Patent ID: 7116507
Filing Date: 2006-10-03
Classification: G06F,G11B

Abstract:
1. A storage system, comprising: a controller configured for transferring data to a plurality of storage regions; at least one data line being used to relay data transferred from said controller; a plurality of disk drive units coupled to said data line and having a plurality of disk drives which have said storage regions; at least one first AC/DC power supply being inputted AC input and supplying said disk drive units; at least one second AC/DC power supply being inputted AC input and supplying said disk drive units with DC power; at least one DC power supply coupled to both a first power line and a second power line and supplying said disk drive units with DC power which are lower than inputted DC power; at least one power source state detecting unit detecting a state of DC power supplied to said disk drive units, wherein said controller controls spin up starting of said disk drive units based on a result of detecting by said power source state detecting unit, and wherein said controller controls the number of said disk drive units for starting spin up based on the result of detecting by said power source state detecting unit.