Patent ID: 11860719
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A front-end interface card in a storage system, wherein the front-end interface card comprises:
a first interface configured to communicate with a host;
a second interface configured to communicate with a plurality of storage controllers of the storage system; and
a processor communicatively coupled to the first interface and the second interface and configured to:
detect a status of a first storage controller, wherein the first storage controller is in the storage controllers and configured to process an access request of the host;
select a second storage controller from the storage controllers for the host to process the access request when the first storage controller is in an abnormal state due to being offline, a power failure, an upgrade to the first storage controller, or unresponsiveness;
send, to the host when the first storage controller is in the abnormal state, an access request error message reporting an error status of the access request; and
again receive, from the host and in response to the access request error message, the access request,
wherein the second storage controller is in the storage controllers and is different distinct from the first storage controller.