SSD Not Detected by Operating System or BIOS

To confirm the symptom, enter the system BIOS/UEFI menu during startup using the designated key (e.g., F2, Del, or F12). Navigate to the 'Storage,' 'SATA Configuration,' or 'Boot' menu. If the drive's model name and serial number are not listed, the system is failing to establish a low-level electrical handshake with the SSD controller, confirming the drive is invisible to all connected operating systems.