Method and device for distributing holdup energy to memory arrays

1. A solid-state drive, comprising:

an interface for coupling the solid-state drive to a host system;

one or more memory group modules, each memory group module of the one or more memory group modules including a respective memory controller and non-volatile memory, wherein each respective memory controller is configured to control a plurality of operations within a corresponding memory group module;

a storage device controller coupled to the one or more memory group modules, the storage device controller configured to control a plurality of data transfer operations; and

one or more energy storage devices, each of the one or more energy storage devices for supplying power to one or more corresponding memory group modules during a power fail operation;

wherein the solid-state drive is configured to couple each energy storage device of the one or more energy storage devices to one or more corresponding memory group modules without coupling the energy storage device to the storage device controller during the power fail operation.

2. The solid-state drive of claim 1 , wherein at least one memory group module of the one or more memory group modules is configured to harden data during the power fail operation.

3. The solid-state drive of claim 1 , further comprising volatile memory corresponding to each memory group module of the one or more memory group modules;

wherein hardening data comprises, for a respective memory group module, transferring data to the non-volatile memory within the respective memory group module from the corresponding volatile memory.

4. The solid-state drive of claim 1 , wherein the at least one memory group module is further configured to reset subsequent to hardening the data.

5. The solid-state drive of claim 1 , wherein each memory group module of the one or more memory group modules is configured to disregard signals received from the storage device controller during the power fail operation.

6. The solid-state drive of claim 1 , wherein the one or more memory group modules include at least first and second memory group modules, the one or more energy storage devices include at least first and second energy storage devices, and the solid-state drive is configured to couple the first energy storage device to the first memory group module but not the second memory group module, and is further configured to couple the second energy storage device to the second memory group module but not the first memory group module.

7. The solid-state drive of claim 1 , wherein the one or more energy storage devices consist of a first energy storage device, and the one or more memory group modules comprise a plurality of memory group modules; and

the first energy storage device is coupled to each memory group module of the plurality of memory group modules.

8. The solid-state drive of claim 1 , wherein the one or more memory group modules comprise a plurality of memory group modules; and

wherein a first subset of the plurality of memory group modules are not coupled to the one or more energy storage devices.

9. The solid-state drive of claim 8 , wherein the solid-state drive is configured to prevent the storage of critical data in memory corresponding to the first subset of the plurality of memory group modules.

10. The solid-state drive of claim 1 , wherein the storage device controller is configured to:

receive data from the host system to be written to non-volatile memory;

transfer the data to at least one memory group module of the one or more memory group modules; and

after transferring the data to the at least one memory group module, send an acknowledgement signal to the host, wherein the acknowledgement signal indicates to the host system that the data has been stored in non-volatile memory.

11. The solid-state drive of claim 1 , wherein the solid-state drive further comprises an additional energy storage device coupled to the storage device controller, the additional energy storage device configured to supply power to the storage device controller during the power fail operation, wherein the additional energy storage device is distinct from the one or more energy storage devices.

12. The solid-state drive of claim 11 , further comprising volatile memory associated with the storage device controller; and

wherein the solid-state drive is further configured to transfer data from the volatile memory associated with the storage device controller to at least one memory group module of the one or more memory group modules prior to resetting the storage device controller.

13. The solid-state drive of claim 11 , further comprising volatile memory associated with the storage device controller;

wherein data is stored in the volatile memory associated with the storage device controller; and

wherein the solid-state drive is further configured to reset the storage device controller regardless of the data stored in the volatile memory associated with the storage device controller.

14. The solid-state drive of claim 13 , wherein the data stored in the volatile memory associated with the storage device controller comprises metadata corresponding to a mapping of non-volatile memory in the one or more memory group modules; and

wherein the solid-state drive is further configured to reconstruct the metadata corresponding to the mapping of non-volatile memory in the one or more memory group modules from metadata stored in non-volatile memory of at least one memory group module of the one or more memory group modules subsequent to the power fail operation.

15. The solid-state drive of claim 1 , wherein the solid-state drive is configured to reset the storage device controller during the power fail operation.

16. The solid-state drive of claim 1 , wherein the solid-state drive is configured to:

determine whether a power supply voltage provided to the solid-state drive meets predetermined power fail criteria; and

in accordance with a determination that the power supply voltage meets the predetermined power fail criteria, perform the power fail operation.

17. The solid-state drive of claim 1 , further comprising:

one or more boost regulators, each boost regulator of the one or more boost regulators configured to boost a respective input voltage and having an output coupled to at least one memory group module of the one or more memory group modules; and

one or more selectors, each selector of the one or more selectors configured to selectively couple a respective energy storage device to either an input or an output of a corresponding boost regulator;

wherein a respective selector is configured to couple a respective energy storage device to the output of a corresponding boost regulator during normal operation of the solid-state drive; and

wherein the selector is further configured to couple the respective energy storage device to the input of the corresponding boost regulator during the power fail operation.

18. The solid-state drive of claim 1 , further comprising a regulator module coupled to the interface, the regulator module comprising one or more regulators for supplying power to a first portion of the solid-state drive, wherein the first portion includes at least the one or more memory group modules;

wherein each of the one or more energy storage devices is further coupled to a respective output of the regulator module.

19. The solid-state drive of claim 18 , wherein each energy storage device of the one or more energy storage devices is further configured to buffer power spikes in power received from the respective output of the regulator module.

20. The solid-state drive of claim 18 , wherein the solid-state drive is further configured to decouple the regulator module from at least one energy storage device of the one or more energy storage devices during the power fail operation.

21. The solid-state drive of claim 18 , wherein:

a first memory group module of the one or more memory group modules is coupled to a plurality of regulator module outputs, wherein each output of the plurality of regulator module outputs corresponds to a particular voltage; and

a first respective energy storage device is coupled to the first memory group module and a first output of the plurality of the regulator module outputs;

the regulator module is configured to supply power corresponding to a first voltage via the first output of the plurality of the regulator module outputs during normal operation;

the solid-state drive is configured to decouple the plurality of regulator module outputs from the first memory group module during the power fail operation; and

the first respective energy storage device is configured to supply power corresponding to the first voltage to the first memory group module during the power fail operation.

22. The solid-state drive of claim 1 , wherein

a first memory group module of the one or more memory group modules is configured to prevent corruption of previously committed data by committing data stored in volatile memory corresponding to a particular memory group module of the one or more memory group modules during the power fail operation, regardless of errors in the data.

23. A method of protecting data in a solid-state drive comprising volatile memory and non-volatile memory, the method comprising:

performing a power fail operation on a first section of the solid-state drive, the first section of the solid-state drive comprising one or more memory group modules, and the power fail operation including:

supplying power, via one or more energy storage devices, to the one or more memory group modules, wherein each memory group module of the one or more memory group modules includes a respective memory group module controller; and

supplying power, via an additional energy storage device, to a storage device controller, the storage device controller corresponding to the first section of the solid-state drive;

wherein the additional energy storage device is distinct from the one or more energy storage devices; and

wherein the one or more energy storage devices and the additional energy storage device are each distinct from a power source used during normal operation of the solid-state drive.

24. A non-transitory computer readable storage medium, storing one or more programs for execution by one or more processors of a solid-state drive, the one or more programs including instructions for:

performing a power fail operation on a first section of the solid-state drive, the first section of the solid-state drive comprising one or more memory group modules, and the power fail operation including:

supplying power, via one or more energy storage devices, to the one or more memory group modules, wherein each memory group module of the one or more memory group modules includes a respective memory group module controller; and

supplying power, via an additional energy storage device, to a storage device controller, the storage device controller corresponding to the first section of the solid-state drive;

wherein the additional energy storage device is distinct from the one or more energy storage devices; and

wherein the one or more energy storage devices and the additional energy storage device are each distinct from a power source used during normal operation of the solid-state drive.