Patent ID: 9619170
Date: 2017-04-11
CPC Classifications: G06F,G11C

Claim:
1. An information processing system comprising: a first storage unit including a readable and writable first memory; a second storage unit including a readable and writable second memory; an information processing device connectable to the first storage unit and the second storage unit; and a data migration log area, wherein the information processing device includes a control unit configured to execute: first processing for determining a storage status of the first storage unit based on reliability information acquired from the first storage unit; second processing for, when the storage status of the first storage unit is recognized as a protected state by the first processing, executing write on only the second storage unit of the first and second storage units, when a read target address is recorded in the data migration log area, executing read data from the second storage unit and, when the read target address is not recorded in the data migration log area, executing read data from the first storage unit; third processing for recording an address of data written in the second storage unit in the data migration log area according to the write by the second processing; and fourth processing for, when the storage status of the first storage unit is not recognized as the protected state by the first processing, executing read data from the first storage unit without reading from the data migration log area.