PCIe TO M.2 (B)

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PCIe TO M.2 (B)
PCIe TO M.2 (B).jpg





PCIe TO M.2 (B) is a PCI-E to M.2 adapter card, for upgrading Solid State Drive, supports CM4.Does not support PI5


  • Support NVMe protocol M.2 interface Solid State Drive protocol, high-speed write/read, higher working efficiency.
  • Only support CM4 HAT.
  • Supports Raspberry Pi Compute Module 4.
  • Compatible with M.2 solid state drive in different sizes.
  • The LED lights up when power-on, and keeps blinking while reading/writing.

User Guide

Mounting Hard Drive to CM4


  • Insert the SSD into the corresponding slot of the PCI-E to M.2 adapter, and secure it with the screws provided in the screw package.
  • After powering up and booting, execute "lspci" to check the PCIE device.
PCIe TO M.2 (B) 1.png
  • Execute "sudo mkfs.ext4 /dev/nvme0n1p1" to format the device. ("Type "mkfs." and then press the "tab" key to see various suffixes representing different formats you can use for formatting.)
Wait for a few moments, when "done" appears, it means that the formatting has been carried out. 
PCIe TO M.2 HAT+ W 4.png

Mount the Device

  • Create a directory to mount:
sudo mkdir toshiba
  • Mount the device:
sudo mount /dev/nvme0n1p1 ./toshiba
  • Check the SSD status:
df -h

Mount the Hard Drive

  • Create a new directory as the mount point for the hard drive.
sudo mkdir /home/pi/toshiba
  • Execute the following commands to mount the hard drive:
sudo mount /dev/nvme0n1p1  /home/pi/toshiba

Execute again:

df -h

Then you can see the hard drive we inserted and the related information, indicating that it has been mounted successfully.

  • For different hard drives, their names are different, and here is "nvme0n1p1", please refer to the hard drive you inserted.

Reading/Writing Test

Enter the directory to mount the hard drive:

cd /home/pi/toshiba
  • Release caches:
sudo sh -c "sync && echo 3 > /proc/sys/vm/drop_caches"
  • Copying the contents of the Raspberry Pi's memory to the hard drive (Read):
sudo dd if=/dev/zero of=./test_write count=2000 bs=1024k


  • Copying hard drive content to Raspberry Pi memory (Write):
 sudo dd if=./test_write of=/dev/null count=2000 bs=1024k


  • Note: the test result may vary due to different adapters and environments, and the Raspberry Pi is more susceptible.


Technical Support

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