Magnetic disk device and write capable of detecting data errors and performing read-write verification thereof
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorTomokazu Okubo
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Abstract
A magnetic disk device includes a disk, a head configured to write data on the disk based on a write current, and a controller configured to determine whether a write error occurs when data is written on the disk, based on a change in a heating value of the head, and upon determining that the write error occurs, read the data written on the disk.
Claims11
A magnetic disk device comprising:
- a disk;
- a head configured to write data on the disk based on a write current, wherein the head includes a write coil to which the write current is supplied, and a heating value of the head changes in accordance with a resistance value of the write coil;
- and
- a controller configured to:
- determine that a write error occurs when data is written on the disk, upon determining that the resistance value of the write coil is less than a threshold value, and
- upon determining that the write error occurs, read the data written on the disk.
A magnetic disk device comprising:
- a disk;
- a head including a write coil to which a write current is supplied and a head disk interference sensor that includes a resistance element, the head being configured to write data on the disk based on the write current;
- an integrated circuit configured to output the write current of which amplitude is modulated based on a clock signal and write data, to the head, and including a measurement unit that measures a resistance value of the resistance element;
- and
- a controller configured to determine that a write error occurs and read the data written on the disk, when the resistance value is less than the threshold value.
A method of performing a write in a magnetic disk device having a disk and a head configured to write data on the disk based on a write current, said method comprising:
- measuring a resistance value of a write coil in the head to which the write current is supplied, the resistance value of the write coil affecting a heating value of the head;
- determining that a write error occurs when data is written on the disk, upon the resistance value of the write coil being less than a threshold value;
- and
- upon determining that the write error occurs, reading the data written on the disk.
Dependencies are inferred from the claim text.