Introduction

The Pintry X2 is a two bay NAS (Network Attached Storage) based on the Raspberry Pi Compute Module 4. It uses the ASMedia AS1061 PCIe to Sata bridge to connect up to 2 drives (3.5'/2.5' HDD or 2.5' SSD) to the SoM running a Linux based OS (Raspberry Pi OS).

Website

Here is a link for additional information: https://www.cezarchirila.com/projects/pintry-x2.html

Features

• Supports both CM4 and CM4 lite variants
• 2 x SATA ports with power using ASM1061. It should work with both 2.5' and 3.5' HDDs/SSDs but so far it has only been tested with 2.5' SSDs (Western Digital WDS500G2B0A)
• On/Off switch - Can both wake up the CM4 or shut it down (see Device Tree Overlay section)
• 2 x Fan headers (PWM pin connected, Tach pin unconnected)
• 12V Input Power (max 5A, required for 3.5' drives).
• USB 2.0 Host port for connecting USB devices and a microUSB Device port for updating the eMMC on CM4.
• Expander header for access to various GPIO

Names have a meaning

Pi + Pantry = Pintry

Device Tree Overlay

Add these changes at the end of the /boot/config.txt to enable specific functionality:

# Enable FAN control for FAN0
dtoverlay=gpio-fan,gpiopin=12

# Enable FAN control for FAN1
#dtoverlay=gpio-fan,gpiopin=13

# Enable full functionality of On/Off button
dtoverlay=gpio-shutdown,gpio_pin=21,active_low=0,gpio_pull=off

# Enable UART - UNTESTED
#dtoverlay=uart0,txd0_pin=14,rxd0_pin=15,pin_func=4
#enable_uart=1  

Remember to remove the '#' in from of options you want to enable.

Kernel

Previously, to be able to use SATA drives with a CM4 you had to recompile the kernel with added SATA support. See instructions here (credit to Jeff Geerling for instructions). However, newer kernel versions have SATA support built-in, so you should not have to worry about this.

Enclosure

The enclosure supports 2.5' drives only. It does not have any mounting features for fans, but there is room for a 60mm fan on the bottom as shown in the images below. It does not need supports for printing. Designed in Fusion 360.

For assembly, you will need the following:

• 4 x M3 brass inserts (D0.46mm, L0.57mm)
• 4 x M3x18mm socket screws - for mounting the drives
• 4 x M3x25mm socket screws - for mounting the drives
• 4 x M3x35mm socket screws - for joining the two halves of the enclosure

Thermal management

To keep temperatures under control, I have used a RAM heatsink on the ASM1061 IC and a 60mm fan on the bottom of the enclosure tied to the FAN header and controlled via the 'gpio-fan' overlay. It is mounted in such way that it blows air over both the CM4 and the ASM1061.

Release

The current latest release is V1.1. This version has not been tested or manufactured yet, therefore I would suggest double checking it if you plan on bulding it! All the necessary manufacturing and assembly files are in the 'OutputJob/Version' and 'Enclosure' folders.