Patent ID: 8031422
Filing Date: 2011-10-04
Classification: G11B

Abstract:
1. A disk controller for a hard disk drive, the hard disk drive including a physical medium, the disk controller comprising: a memory configured to store data to be written onto the physical medium of the hard disk drive; and a disk formatter configured to operate in a non-test mode and a test mode, the disk formatter including wherein, in response to the disk formatter operating in the non-test mode, the disk formatter is configured to control a first sequence of operations for writing the data stored in the memory onto the physical medium of the hard disk drive, and wherein, in response to the disk formatter operating in the test mode, the accumulator is configured to accumulate the test data based on the second sequence of operations, wherein the test data accumulated in the accumulator based on the second sequence of operations is usable to determine proper operation of the first sequence of operations.