Ensuring Rate Of Spin-Up/Spin-Down Cycles For Spindle Motor In A Hard Disk Drive Does Not Exceed Rate Spindle Motor Is Designed To Handle

• US 20060274445A1
• Filed: 06/13/2006
• Published: 12/07/2006
• Est. Priority Date: 06/03/2005
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Jeffrey R. Hobbet, Joaquin F. Pacheco, Steve J. Livaccari
• Inventors: Hobbet, Jeffrey R., Pacheco, Joaquin F., Livaccari, Steve J.
• Granted Patent: US 7,283,319 B2
• Time in Patent Office: Days
• US Class Current: 360/75
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 19/06 by counting or timing of machine operations
• CPC Class Codes: G11B 19/20 Driving; Starting; Stopping; Control thereof

Abstract

A method, computer program product and hard disk drive for restricting a rate of spin-up/spin-down cycles for a spindle motor in a hard disk drive. The firmware in the hard disk drive determines a maximum rate of spin-up/spin-down cycles the spindle motor is designed to handle over a designated period of time based on the number of spin-up/spin-down cycles the spindle motor is designed to handle over its expected lifetime. The firmware disables the automatic standby mode of operation if a calculated rate of spin-up/spin-down cycles during the designated period of time is greater than the maximum rate of spin-up/spin-down cycles the spindle motor is designed to handle over the designated period of time. By disabling the automatic standby mode of operation, the rate of spin-up/spin-down cycles will be reduced as the spindle motor will not incur a spin-up/spin-down cycle until the automatic standby mode of operation is enabled.

Claims

1-27. -27. (canceled)

28. A method for restricting a rate of load/unload cycles for an actuator in a hard disk drive comprising the steps of:

determining a number of load/unload cycles said actuator is designed to handle over its expected lifetime;

determining a maximum rate of load/unload cycles said actuator is designed to handle over a designated period of time using said number of load/unload cycles said actuator is designed to handle over its expected lifetime; and

calculating a rate of load/unload cycles while said hard disk drive is activated during said period of time;

wherein an low power idle state of operation is disabled if said rate of load/unload cycles while said hard disk drive is activated during said period of time is greater than said maximum rate of load/unload cycles said actuator is designed to handle over said designated period of time.

29. The method as recited in claim 28 further comprising the steps of:

monitoring an amount of time said hard disk drive is activated over said designated period of time; and

monitoring a number of load/unload cycles over said designated period of time.

30. The method as recited in claim 29, wherein said rate of load/unload cycles while said hard disk drive is activated during said period of time is calculated using said number of load/unload cycles over said designated period of time and said amount of time said hard disk drive is activated over said designated period of time.

31. A computer program product embodied in a machine readable medium for restricting a rate of load/unload cycles for an actuator in a hard disk drive comprising the programming steps of:

determining a number of load/unload cycles said actuator is designed to handle over its expected lifetime;

determining a maximum rate of load/unload cycles said actuator is designed to handle over a designated period of time using said number of load/unload cycles said actuator is designed to handle over its expected lifetime; and

calculating a rate of load/unload cycles while said hard disk drive is activated during said period of time;

wherein an low power idle state of operation is disabled if said rate of load/unload cycles while said hard disk drive is activated during said period of time is greater than said maximum rate of load/unload cycles said actuator is designed to handle over said designated period of time.

32. The computer program product as recited in claim 31 further comprising the programming steps of:

monitoring an amount of time said hard disk drive is activated over said designated period of time; and

monitoring a number of load/unload cycles over said designated period of time.

33. The computer program product as recited in claim 32, wherein said rate of load/unload cycles while said hard disk drive is activated during said period of time is calculated using said number of load/unload cycles over said designated period of time and said amount of time said hard disk drive is activated over said designated period of time.

34. A hard disk drive comprising:

a spindle;

a spindle motor attached to said spindle for rotatably turning said spindle along an axis of said spindle;

one or more disk storage media disposed coaxially along said axis of said spindle;

a ramp located at an edge of said one or more disk storage media;

a voice coil motor;

an actuator coupled to said voice coil motor;

a magnetic head held by said actuator, wherein said voice coil motor is configured to control movement of said actuator to load or unload said magnetic head onto said ramp;

a card coupled to said spindle motor configured to drive said spindle motor; and

a firmware coupled to said card, wherein said firmware holds software configured to perform the following steps;

determining a number of load/unload cycles said actuator is designed to handle over its expected lifetime;

determining a maximum rate of load/unload cycles said actuator is designed to handle over a designated period of time using said number of load/unload cycles said actuator is designed to handle over its expected lifetime; and

calculating a rate of load/unload cycles while said hard disk drive is activated during said period of time;

wherein an low power idle state of operation is disabled if said rate of load/unload cycles while said hard disk drive is activated during said period of time is greater than said maximum rate of load/unload cycles said actuator is designed to handle over said designated period of time.

35. The hard disk drive as recited in claim 34, wherein said software is further configured to perform the following steps:

monitoring an amount of time said hard disk drive is activated over said designated period of time; and

monitoring a number of load/unload cycles over said designated period of time.

36. The hard disk drive as recited in claim 35, wherein said rate of load/unload cycles while said hard disk drive is activated during said period of time is calculated using said number of load/unload cycles over said designated period of time and said amount of time said hard disk drive is activated over said designated period of time.