Power sequencing and data hardening architecture

摘要

The various implementations described herein include systems, methods and/or devices used to enable power sequencing and a data hardening module in a storage device. In one aspect, the method includes determining whether a power supply voltage provided to the storage device is lower than an under-voltage threshold. The method further includes, in accordance with a determination that the power supply voltage is lower than the under-voltage threshold, performing a power fail operation, the power fail operation including: (1) signaling a power fail condition to a plurality of controllers on the storage device, (2) transferring data held in volatile memory to non-volatile memory, and (3) removing power from the plurality of controllers on the storage device.

主权项

1. A method of protecting data in a storage device, the method comprising:
determining whether a power supply voltage provided to the storage device is lower than an under-voltage threshold; and in accordance with a determination that the power supply voltage is lower than the under-voltage threshold, performing a power fail operation, the power fail operation including:
signaling a power fail condition to a plurality of controllers on the storage device, the plurality of controllers including a memory controller and one or more flash controllers;transferring data held in volatile memory to non-volatile memory, including:
transferring data, including metadata stored in volatile memory of the memory controller, from the memory controller to the one or more flash controllers; andtransferring data, including the metadata, from the one or more flash controllers to the non-volatile memory; andremoving power from the plurality of controllers on the storage device.