Storage Controller Cache Synchronization Method and Apparatus

摘要

A storage controller is provided. The storage controller includes a memory storing an indication of a current owner, a previous owner, and a preferred owner for each of one or more logical volumes. The storage controller is configured to write protect the logical volumes where the current owner and the preferred owner is the storage controller and the previous owner of the logical volumes was a different storage controller. For the logical volumes where the storage controller is the preferred but not the current owner, the storage controller is set as the current and preferred owner of the logical volumes that the different storage controller was the current but not the preferred owner for, storage controller is set as the previous owner of the logical volumes that the storage controller is the current and preferred owner of, and allowing read and write access to the one or more logical volumes.

主权项

1. A storage controller comprising:
a memory storing an indication of a current owner, a previous owner, and a preferred owner for each of one or more logical volumes, the storage controller configured to:
write protect the logical volumes where the current owner and the preferred owner is the storage controller and the previous owner of the logical volumes was a different storage controller;for the logical volumes where the storage controller is the preferred but not the current owner:
setting the storage controller as the current and preferred owner of the logical volumes that the different storage controller was the current but not the preferred owner for, setting the storage controller as the previous owner of the logical volumes that the storage controller is the current and preferred owner of, and allowing read and write access to the one or more logical volumes.