Disk drive data protection using clusters containing error detection sectors

An error detection system that controls a disk drive to provide an indication as to whether the disk drive accessed a correct location, the system comprising:

• a store circuit adapted to store data on the disk drive within clusters of sectors, where a cluster includes multiple input/output (I/O) data sectors and an error detection sector, where the error detection sector contains a value that indicates a physical location on the disk that corresponds to a sector from the cluster;
• and
• a read circuit adapted to read a cluster of data from the disk drive in response to a read request from a host, and to compare a value retrieved within the cluster of data to an expected value to determine whether the disk drive accessed data from a correct physical location on the disk drive.