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. 05, 2005
Filed:
Feb. 20, 2001
Katsuyoshi Suzuki, Odawara, JP;
Kenichi Takamoto, Odawara, JP;
Kenji Muraoka, Odawara, JP;
Hidehiko Iwasaki, Hiratsuka, JP;
Katsuyoshi Suzuki, Odawara, JP;
Kenichi Takamoto, Odawara, JP;
Kenji Muraoka, Odawara, JP;
Hidehiko Iwasaki, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
RAID information and physical position information of hard disk units are managed by a disk controller in a mapped fashion. When the physical position of the hard disk units is changed, the information mapping is retried. Further, the positional information of the hard disk units accommodated in a disk array system under the administration of the disk controller, is calculated so as to form n-dimensional coordinate system information, and the resulting information is stored in each of the hard disk units. When the hard disk units are inserted into the disk array system, the n-dimensional coordinate system information is read from each hard disk unit. If it is detected that there is difference from the current coordinate system information, then information before removal and that after the insertion are compared with each other and a data link is reconstructed.