A technician is installing a newly purchased M.2 solid-state drive into a motherboard's M.2 expansion slot. The drive physically fits and secures properly into the slot, but upon booting the system, the BIOS/UEFI fails to recognize the drive. Upon reviewing the motherboard specification manual, the technician notes that the designated M.2 slot operates exclusively via PCIe x4 lanes. Which of the following is the most likely cause of the drive detection failure?
- The installed M.2 drive relies on the SATA interface protocol, which is unsupported by the PCIe-only motherboard slot.Cevap
- BThe M.2 drive was inserted into an M.2 slot that requires a dedicated 8-pin EPS auxiliary power connector directly from the power supply.
- CThe drive requires dual-channel RAM configuration in adjacent motherboard DIMM slots to enable NVMe initialization.
- DThe motherboard failed POST because the system power supply could not generate a power-good signal to the M.2 interface.
Cevap
The installed M.2 drive relies on the SATA interface protocol, which is unsupported by the PCIe-only motherboard slot.
Although the M.2 form factor specifies standardized card sizes and physical keying (such as B-key, M-key, or B+M key), the motherboard controller must support the specific bus protocol utilized by the drive. If an M.2 slot only supports PCIe/NVMe, a SATA-based M.2 SSD will fit physically but cannot communicate with the motherboard storage controller, resulting in the drive not being detected in the BIOS/UEFI.
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Anahtar Kavram
M.2 Form Factor vs. Interface Protocols (SATA vs. NVMe/PCIe)