Magnetic disk device
AssigneeHitachi, Ltd.
InventorsMikio Tokuyama, Ryoichi Ichikawa, Shigeo Nakamura, Toshihiko Shimizu, Hiromitsu Masuda, Hiromitsu Tokisue
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Abstract
A magnetic disk device having a head IC on a magnetic head supporting mechanism. In order to secure the reliability by controlling the IC temperature below a predetermined level, the difference in the IC cooling ability varying with the radial position on the disk is quantified, so that power (signal) sufficient to maintain a constant temperature according to the IC temperature is supplied to the IC. Since the cooling ability at a given radial position of the IC is not exceeded by the power consumption, the IC temperature can be maintained below a predetermined level.
Claims14
A magnetic disk device comprising a magnetic disk for recording information, a rotary mechanism for rotating said magnetic disk, a magnetic head unit for recording information on the rotating magnetic disk, a slider having mounted thereon said magnetic head unit and flying over said rotating magnetic disk, a magnetic head supporting mechanism for supporting said slider, and a positioning mechanism for setting said magnetic head unit at a predetermined radial position,
- wherein said magnetic head supporting mechanism has mounted thereon an IC for amplifying the information write/read signal of said magnetic head unit, a control circuit is connected to said IC, and a power consumption of said IC is controlled according to the radial position of said IC on said magnetic disk by said control circuit.
A magnetic disk device comprising a magnetic disk for recording information, a rotary mechanism for rotating said magnetic disk, a magnetic head unit for recording the information on the rotating magnetic disk, a slider having mounted thereon said magnetic head unit and flying over said rotating magnetic disk, a magnetic head supporting mechanism for supporting said slider, and a positioning mechanism for setting said magnetic head unit at a predetermined radial position,
- wherein said magnetic head supporting mechanism has mounted thereon at least an IC for amplifying the information write/read signal for said magnetic head unit, a control circuit is connected to said IC, and said control circuit operates in such a manner that the time during which said magnetic head unit is located on an outer peripheral position is longer than the continuous write time with said magnetic head located on an inner peripheral position.
A magnetic disk device comprising a magnetic disk for recording information, a rotary mechanism for rotating said magnetic disk, a magnetic head unit for recording the information on the rotating magnetic disk, a slider having mounted thereon said magnetic head unit and flying over said rotating magnetic disk, a magnetic head supporting mechanism for supporting said slider, and a positioning mechanism for setting said magnetic head unit at a predetermined radial position,
- wherein at least two ICs for writing/reading information through the magnetic head unit are mounted on said magnetic head supporting mechanism, a control circuit is connected to said at least two ICs, and in the case where the continuous write time for one of said ICs is a predetermined time or longer or in the case where the internal temperature of one of said ICs increases to a predetermined level or higher, the continuous write operation is performed with the other IC.
A magnetic head supporting mechanism comprising a magnetic head unit for recording information, a slider having said magnetic head unit mounted thereon and flying over a rotating magnetic disk, and a mechanism for supporting said slider,
- wherein at least two ICs for writing/reading information through the magnetic head unit are mounted on said magnetic head supporting mechanism, a control circuit is connected to said at least two ICs, and in the case where the continuous write time for one of said ICs is a predetermined time or longer or in the case where the internal temperature of one of said ICs increases to a predetermined level or highr, the continuous write operation is performed with the other IC.
A magnetic disk device comprising a magnetic disk for recording information, a rotary mechanism for rotating said magnetic disk, a magnetic head unit for recording the information on the rotating magnetic disk, a slider having mounted thereon said magnetic head unit and flying over said rotating magnetic disk, a magnetic head supporting mechanism for supporting said slider, and a positioning mechanism for setting said magnetic head unit at a predetermined radial position,
- wherein an IC for writing/reading information through said magnetic head unit is mounted on said magnetic head supporting mechanism, a sensor is provided for measuring the temperature of said IC, and a control circuit is connected to said IC, and
- wherein in the case where the temperature of said IC detected by said sensor increases to a predetermined level or higher, the write/read operation of said magnetic head unit is suspended by said control circuit.
A magnetic head supporting mechanism comprising a magnetic head unit for recording/reproducing information, a slider having mounted thereon said magnetic head unit and adapted to fly over a magnetic disk and a mechanism for supporting said slider,
- wherein an IC for writing/reading information through said magnetic head is mounted on said magnetic head supporting mechanism, a sensor is provided for measuring the temperature of said IC, and a control circuit is connected to said IC, and
- wherein in the case where the temperature of said IC detected by said sensor increases to a predetermined level or higher, the write/read operation of said magnetic head unit is suspended by said control circuit.
Dependencies are inferred from the claim text.