Disk subsystems and their integrated system
First Claim
1. A plurality of storage systems comprising:
- a first storage system including a first controller controlling a first write request received, and a first storage storing data under control by said first controller;
a second storage system including a second controller controlling a second write request received, and a second storage storing data under control by said second controller;
a third storage system connected to said first storage system and said second storage system, said third storage system comprises;
a third controller controlling data received from said first storage system synchronously and controlling data received from said second storage system synchronously, and a third storage storing data under control by said third controller; and
a fourth storage system connected to said third storage system, said fourth storage system comprises;
a fourth controller controlling data received from said third storage system asynchronously, and a fourth storage storing data under control by said fourth controller.
0 Assignments
0 Petitions
Accused Products
Abstract
An asynchronous remote copy system which can ensure the data renewal order and data integrity of the disk subsystems. The system provides for data mirroring by a main center having a gateway and a remote center having a gateway, and storage systems in each center connected to the corresponding gateway. Data is mirrored through synchronous type remote copy between volumes of the storage systems of each center. The gateway of the main center sends the renewal data to the gateway of the remote center in accordance with the order of renewal of volumes, to make the gateway of the remote center reflect the renewal data upon the volumes thereof through asynchronous type remote copy.
-
Citations
19 Claims
-
1. A plurality of storage systems comprising:
-
a first storage system including a first controller controlling a first write request received, and a first storage storing data under control by said first controller;
a second storage system including a second controller controlling a second write request received, and a second storage storing data under control by said second controller;
a third storage system connected to said first storage system and said second storage system, said third storage system comprises;
a third controller controlling data received from said first storage system synchronously and controlling data received from said second storage system synchronously, and a third storage storing data under control by said third controller; and
a fourth storage system connected to said third storage system, said fourth storage system comprises;
a fourth controller controlling data received from said third storage system asynchronously, and a fourth storage storing data under control by said fourth controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification