Back to results
US 7,023,638 B2Granted
Data storage device, data read correction mechanism, and data read control method
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsNobuya Matsubara, Fuminori Sai, Kohji Takasaki, Noboru Yoshida
Life of this patent
Estimating the term…
Abstract
A correction mechanism for use in a data storage system that allows data to be read even if the recorded data has been phase shifted.
Claims13
A data storage device based on a magnetic recording medium, comprising:
- a magnetic head for reading magnetic information recorded on said magnetic recording medium and acquiring a read signal;
- a data read means for converting said read signal read by said magnetic head into desired data in synchronism with a read clock signal;
- and
- a read clock control means for controlling the phase of said read clock signal in accordance with the phase of said read signal read by said magnetic head to correct the phase of said read clock signal if a phase shift between said read clock signal and said read signal exceeds a predefined value;
- wherein data is not successfully read by the data read means with the phase shift exceeding the predefined value.
2 more elements
A data read control method for reading data written on a predefined recording medium, comprising:
- acquiring a read signal of information recorded on said recording medium;
- converting said read signal into desired data in synchronism with a read clock signal, wherein data is not successfully read with a phase shift between said read clock signal and said read signal exceeding a predefined value;
- and
- making corrections, if data is not successfully read due to said phase difference between said read clock signal and said read signal with said phase difference exceeding said predefined value, to adjust the phase of the read clock signal for the phase of the read signal.
1 more element
Dependencies are inferred from the claim text.