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:
Apr. 25, 2000
Filed:
Oct. 29, 1997
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A plurality of disk array systems are realized in a single disk array apparatus, and double protection of disk arrays is achieved, whereby reliability is enhanced. Row-directional hard disk drives (HDD) connected to hard disk (HD) controllers constitute RAID4 groups. Column-directional HDDs constitute RAID3 groups. A disk region of each HDD is divided into a RAID3&4 region for storing large-volume data which is used repeatedly for a long time period, a RAID3 region for storing large-volume data which is used only for a predetermined time period, and a RAID4 region for storing small-volume data. The RAID3&4 region is protected by RAID3 and RAID4, the RAID3 region is protected by RAID3, and the RAID4 region is protected by RAID4.