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Zorluk: OrtaStorage Devices and Interfaces

A desktop technician installs a replacement M.2 solid-state drive into a workstation motherboard's dedicated M.2 slot. When the system powers on, the drive is not detected in the UEFI/BIOS menu or operating system disk management. The technician verifies that the drive is physically seated properly and secured with the retention screw. Upon inspecting the motherboard specifications, the technician discovers that the slot is wired exclusively for SATA signals, while the installed drive is an M.2 PCIe NVMe SSD. Which of the following best explains why the drive fails to be detected?

  1. The M.2 slot lacks the PCIe bus lane connectivity required to communicate with the NVMe storage protocol.Cevap
  2. B
    The M.2 NVMe drive requires SATA AHCI mode to be enabled in the UEFI/BIOS to translate PCIe signals.
  3. C
    The system power supply unit provides insufficient wattage for the higher operating voltage of NVMe drives.
  4. D
    M.2 NVMe solid-state drives can only function when configured as part of a hardware RAID array in system firmware.

Cevap

The M.2 slot lacks the PCIe bus lane connectivity required to communicate with the NVMe storage protocol.
The correct answer highlights that an M.2 card slot must provide PCIe bus lanes to support NVMe solid-state drives. When an M.2 slot is wired exclusively for SATA signaling, the PCIe host controller on the NVMe SSD cannot establish communication with the system, resulting in the drive not being recognized in the UEFI/BIOS or operating system.

Adım Adım Çözüm

1
Identify the physical and logical requirements of the installed drive.
The drive uses the NVMe protocol, which relies on PCI Express (PCIe) bus lanes for high-speed data transfer.
NVMe drives cannot utilize traditional SATA controller signals.
2
Analyze the motherboard slot specifications.
The motherboard slot only routes SATA bus signals to the connector.
Although M.2 specifies the physical connector form factor, individual slots on motherboards are wired to specific bus interfaces (SATA, PCIe, or both).
3
Determine the cause of the detection failure.
Because the slot lacks PCIe bus routing, the NVMe controller on the drive cannot establish communication with the system chipset or CPU, causing it to remain undetected.
Protocol compatibility requires both physical connector fit and matching underlying bus signaling.

Anahtar Kavram

M.2 Form Factor vs. Storage Bus Protocols (SATA vs. PCIe NVMe)
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Konular

Storage Devices and Interfaces

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