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 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,
• wherein performing the command validation by the device firmware of the SSD device comprises:
• comparing, by the device firmware of the SSD device, the one or more commands to determine a first difference between the commands having a same command ID and from a same host submission queue and the host submission queue slot information from which the one or more commands are fetched.