Storage system and storage control apparatus

A storage control apparatus comprising:

• an interface for connecting a host, a plurality of first expanders, a first controller, a plurality of second expanders, the host, the plurality of first expanders for connecting a plurality of storage units, each of the plurality of first expanders being connected cascade each other, the plurality of second expanders for connecting the plurality of storage units, each of the plurality of second expanders being connected cascade each other, a first controller connected one of the plurality of first expanders, one of the plurality of second expanders and a host;
• a detector for detecting a failure of at least one of the first controller, the plurality of first expanders and the plurality of second expanders;
• a controller for 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;
• and
• a determining module for determining one of the first boot sequence and the second boot sequence on the basis of a place where a failure has occurred in a recovery process.