US5764430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk drive having optimized spindle speed for environment
Assignee: HGST Netherlands BV
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Filing: 1996-04-01
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Granted: 1998-06-09
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Expires: 2016-04-01
Abstract
Abstract A disk storage device in which two or more discrete disk velocities are used is disclosed. The disk velocity is selected using operating environmental conditions. Various types of sensors may be used to detect the environmental conditions or the environmental conditions may be input by a user. The allocation of track locations on a disk into zones reduces the number of zone bit frequencies the storage device must handle when multiple frequency zones are used in connection with the various spindle speeds.
Inventors
- 👤 Hal Hjalmar Ottesen
- 👤 Gordon J. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:00
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/26; G11B19/02; G11B19/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A memory storage device, comprising: a storage medium for storing data; a motor connected to the storage medium to selectively rotate the storage medium at a plurality of discrete operational velocities; a transducer mounted to access the storage medium at each of the plurality of discrete velocities; a control unit, coupled to receive an environment signal indicative of an environment in which the memory storage device is operating, the control unit providing a control signal to the motor indicative of one of the plurality of discrete operational velocities based on the environment signal; and a data channel coupled to the transducer, the data channel configured to read and write data at a number of different frequencies, each of the different frequencies corresponding to a respective one of the discrete operational velocities.
Claim 2
Dependent Claim
131 words
A memory storage device, comprising: a storage medium for storing data; a motor connected to the storage medium to selectively rotate the storage medium at a plurality of discrete operational velocities; a transducer mounted to access the storage medium at each of the plurality of discrete velocities; a control unit, coupled to receive an environment signal indicative of an environment in which the memory storage device is operating, the control unit providing a control signal to the motor indicative of one of the plurality of discrete operational velocities based on the environment signal; and a data channel coupled to the transducer, the data channel configured to read and write data at a number of different frequencies, each of the different frequencies corresponding to a respective one of the discrete operational velocities.
Claim 3
Dependent Claim
69 words
A device as recited in claim 1, further comprising an accelerometer detecting an amount of shock or vibration in which the memory storage device is operating, wherein an output of the accelerometer is used to produce the environment signal and the control unit changes a rotational velocity of the storage medium to one of the discrete operational velocities when the amount of shock or vibration reaches a predefined threshold.
Claim 4
Dependent Claim
63 words
A device as recited in claim 1, further comprising a temperature sensor detecting a temperature in which the memory storage device is operating, wherein an output of the temperature sensor is used to produce the environment signal and the control unit changes a rotational velocity of the storage medium to one of the discrete operational velocities when the temperature reaches a predefined threshold.
Claim 5
Dependent Claim
65 words
A device as recited in claim 1, further comprising a pressure sensor detecting an atmospheric pressure in which the memory storage device is operating, wherein an output of the pressure sensor is used to produce the environment signal and the control unit changes a rotational velocity of the storage medium to one of the discrete operational velocities when the atmospheric pressure reaches a predefined threshold.
Claim 6
Dependent Claim
27 words
A device as recited in claim 1, wherein the environment signal represents user input data indicative of the environment in which the memory storage device is operating.
Claim 7
Dependent Claim
21 words
A device as recited in claim 1, wherein the environment signal represents a spacing between the storage medium and the transducer.
Claim 8
Dependent Claim
52 words
A device as recited in claim 6, wherein the control unit selects a new discrete velocity from the plurality of discrete operational velocities when the spacing is below a predefined threshold, the new discrete velocity corresponding to a velocity at which the spacing between the storage medium and the transducer is increased.
Claim 9
Dependent Claim
59 words
A device as recited in claim 1, wherein the storage medium is banded into multiple zones each having a uniquely assigned zone bit frequency for reading data from the storage medium at a given discrete velocity, the zones being defined by radii determined according to a geometric progression which maintains a substantially constant ratio of radii between adjacent zones.
References Cited (Backward Citations)
JPS60171672A
Cited
US4685303A
Cited
US4750059A
Cited
US4864428A
Cited
JPS63273287A
Cited
US5440474A
Cited
US5210660A
Cited
US5285327A
Cited
US5235473A
Cited
US5227929A
Cited
US5566077A
Cited
US5412519A
Cited
US5589996A
Cited
US5623597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-08 | 2001-12-08 | 2002-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-08 | 2005-12-08 | 2006-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-08 | 2009-12-08 | 2010-06-09 | $7700.00 | Window Closed / Lapsed |