claims

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Application Information

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IPC IPC(8): G06F12/00
CPCG06F3/0605G06F3/0689G06F3/0659
Inventor KURASHIGE, TAKEHIKOYANO, JUNJI
Owner KK TOSHIBA
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