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PCIe M Key

Brief introduction​

The PCIE M Key interface is an interface standard for connecting high-performance expansion devices, typically on motherboards. It is one of the physical interface forms of the PCI Express (PCIe) bus.The M Key interface typically contains multiple lanes and supports higher data transfer rates, making it ideal for connecting high-performance devices.

Support List​

Interface Test Method​

Viewing Capacity​

  • Installing NVME Related Tools
radxa@rock-5-itx:~$ sudo apt-get install nvme-cli
  • View Capacity
radxa@rock-5-itx:~$ sudo nvme list
[sudo] password for radxa:
Node             SN                   Model                                    Namespace Usage                      Format           FW Rev
---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
/dev/nvme0n1     50026B7684E3662B     KINGSTON OM8PDP3256B-A01                 1         256.06  GB / 256.06  GB    512   B +  0 B   EDFK0S03

Based on the above output, the storage capacity of the SSD is 256.06 GB.

Speed measurement​

  • Installing the FIO Tool
sudo apt install fio
  • Writing test
fio write
  • Reading test
fio read

Booting the system from NVME​

Please refer to the following documentation: