Patent ID: 8307244
Filing Date: 2012-11-06
Classification: G06F

Abstract:
1. A storage system comprising: a plurality of first expanders to connect a plurality of storage units, each of the plurality of first expanders being connected cascade each other; a plurality of second expanders to connect the plurality of storage units, each of the plurality of second expanders being connected cascade each other; a first controller connected with one of the plurality of first expanders, one of the plurality of second expanders and a host; a second controller connected with the one of the plurality of second expanders, the one of the plurality of first expanders and the host, the second controller detecting a failure of at least one of the first controller, the plurality of first expanders and the plurality of second expanders, the second controller selectively controlling a first boot sequence which boots the first controller after the plurality of first expanders have been booted and a second boot sequence which boots the first controller before the plurality of first expanders have been booted, determining one of the first boot sequence and the second boot sequence based on a place where a failure has occurred in a recovery process.