Patent ID: 7913029
Filing Date: 2011-03-22
Classification: G06F,G11B

Abstract:
1. An information recording apparatus comprising: a disc-shaped recording medium; a cache memory configured to be a cache for the disc-shaped recording medium; a non-volatile memory with a speed of write and readout of information slower than the cache memory, and configured to be a cache for the disc-shaped recording medium; and a control unit configured to control mutual transfer of information between each of the disc-shaped recording medium, the cache memory, and the non-volatile memory and the outside, control mutual transfer of information between the disc-shaped recording medium, the cache memory, and the non-volatile memory, and control to set a substituting region corresponding to a defect region generated in the disc-shaped recording medium in the non-volatile memory, wherein, in a case when an address of the disc-shaped recording medium from which information is read out is designated by a host, and a command that requests write of the information read out from the disc-shaped recording medium in a region of the non-volatile memory allocated corresponding to the address is input, a situation where readout with respect to the region on the disc-shaped recording medium shown by the address designated by the command does not properly terminate within the predetermined number of readouts and the readout is completed by requiring the number of times of retrying over the predetermined number of times of retrying, and the region on the disc-shaped recording medium is newly registered as the defect region, and the control unit is configured to allocate a substituting region corresponding to a defect region on the disc-shaped recording medium to the non-volatile memory, and also add attribute information showing that the substituting region cannot be eliminated from the non-volatile memory and attribute information of pinned on a management table that manages the non-volatile memory.