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:
Nov. 12, 2002
Filed:
Sep. 28, 1999
Naoki Hino, Hiratsuka, JP;
Toshiya Nakano, Chigasaki, JP;
Tetsuya Kishimoto, Odawara, JP;
Hidehiko Iwasaki, Hiratsuka, JP;
Kenji Muraoka, Odawara, JP;
Kenichi Takamoto, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
For providing a storage control unit to be connected to a fiber channel, in which a new storage control unit is added onto the fiber channel network during on-line operation and succeeds control information of a logical unit from the storage control unit which has been existing before, so as to be in charge of a process request issued to that logical unit from a host computer thereafter, wherein a control memory being able to memorize the control information is provided in each of the storage control units and , which information is necessary when succeeding or taking over the logical unit and is represented by such as construction information of a magnetic disk drive within a disk drive unit and construction information of the logical unit, so on. The contents of the control memory within the storage control unit is copied into the control memory of the storage control unit when the new storage control unit is added onto the fiber channel network.