The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1998
Filed:
Aug. 13, 1997
Shiro Takagi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawsaki, JP;
Abstract
There is provided a disk array apparatus designed to realize high-speed recovery processing in occurrence of an error while preventing a reduction in total storage capacity due to the use of parity disks. A disk with a high access frequency is set in a group constituted by a small number of disks, whereas a disk with a low access frequency is set in a group constituted by a large number of disks. In a group constituted by a small number of disks, since the number of disks used for recovery is small, the disk access frequency in recovery processing becomes low, and high-speed recovery processing can be realized. In a group constituted by a large number of disks, since the ratio of the parity disk capacity to the total capacity is low, a reduction in disk capacity is small.