Wireless Type | Bluetooth |
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Argon ONE M.2 SATA Expansion Board for Raspberry Pi 4 | Supports B-Keys and B+M Keys | Only Compatible with Argon ONE V2 Cases
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Purchase options and add-ons
Brand | Argon Forty |
Color | M.2 BOARD |
Connectivity Technology | USB |
Operating System | Linux |
Wireless Communication Standard | Bluetooth |
About this item
- Adds M.2 SATA SSD Compatibility to your Raspberry Pi 4. These expansion boards only work with Argon ONE Raspberry Pi 4 Case, which are sold separately.
- The Raspberry Pi SSD Case is only compatible with M.2 SATA SSDs with B-Key or B+M Key. The SSD connects to the Raspberry Pi 4 via USB bridge at a USB 3.0 Port.
- The Argon M.2 Board maximizes the high speed data transfers for Raspberry Pi 4 SSD usage; making your Argon Raspberry Pi Case perfect for multimedia usage.
- With this Raspberry Pi sata board, your Argon Pi 4 case becomes an Argon ONE M.2 Case for Raspberry Pi 4; allowing you boot your OSes through your SSD.
- Package includes the following items: M.2 SSD Sata Board, USB3.0 Bridge, plastic bottom, 2 thermal pads, 4 screws, 4 rubber footing, and instruction manual
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Product Description


Argon ONE M.2 SATA Expansion Board

M.2 Sata SSD Compatibility

SSD Bootable

UASP Supported for Raspberry Pi 4

Designed for the Argon Pi 4 cases
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Product information
Technical Details
Brand | Argon Forty |
---|---|
Item model number | A20-007-AR-MDT-EB |
Hardware Platform | Raspberry Pi |
Operating System | Linux |
Item Weight | 2.65 ounces |
Product Dimensions | 4.33 x 3.82 x 0.71 inches |
Item Dimensions LxWxH | 4.33 x 3.82 x 0.71 inches |
Color | M.2 BOARD |
Hard Drive Interface | Serial ATA-600 |
Power Source | DC |
Manufacturer | Argon Forty |
ASIN | B08MHYWJCP |
Country of Origin | China |
Date First Available | November 3, 2020 |
Additional Information
Customer Reviews |
4.6 out of 5 stars |
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Best Sellers Rank | #397 in Single Board Computers (Computers & Accessories) |
Warranty & Support
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Customer reviews
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Reviewed in the United States on May 22, 2022
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Caveats & Warnings:
------------------------------
This expansion is ONLY compatible with the "V2" version of the Argon One case. You have the correct case version, if the case has cutouts for 2 full sized HDMI ports.
------------------------------
The "Buy With" recommendations on the Amazon product page, ***MIGHT*** suggest a SATA3 SSD. This product is ONLY COMPATIBLE with SATA II SSD drives; with a form factor of 2280, 2260, 2242, or 2230.
------------------------------
The SSD socket ONLY ACCEPTS SSD that are "B" or "B+M" keyed. The socket WILL NOT accept an SSD that is only "M" keyed.
------------------------------
Remember, by itself, a Raspberry Pi 4B uses about 5 watts. And the M.2 SSD requires up to another 5 watts. WATTAGE IS ADDITIVE -- Use a good 15 to 20 watt power adaptor.
------------------------------
A magnetized screwdriver, and a magnetic tray or dish, is strongly recommended.
==============================
The "default" for the standoff and mount point of the SSD is at the 2280 position (see pictures). If you are using a smaller form factor, reposition the standoff NOW, and DO NOT LOSE THE MOUNTING SCREW.
You know that you've properly seated the SSD into the socket, when you can make it "stand up" in the socket; before locking down the SDD with the mounting screw (see pictures).
Once you attach the expansion to the existing Argon One case; you will LOSE EXTERNAL ACCESS to the micro SD card slot. If you plan to boot directly off the SSD, remove the SD card NOW. Pi 4B whose EEPROM contain bootloaders dated 2021 or later, will boot off the SSD, if the SD card slot is empty. If you want to change the boot order, or need to update your EEPROM, do it before proceeding.
You can image your SSD, by connecting it directly to your PC, with a USB-A to USB-A cable. The interface will show up as a USB device named "FORTY," and the Pi Imager software will recognize the SSD as a USB SCSI drive; of the size that you mounted in the SSD socket. Like the SD card; the Pi Imager will divide the SSD into 2 partitions of VFAT and EXT4.

Reviewed in the United States 🇺🇸 on May 22, 2022
Caveats & Warnings:
------------------------------
This expansion is ONLY compatible with the "V2" version of the Argon One case. You have the correct case version, if the case has cutouts for 2 full sized HDMI ports.
------------------------------
The "Buy With" recommendations on the Amazon product page, ***MIGHT*** suggest a SATA3 SSD. This product is ONLY COMPATIBLE with SATA II SSD drives; with a form factor of 2280, 2260, 2242, or 2230.
------------------------------
The SSD socket ONLY ACCEPTS SSD that are "B" or "B+M" keyed. The socket WILL NOT accept an SSD that is only "M" keyed.
------------------------------
Remember, by itself, a Raspberry Pi 4B uses about 5 watts. And the M.2 SSD requires up to another 5 watts. WATTAGE IS ADDITIVE -- Use a good 15 to 20 watt power adaptor.
------------------------------
A magnetized screwdriver, and a magnetic tray or dish, is strongly recommended.
==============================
The "default" for the standoff and mount point of the SSD is at the 2280 position (see pictures). If you are using a smaller form factor, reposition the standoff NOW, and DO NOT LOSE THE MOUNTING SCREW.
You know that you've properly seated the SSD into the socket, when you can make it "stand up" in the socket; before locking down the SDD with the mounting screw (see pictures).
Once you attach the expansion to the existing Argon One case; you will LOSE EXTERNAL ACCESS to the micro SD card slot. If you plan to boot directly off the SSD, remove the SD card NOW. Pi 4B whose EEPROM contain bootloaders dated 2021 or later, will boot off the SSD, if the SD card slot is empty. If you want to change the boot order, or need to update your EEPROM, do it before proceeding.
You can image your SSD, by connecting it directly to your PC, with a USB-A to USB-A cable. The interface will show up as a USB device named "FORTY," and the Pi Imager software will recognize the SSD as a USB SCSI drive; of the size that you mounted in the SSD socket. Like the SD card; the Pi Imager will divide the SSD into 2 partitions of VFAT and EXT4.



At a high-level, I am dissatisfied with:
• fit and finish
• the chosen SSD interface
• the included 180 degree USB 3.0 connector
• thermals/ventilation, and loss of SSD card access
First up - fit and finish. It appears that the plastic on this wasn't as well cut as the "original" case on the Argon one. Not a major deal, but certainly an annoyance when I gave myself a little paper cut of sorts. Issue solved with a little 600 grit sandpaper to round over the edges. Acceptable enough fit and finish on a cheap product, but not a great first impression. I was also dismayed to find that the microSD card slot is blocked by the adapter - I believe that the PCB could have been designed differently to allow for the microSD card to remain accessible.
SSD compatibility: Conceptually - I don't mind that this uses SATA M.2 SSDs. While NVMe SSDs may be higher-performing drives, you're limited by the USB 3.0 interface on the Pi 4 - many of the performance benefits of NVMe aren't going to be visible to the end user. However, NVMe drives are becoming more ubiquitous, while M.2 SATA SSDs are becoming more niche - as of Q2 2021, NVMe drives are approaching price parity with M.2 SATA SSDs.
The 180 degree USB adapter: I had a lot of problems with this. I had issues cloning my SD card to this, writing a new image to the drive, etc. In order to resolve the issue, I bought a 3-foot USB A to USB A (which is non-compliant in design) and resolved my issue. It seems that this USB 3.0 adapter doesn't work or works inconsistently enough to cause boot and write issues.
Thermals: The standard base plate has ventilation holes that allow the argon ones fan to draw in fresh air. The PCB on the M.2 base blocks much of that airflow - increasing temps on the Pi. Furthermore, the base plate is so slim it makes adding a SSD heatsink difficult. I purchased the slimmest SSD heatsink I could, and it presses up against the through-hole legs on the IO board. I had to use Kapton tape to prevent short circuits. If the M.2 base was another 2-3mm taller, that would be less of a concern. Finally, there is no temperature probe on the M.2 board - so with the poor ventilation and limited opportunities to exfil heat, it's hard to quantify the risk.
In hindsight, I wish I had gone with an external USB-C NVMe or 3.5 SATA enclosure. With some command strips, I could have had a reasonably compact platform and better flexibility.
Top reviews from other countries

Dieses Umrüstkit hier bietet die perfekte Lösung um ein vorhandenes Argon One für SSD umzubauen.
Es enthält den USB Winkelstecker, die eigentliche SSD-Platine und einen passenden Gehäuseboden. 4 Schrauben und Gummifüße sind ebenfalls dabei. Preislich nimmt es sich nicht viel, das Argon One in M2 ausführung kostet in etwas so viel wie eines ohne M2+Erweiterungskit.
Der Umbau geht sehr schnell.
Einziger bisher festgestellter Nachteil: Der microSD Kartenslot ist nicht mehr zugänglich.
Den braucht man aber nicht mehr wirklich, denn der Raspi ist mit der SSD so richtig schnell.
Raspberry Pi OS bootet von meiner Crucial MX500 innerhalb von 25s vom Einschalten bis zum Desktop.
Dank des USB Winkeladapters kann man die SSD zur Installation neuer Images einfach mit dem PC verbinden.
Dieser verbindet nämlich lediglich einen der USB3 Ports des Raspberry mit dem USB3 Port der M2 Erweiterungsplatine. Winkelstecker herausziehen, ein USB-Kabel (Typ A, Stecker<->Stecker) anschließen und an den PC.
Das Erweiterungsboard wird als USB-Laufwerk erkannt und kann wie ein USB-Stick mit den gängigen Tools mit Images geflasht werden.
Zum Argon One selbst schreibe ich an dieser Stelle nicht mehr viel. Das Gehäuse ist vermutl. das Beste was man für den Pi4 kaufen kann. Auf dem Raspi läuft bei mir Homeassistant. Es hält die CPU auch ohne Lüfter immer unter 50°C.
Zusammen mit dem M2 Kit jetzt für mich die perfekte Lösung.

I'm using mine as a boot drive for a homeassistant install - so far so good! And should be much more robust for consistent reads and writes compared to running from an SD card
There are a couple of things to note however:
- It covers the SD card slot completely when installed. This isn't an issue for my usecase, but i'd imagine it may be for others
- This does NOT support NVMe drives, only SATA
- Burning an OS image to the SSD was a bit of an odd task. I do not have an M.2 to usb caddy or adaptor other than this case. So, I had to adapt the female USB A port on this device to male using the included adaptor, and then run a USB extension to my PC. It worked fine, but i kind of expected a standard downstream connector like a micro USB female port or similar so that the case could be connected to a PC for imaging using a standard cable. Without a USB extension i would have had purchase a USB A to USB A cable which exist, but are not common at all, or a second USB to M.2 Adaptor just to be able to use this USB to M.2 Adaptor. (I'm sure theres a way to burn an image to the disk using the PI itself to avoid this, i just didnt consider that as i'm not running Raspberry PI OS, seemed silly installing an OS just to install another OS)
Overall very pleased however. I'd definitely recommend the upgrade if you have an Argon 1 case

It has a little u-shaped USB-3 adaptor that connects it to the Pi, using up one of the ports. This is where the problem occurs- the SSD draws power from the host Pi, rather than having the base power the SSD and the Pi.
The RPi 4 can supply 6W total (1.2A at 5V) shared across all of its USB ports. A Samsung 960 EVO M.2 SATA 1TB is rated as drawing 3W according to Samsung. However, in use, the drive will run out of power and disconnect after a little bit of uptime.
It's not super-predictable- running all four cores flat out, GPU running a fullscreen GLXgears, a multithreaded storage benchmark occupying the SSD and a speed test keeping the Wifi busy didn't cause an immediate drop. Instead, they seem to occur when the machine is just running at moderate load, but in use (i.e. running a browser etc.). Poking around in powertop, it doesn't seem to be USB sleep, just the drive shutting down for a lack of power.
The unit was running from a powerful USB-C PD supply, and behaves the same whether I use a small 20W supply, a Lenovo 65W supply, or a beefy Apple PSU up in the nineties.
This was so close to an amazing accessory. When it's working, it's nice and fast, 300MB/sec or so sequential reads, lots of IOPS, speedy booting, but it's just not working with any reasonable quality and available M.2 SATA drive. If the base powered the drive and the Pi itself, this would be a non-issue, but obviously it's cheaper and simpler to make it a simple parasitic USB device.
Obviously, you could work around this by connecting the base to the Pi via a powered USB 3 hub (costing a multiple of the price of the base) via A to A cables - but that largely negates the advantage of being neat, tidy and self-contained. If you went down that road, you may as well just use any other external USB enclosure supporting UASP would work well.
So close to good. I am going to try a smaller model of the SSD with an even smaller rated draw. If that's not stable, I'll return this base, run the case without it and pick up a standard UASP case instead.


Great addon.