COMMUNICATION OF CONDITIONS AT A PRIMARY STORAGE CONTROLLER TO A HOST

摘要

A primary storage controller is maintained in a copy relationship with a secondary storage controller, wherein the primary and secondary storage controllers are coupled to a host that is configurable to use the secondary storage controller instead of the primary storage controller. The primary storage controller determines occurrence of at least one condition in the primary storage controller, wherein the at least one condition occurs prior to a failure of the host to perform an Input/Output (I/O) operation with respect to at least one storage volume of the primary storage controller. The primary storage controller communicates the occurrence of the at least one condition to the host, wherein in response to the communicating the host is configured to determine whether to use the secondary storage controller instead of the primary storage controller based on the occurrence of the at least one condition.

主权项

1. A method, comprising:
receiving, by a host from a primary storage controller coupled to the host, an indication of an occurrence of at least one condition that indicates a possibility of potential error at a future point in time in the primary storage controller; and determining, by the host, whether it is more effective to use a secondary storage controller instead of the primary storage controller in comparison to waiting for the primary storage controller to complete error recovery subsequent to the occurrence of the at least one condition.