Data storage device including self-test features
First Claim
Patent Images
1. A data storage assembly connectable to a host system comprising:
- one or more data storage media comprising one or more rotating discs powered by a spindle motor utilizing power from a host system in normal operation;
an auxiliary power source comprising back electromotive force (EMF) derived from momentum of the rotating discs via the spindle motor configured to supply power to store data to the one or more data storage media in event of a loss of power from the host system; and
test circuitry configured to test a usable energy available from momentum associated with the one or more spinning discs to supply the power to store the data in the event of the loss of power from the host system by interrupting power to the storage device, writing data to the one or more storage media until usable energy derived from momentum of the rotating discs via the spindle motor is exhausted, and determining how much usable energy is available based on the amount of data written after interrupting power to the storage device.
2 Assignments
0 Petitions
Accused Products
Abstract
The application discloses a data storage device including one or more data storage media adapted to store data. The data storage device is connected to and powered by a power source of the host system. In the event of a loss of power from the host system, an auxiliary power source is used to power components of the data storage device. For example, an illustrative auxiliary power source uses back electromotive force EMF from a spindle motor of the data storage device. As disclosed, the device includes test circuitry to test a capacity of the auxiliary power source to store data in the event of the loss of power from the host system.
39 Citations
18 Claims
-
1. A data storage assembly connectable to a host system comprising:
- one or more data storage media comprising one or more rotating discs powered by a spindle motor utilizing power from a host system in normal operation;
an auxiliary power source comprising back electromotive force (EMF) derived from momentum of the rotating discs via the spindle motor configured to supply power to store data to the one or more data storage media in event of a loss of power from the host system; and test circuitry configured to test a usable energy available from momentum associated with the one or more spinning discs to supply the power to store the data in the event of the loss of power from the host system by interrupting power to the storage device, writing data to the one or more storage media until usable energy derived from momentum of the rotating discs via the spindle motor is exhausted, and determining how much usable energy is available based on the amount of data written after interrupting power to the storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- one or more data storage media comprising one or more rotating discs powered by a spindle motor utilizing power from a host system in normal operation;
-
8. A data storage assembly comprising:
-
a data storage media comprising one or more rotatable discs; a spindle motor coupled to the one or more rotatable discs; an auxiliary power source comprising back electromotive force (EMF) derived from momentum of the rotating discs via the spindle motor that provides auxiliary power; and test circuitry configured to test a usable energy available from momentum associated with the one or more spinning discs at a given rotational speed to supply the auxiliary power to store data in an event of a power loss from a host system by interrupting power to the storage device, writing data to the one or more storage media until usable energy derived from momentum of the rotating discs via the spindle motor is exhausted, and determining how much usable energy is available based on the amount of data written after interrupting power to the storage device. - View Dependent Claims (9, 10, 11)
-
-
12. A method comprising:
-
disconnecting a data storage device including one or more rotating discs powered by a spindle motor from a power source of a host system; supplying power to one or more components of the data storage device utilizing an auxiliary power source of the data storage device comprising back electromotive force (EMF) derived from momentum of the rotating discs via the spindle motor; and testing a capacity of the auxiliary power source to supply the power the one or more components of the data storage device by writing data to the one or more storage media until usable energy derived from momentum of the rotating discs via the spindle motor is exhausted, and determining how much usable energy is available based on the amount of data written after disconnecting the data storage device from the power source of the host system. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
Specification