Propagation by a controller of reservation made by a host...

Details Propagation by a controller of reservation made by a host... Propagation by a controller of reservation made by a host...

2011-03-08

2011-03-08

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S005110, C714S006130, C714S042000

Reexamination Certificate

active

07904743

ABSTRACT:
Provided are a method, system, and article of manufacture wherein a primary controller receives a request from a primary host to set reservations on a primary storage and a secondary storage, wherein the primary host, the primary controller and the primary storage are at a first site, and wherein a secondary host, a secondary controller, and the secondary storage are at a second site. The primary controller sets a first reservation on the secondary storage via a storage area network coupling the secondary storage to the primary controller, wherein the setting of the first reservation causes the secondary storage to be read only for a secondary host. The primary controller sets a second reservation on the primary storage, wherein the setting of the second reservation allows the primary host to perform read and write operations on the primary storage.

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