APPARATUS, SYSTEM, AND METHOD FOR POWER REDUCTION IN A STORAGE DEVICE

• US 20110060927A1
• Filed: 09/09/2010
• Published: 03/10/2011
• Est. Priority Date: 09/09/2009
• Status: Active Grant

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: Fusion-IO Incorporated (Western Digital Corporation)
• Inventors: Thatcher, Jonathan, Fillingim, Jeremy, Strasser, John
• Granted Patent: US 8,429,436 B2
• Time in Patent Office: Days
• US Class Current: 713/320
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24
• CPC Class Codes: G06F 11/1048 using arrangements adapted for a specific error detection or correction feature
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G06F 11/1441 Resetting or repowering
• CPC Class Codes: G06F 11/1471 involving logging of persistent data for recovery
• CPC Class Codes: G06F 11/2015 Redundant power supplies power supply failure G06F1/30
• CPC Class Codes: G06F 11/3034 where the computing system component is a storage system, e.g. DASD based or network based digital input from or digital output to record carriers G06F3/06; digital recording or reproducing G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: G06F 11/3058 Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations thermal management in cooling arrangements of a computing system G06F1/206
• CPC Class Codes: G06F 2201/81 Threshold
• CPC Class Codes: G11C 16/10 Programming or data input circuits
• CPC Class Codes: G11C 16/30 Power supply circuits
• CPC Class Codes: G11C 5/141 Battery and back-up supplies

Abstract

An apparatus, system, and method are disclosed for managing power consumption in a data storage device. An audit module monitors a power consumption rate of the data storage device relative to a power consumption target. A throttle module adjusts execution of one or more operations on the data storage device in response to the power consumption rate of the data storage device failing to satisfy the power consumption target. A verification module verifies whether the power consumption rate of the data storage device satisfies the power consumption target in response to adjusting the execution of the one or more operations.

Claims

1. A method to manage power consumption in a data storage device, the method comprising:

monitoring a power consumption rate of a data storage device relative to a power consumption target;

adjusting execution of one or more operations on the data storage device in response to the power consumption rate of the data storage device failing to satisfy the power consumption target; and

verifying whether the power consumption rate of the data storage device satisfies the power consumption target in response to adjusting the execution of the one or more operations.

2. The method of claim 1, wherein the power consumption target comprises a power consumption ceiling defining an allowed upper bound for the power consumption rate of the data storage device, and wherein failing to satisfy the power consumption target comprises the power consumption rate approaching the power consumption ceiling.

3. The method of claim 1, further comprising readjusting execution of one or more subsequent operations on the data storage device in response to verifying that the power consumption rate fails to satisfy the power consumption target in response to adjusting the execution of the one or more operations.

4. The method of claim 1, further comprising,

monitoring a temperature for the data storage device relative to a thermal ceiling;

adjusting execution of the one or more operations on the data storage device in response to the temperature approaching the thermal ceiling; and

verifying whether the temperature is moving away from the thermal ceiling in response to adjusting the execution of the one or more operations.

5. The method of claim 4, further comprising combining the adjustment of execution of the one or more operations in response to the power consumption rate with the adjustment of execution of the one or more operations in response to the temperature into a single adjustment.

6. The method of claim 1, wherein adjusting execution of the one or more operations comprises reducing a frequency with which the one or more operations execute on the data storage device.

7. The method of claim 6, wherein reducing the frequency with which the one or more operations execute comprises setting a timer value specifying a frequency with which hardware of the data storage device polls to verify that an operation has completed.

8. The method of claim 7, wherein the data storage device comprises a nonvolatile solid-state storage device and the timer value comprises a tPROG time specifying a period of time between submitting a program command to a memory area of the data storage device and submitting a status command to the same memory area of the data storage device to verify that execution of the program command has completed.

9. The method of claim 6, wherein reducing the frequency with which the one or more operations execute comprises setting a timer value specifying a frequency with which the one or more operations are submitted to the data storage device for execution.

10. The method of claim 1, wherein the power consumption target comprises a number of quanta that defines an amount of energy to be used during a period of time and the one or more operations on the data storage device are assigned quanta based on an amount of energy used to perform an operation.

11. The method of claim 10, wherein adjusting the execution of the one or more operations comprises scheduling the one or more operations based on the assigned quanta.

12. The method of claim 11, wherein each operation of the one or more operations is divided into time periods and each time period of the operation is assigned one or more quanta based on an amount of energy used to perform the operation during the time period.

13. The method of claim 1, wherein adjusting execution of the one or more operations comprises selecting operations from one or more queues of operations to be executed such that an amount of energy used to execute the selected operations satisfies the power consumption target.

14. A method to manage a thermal state of a data storage device, the method comprising:

monitoring a temperature for a data storage device relative to a thermal ceiling;

adjusting execution of one or more operations on the data storage device in response to the temperature approaching the thermal ceiling; and

verifying whether the temperature is moving away from the thermal ceiling in response to adjusting the execution of the one or more operations.

15. The method of claim 14, further comprising readjusting execution of one or more subsequent operations on the data storage device in response to verifying that the temperature fails to move away from the thermal ceiling in response to adjusting the execution of the one or more operations.

16. The method of claim 14, further comprising,

monitoring a power consumption rate of the data storage device relative to a power consumption target;

adjusting execution of the one or more operations on the data storage device in response to the power consumption rate of the data storage device failing to satisfy the power consumption target; and

verifying whether the power consumption rate of the data storage device satisfies the power consumption target in response to adjusting the execution of the one or more operations.

17. The method of claim 16, further comprising combining the adjustment of execution of the one or more operations in response to the temperature with the adjustment of execution of the one or more operations in response to the power consumption rate into a single adjustment.

18. A method to manage power consumption in a data storage device, the method comprising:

receiving a set of concurrent operations for execution on a data storage device, the concurrent operations each having an associated operation type;

determining a type for at least two operations in the set of concurrent operations; and

scheduling two or more concurrent operations from the set of concurrent operations based on the type of each operation such that a power consumption rate for the data storage device does not exceed a power consumption ceiling during concurrent execution of the two or more concurrent operations.

19. The method of claim 18, wherein scheduling the two or more concurrent operations comprises scheduling a predefined number of operations of a predefined type for concurrent execution on the data storage device.

20. The method of claim 19, wherein scheduling the two or more concurrent operations further comprises delaying, for at least a predefined duration, execution of one or more concurrent operations of a predefined type in response to concurrently executing the predefined number of operations.

21. The method of claim 20, wherein the predefined duration is less than an execution time for the predefined type of operation such that execution of the one or more operations overlaps execution of the predefined number of operations and no more than the predefined number of operations of the predefined type of operation begin execution on the data storage device at a time.

22. The method of claim 21, wherein the predefined type of operation comprises an erase operation type on the data storage device and execution of an operation of the erase operation type consumes more power during the predefined duration than after the predefined duration.

23. A system to manage power consumption in a plurality of data storage devices, the system comprising:

a plurality of data storage devices receiving electric power from a power source;

one or more audit modules configured to monitor a power consumption rate of at least one of the plurality of data storage devices relative to a power consumption target;

one or more throttle modules configured to adjust execution of operations on the plurality of data storage devices in response to the power consumption rate of the at least one of the plurality of data storage devices failing to satisfy the power consumption target; and

one or more verification modules configured to verify whether the power consumption rate of the at least one of the plurality of data storage devices satisfies the power consumption target in response to adjusting the execution of the operations.

24. The system of claim 23, wherein the one or more throttle modules adjust execution of the operations substantially identically for each of the plurality of data storage devices in response to the power consumption rate of a single one of the plurality of data storage devices failing to satisfy the power consumption target.

25. The system of claim 23, wherein the power consumption target comprises a system power consumption target for the plurality of data storage devices and the one or more throttle modules adjust execution of the operations on each of the plurality of data storage devices dynamically such that a total power consumption rate of the plurality of data storage devices satisfies the system power consumption target.

26. The system of claim 23, wherein,

the one or more audit modules are further configured to monitor temperatures of the plurality of data storage devices relative to a thermal ceiling;

the one or more throttle modules are further configured to adjust execution of the operations on a data storage device from the plurality of data storage devices in response to the temperature of the data storage device from the plurality of data storage devices approaching the thermal ceiling; and

the one or more verification modules further configured to verify whether the temperature of the data storage device from the plurality of data storage devices is moving away from the thermal ceiling in response to adjusting the execution of the operations.

27. The system of claim 26, wherein the one or more throttle modules adjust execution of the operations substantially identically for each of the plurality of data storage devices in response to the power consumption rate of the at least one of the plurality of data storage devices failing to satisfy the power consumption target and adjust execution of the one or more operations independently for each individual data storage device of the plurality of data storage devices in response to the temperature of the corresponding individual data storage device approaching the thermal ceiling.

28. A system to manage thermal states for a plurality of data storage devices, the system comprising:

a plurality of data storage devices;

one or more audit modules configured to monitor a temperature of at least one of the plurality of data storage devices relative to a thermal ceiling;

one or more throttle modules configured to adjust execution of operations on the plurality of data storage devices in response to the temperature of the at least one of the plurality of data storage devices approaching the thermal ceiling; and

one or more verification modules configured to verify whether the temperature of the at least one of the plurality of data storage devices is moving away from the thermal ceiling in response to adjusting the execution of the operations.

29. The system of claim 28, wherein,

the one or more audit modules are further configured to monitor a power consumption rate of one or more of the plurality of data storage devices relative to a power consumption target;

the one or more throttle modules are further configured to adjust execution of the operations on the plurality of data storage devices in response to the power consumption rate of the one or more of the plurality of data storage devices failing to satisfy the power consumption target; and

the one or more verification modules further configured to verify whether the power consumption rate of the one or more of the plurality of data storage devices satisfies the power consumption target in response to adjusting the execution of the operations.