Storage subsystem with management site changing function
AssigneeHitachi, Ltd.
InventorsKiyohiro Obara, Yoshifumi Takamoto
Life of this patent
Estimating the term…
Abstract
A storage subsystem which includes a plurality of disk controllers, a plurality of disk drives connected via a network to the plurality of disk controllers, and a path controller connected to the plurality of disk controllers. The path controller changes a management site which manages a volume in each disk drive managed by each disk controller, from one disk controller to another. The path controller has a correspondence table which stores a correspondence between a volume number of a volume in each disk drive and identification information of the disk controller which manages a volume corresponding to the volume number.
Claims1
A storage subsystem comprising:
- a plurality of disk controllers including first and second disk controllers;
- a plurality of disk drives,
- wherein said first disk controller manages a first portion of said plurality of disk drives and said second disk controller manages a second portion of said plurality of disk drives;
- an internal network or switch interconnecting said plurality of disk controllers and said plurality of disk drives;
- management site changing means, coupled to said plurality of disk controllers, for changing a management site of each disk controller so as to change a ratio of said first portion and said second portion;
- and
- access path changing means for changing access paths between a host computer coupled to said plurality of disk controllers and each of said plurality of disk controllers.
Dependencies are inferred from the claim text.