Data management method for magnetic disk device and magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorMasaya SUZUKI
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Abstract
According to one embodiment, a magnetic disk device including a magnetic disk, measures an error rate of the magnetic disk, sets an area to be affected by sputtering claws generated during manufacturing of the magnetic disk based on the measured error rate, and writes reference data used for measuring the error rate to the set area. Then, the magnetic disk device manages the data written to the magnetic disk based on the error rate when reading the reference data written to the set area.
Claims7
A data management method for a magnetic disk device including a magnetic disk, the method comprising:
- measuring an error rate of the magnetic disk;
- setting an area affected by a sputtering claw generated during manufacturing of the magnetic disk, based on the measured error rate;
- writing reference data to be used for the measuring of the error rate to the set area;
- and
- managing data written to the magnetic disk based on the error rate when reading the reference data written to the set area.
A magnetic disk device comprising:
- a magnetic disk including an area affected by sputtering claws created during manufacturing of the magnetic disk, to which reference data used for measuring an error rate is written, based on the error rate measured from the magnetic disk;
- and
- a control portion which manages the data written to the magnetic disk based on the error rate when reading the written reference data.
Dependencies are inferred from the claim text.