Disk array control device, storage system, and method of controlling disk array

A technology for controlling equipment and storage systems, applied to instruments, input/output to record carriers, error detection/correction, etc., capable of solving problems such as illegal use of data

Inactive Publication Date: 2006-09-13
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a RAID1 system with two disk drives, to which the same data is written, there is a concern that one of the disk drives may detach from the system and the data stored in the detached disk drive may be Illegally used in another device

Method used

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  • Disk array control device, storage system, and method of controlling disk array
  • Disk array control device, storage system, and method of controlling disk array
  • Disk array control device, storage system, and method of controlling disk array

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Embodiment Construction

[0018] Embodiments of the present invention will be described below with reference to the drawings.

[0019] FIG. 1 shows the configuration of a storage system 102 according to an embodiment of the present invention. The storage system 102 stores data processed by a host device 101 such as a personal computer, a television, and an AV device. The storage system 102 is implemented as a Redundant Array of Inexpensive Disks (RAID) system in which data items and redundant data items for recovering errors of the data items are dispersed and stored in the disk array 100 . The storage system 102 can also be implemented as a storage device built into the host device 101 or as a storage device externally connected to the host device 101 .

[0020] The storage system 102 is detachably connected to a connection part (slot) 103 provided for the host device 101 . Referring to FIG. 1 , a storage system 102 includes a slot 104 , a RAID controller 105 , slots 106 to 108 , and a plurality of ...

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PUM

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Abstract

A disk array control device controls a disk array in accordance with a disk access request from a host device. The disk array control device includes a cipher unit which ciphers write data transmitted from the host device, using a key unique to the disk array control device, a write unit which writes the ciphered write data and redundant data for recovering a fault of the ciphered write data to the disk array, a read unit which reads ciphered data out of the disk array in accordance with a read request from the host device, a decipher unit which deciphers the ciphered data that is read out of the disk array, using the key, and a return unit which returns the deciphered data to the host device.

Description

technical field [0001] The present invention relates to a disk array control device for storing data in a disk array such as a redundant array of inexpensive disks (RAID), a storage system for storing data in the disk array, and a A method for controlling the disk array. Background technique [0002] Information processing apparatuses such as server computers and personal computers have recently used redundant disk arrays such as RAID to improve disk access speed and protect data stored therein. [0003] In RAID, some redundancy levels (RAID levels) such as RAID1, RAID4, and RAID5 are defined. In the RAID system, data items and redundant data items for recovering errors of the data items are dispersed and stored in a plurality of disk drives. Thus, the RAID system achieves sufficient fault tolerance. The RAID system has a reconstruction function of restoring data content stored in a failed disk drive using data stored in another disk drive. [0004] Most personal compute...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F21/80G06F11/1076
Inventor 觉井真吾
Owner KK TOSHIBA
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