Abstract: According to one embodiment, a storage device includes an error detector, a check module, and a replacement module. The error detector detects a bit error that occurs in entry data related to conversion to a physical address corresponding to a logical address based on an error detecting code assigned to the entry data. The check module checks, based on data obtained by inverting one bit among all bits of the entry data and on data read out from the physical address indicated by the obtained data, whether or not the obtained data is normal entry data. The replacement module replaces the entry data where the bit error is detected with the checked normal entry data.

Abstract: According to one embodiment, a storage device includes an error detector, a check module, and a replacement module. The error detector detects a bit error that occurs in entry data related to conversion to a physical address corresponding to a logical address based on an error detecting code assigned to the entry data. The check module checks whether data obtained by inverting a predetermined bit contained in the entry data where the bit error is detected is normal entry data. The replacement module replaces the entry data where the bit error is detected with the normal entry data.

Abstract: The disk device includes a disk medium that records data, a non-volatile memory having a first program code region that records a first program code for initial startup, a second program code region that records a second program code, a log information region that records log information, and an error log information record start address that is set in the second program code region; and a processor that operates in accordance with the first and second program codes, collects error log information, and records the collected error log information by overwriting data from the error log information record start address of the non-volatile memory, if the collected error log information cannot be recorded on the disk medium and cannot be expressed with a recordable size in the log information region of the non-volatile memory.