US 10,229,707 B2 · Magnetic disk recording device having different time interval between first and second pre-heating periods

Abstract

A disk device includes first and second recording surfaces, a first head for the first recording surface, including a first heater which generates heat via a first electric power, a second head for the second recording surface, including a second heater which generates heat via a second electric power, and a control circuit configured to execute a first preheating operation in which the first electric power is supplied to the first heater for a first time interval prior to starting a first writing process to write data on the first recording surface by the first head, and to execute a second preheating operation in which the second electric power is supplied to the second heater for a second time interval prior to starting a second writing process to write data on the second recording surface by the second head. The first time interval is different from the second time interval.

Claims20

Dependent claims

A disk device comprising:

a first recording surface and a second recording surface, each disposed on any one of one or more disks;
a first head for the first recording surface, the first head including a first heater which generates heat via a first electric power;
a second head for the second recording surface, the second heater including a second heater which generates heat via a second electric power;
and
a control circuit configured to execute a first preheating operation in which the first electric power is supplied to the first heater for a first time interval prior to starting a first writing process in which data are written on the first recording surface by the first head, and to execute a second preheating operation in which the second electric power is supplied to the second heater for a second time interval prior to starting a second writing process in which data are written on the second recording surface by the second head,
wherein the first time interval is different from the second time interval.

3 more elements

A control method of a disk device,

the disk device including
a first recording surface and a second recording surface disposed on any one of at least one or more disks,
a first head that corresponds to the first recording surface and includes a first heater which generates heat by first electric power, and
a second head that corresponds to the second recording surface and includes a second heater which generates heat by second electric power,
the control method comprising:
executing a first preheating operation in which the first electric power is supplied to the first heater for a first time interval prior to starting a first writing process in which data are written on the first recording surface by the first head;
and
executing a second preheating operation in which the second electric power is supplied to the second heater for a second time interval prior to starting a second writing process in which data are written on the second recording surface by the second head,
wherein the first time interval is different from the second time interval.

6 more elements

Dependencies are inferred from the claim text.

Magnetic disk recording device having different time interval between first and second pre-heating periods

Life of this patent

Magnetic disk recording device having different time interval between first and second pre-heating periods

Life of this patent

Abstract

Claims20