Abnormality detecting device and method of detecting an abnormality in a head of hard disk

摘要

An input/output device includes a creating unit that creates a first data pattern that is different from a second data pattern created last time, a writing unit that writes the first data pattern as a written data pattern, and a judging unit that reads out a data pattern written in the input/output device as a read data pattern and judges whether the written data pattern and the read data pattern coincide with each other.