POWER FAIL PROTECTION AND RECOVERY USING LOW POWER STATES IN A DATA STORAGE DEVICE/SYSTEM

摘要

Systems and methods for early warnings of power loss in solid state storage drives are disclosed. Early warnings of power loss can be used to power the drive to force the drive into a low power states before the energy in backup power sources, such as backup capacitors, is used. The low power states can allow for the reduction of power use by the drive which can provide cost savings and reduction in the risk that the drive will be rendered reconfigurable by a power failure event.

主权项

1. A data storage device comprising:
a non-volatile solid-state memory array comprising a plurality of non-volatile memory devices configured to store data; a volatile memory array configured to store data; a reserve power circuit comprising at least one energy storage device; and a controller having a power input configured to receive power from a primary power source for powering the data storage device during normal operation; wherein the controller is configured to:
in response to detect that a loss of power from the primary power source is impending while receiving power from the primary power source; andin response to said detecting, cause the storage device to enter a first reduced power state, wherein power consumption of the device is reduced and a first portion of data stored in the volatile memory array is stored in the non-volatile solid-state memory array using power from the primary power source; wherein the storage device does not use power from the reserve power circuit while in the reduced power state.