Patent ID: 8555007

Claim:
A storage system comprising a plurality of storing units and a data processing unit configured to store data into the plurality of storing units, wherein: the data processing unit includes: a storage destination setting unit configured to set one of the plurality of storing unit as a journal storing unit configured to store a journal showing a data processing status of the storage system, and set the plurality of storing units other than the storing unit, on which the journal storing unit is set, as fragment storing units configured to distributedly store a plurality of fragment data forming storage target data, respectively; and a distribution storage controlling unit configured to store the journal into the storing unit set as the journal storing unit by the storage destination setting unit, and distribute and store the plurality of fragment data into the plurality of storing units set as the fragment storing units, respectively, wherein the storage destination setting unit is configured to set the storing unit, on which the journal storing unit is set, so as to be changed into the other storing units subsequently based on change of a value of an available capacity of the storing unit set as the journal storing unit and values of available capacities of the other storing units.