Storage device and method for powering storage device

A method for powering a storage device, comprising:

• detecting a failure of a main power supply of a storage device, the storage device at least including a processor, a baseboard management controller (BMC), a plurality of disks, a first backup power supply and a second backup power supply;
• and
• in response to detecting the failure of the main power supply;
• enabling the first backup power supply to at least power the processor;
• enabling the second backup power supply to at least power the BMC
• obtaining a first electric quantity of the first backup power supply and a second electric quantity of the second backup power supply;
• in response to both the first and second electric quantities being above a threshold electric quantity, enabling a writing cache mode of the storage device;
• and
• in response to at least one of the first and second electric quantities being below the threshold electric quantity, disabling the writing cache mode of the storage device.

A computer program product having a non-transitory computer readable medium which stores a set of instructions to power a storage device;

• the set of instructions, when carried out by computerized circuitry, causing the computerized circuitry to perform a method of:
• detecting a failure of a main power supply of the storage device, the storage device at least including a processor, a baseboard management controller (BMC), a plurality of disks, a first backup power supply and a second backup power supply;
• after detecting the failure of the main power supply, obtaining a first electric quantity of the first backup power supply and a second electric quantity of the second backup power supply;
• in response to both the first and second electric quantities being above a threshold electric quantity, enabling a writing cache mode of the storage device;
• and
• in response to at least one of the first and second electric quantities being below the threshold electric quantity, disabling the writing cache mode of the storage device.