METHOD FOR HANDLING COMMAND IN CONFLICT SCENARIO IN NON-VOLATILE MEMORY EXPRESS (NVMe) BASED SOLID-STATE DRIVE (SSD) CONTROLLER

A method for handling a command identification (ID) conflict in a non-volatile memory express (NVMe)-based solid-state drive (SSD) device, the method comprising:

• fetching, by a command fetching unit of an SSD controller, one or more commands submitted by a host to a host submission queue;
• checking, by a tag allocation unit of the SSD controller, if there is a command ID conflict in the one or more commands fetched from the host submission queue;
• triggering, by the tag allocation unit, a command ID (CID) error interrupt to a device firmware of the SSD device in response to detecting the command ID conflict for a first command among the one or more commands fetched from the host submission queue;
• performing, by the device firmware of the SSD device, a command validation of the one or more commands in response to receiving the CID error interrupt;
• submitting, by a response generation unit of the SSD device, a command response with additional special information, comprising a host submission queue slot information, from the device firmware of the SSD device to the host, that has the command ID conflict for the first command;
• and
• releasing, by the device firmware of the SSD device, a resource associated with the one or more commands based on the command response.