120GB 2.5-inch MakerDisk SATA III SSD with RPi OS

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Note: 120GB 2.5-inch MakerDisk SATA III SSD shipped from 11 Nov 2021 onwards is loaded with the latest Raspberry Pi OS – Bullseye (release date: 30th October 2021).

RPi OS Bullseye 2P5

Note: This SSD comes Pre-loaded with Raspberry Pi OS and ready to boot up on Raspberry Pi 4 Model B (with latest bootloader firmware) or Raspberry Pi 400. Please DO NOT format it if you intend to use it with the Raspberry Pi board.


2.5″ SATA III SSD for Raspberry Pi 4 Model B and Raspberry Pi 400

We, at Cytron Technologies, are pretty excited with the stable release of USB boot firmware and have also released a reliable SSD in 2.5″ form factor. We called it MakerDisk! A Disk from Makers to Makers 🙂 It is a 2.5″ SATA III (6.0 Gbps) Solid State Drive (SSD) with a capacity of 120GB.

MMR 2P5 MD 120 b

Everyone is booting the preferred Operating System for the Raspberry Pi 4 Model B from USB 🙂 The USB Boot firmware for Raspberry Pi 4 Model B is now officially released as a stable version. Check out this review video by leespsvideo on this 2.5″ SSD, booting up on Raspberry Pi 4 Model B/400 right out of the box. He also runs several speed tests with Raspberry Pi Diagnosis:


Booting Raspberry Pi OS and opening Apps/Programs from MakerDisk SSD is faster than the microSD card. Here are the speed test results that we get using Raspberry Pi Diagnostics: (The MakerDisk is connected to Raspberry Pi through SSD Shield to USB3.0 port of Raspberry Pi 4 Model B).

RPI Diagnostics 2P5 120 a

  • Sequential write speed 280068 KB/sec (target 10000) – PASS, over 28 times faster than the target
  • Random write speed 14948 IOPS (target 500) – PASS, nearly 30 times faster than the target
  • Random read speed 13149 IOPS (target 1500) – PASS, nearly 9 times faster than the target

Here is a comparison table between the 128GB Phidisk microSD and MakerDisk 120GB 2.5″ SATA III SSD:

MakerDisk microSDvsSSD Table

Note: Raspberry Pi Diagnosis result depends on many factors (New memory or used memory, interface, SATA interface, USB interface, USB cable, etc). It should be taken as a reference only.

This 2.5-inch MakerDisk SSD has a maximum sequential read and writes speed of up to 550MB/s and 460MB/s respectively. The above results are limited by the USB3.0 to SATA interface.

MMR 2P5 MD 120 sd

Note: This MakerDisk SSD is PRE-LOADED with the Raspberry Pi OS, so you can use it with Raspberry Pi 4 Model B or Raspberry Pi 400 right out of the box (if the Raspberry Pi is ready with USB boot). Of course, you will still need a SATA to USB bridge such as USB3.0 SATA Shield or USB3.0 to 2.5″ SATA Adapter.


Is Your Raspberry Pi 4 Model B or Raspberry Pi 400 Ready with USB Boot?

Most of the latest Raspberry Pi 4 Model B comes with the latest USB bootable firmware. In case you have an older version of the Raspberry Pi 4 Model B board, or you are not sure, just check it using one of these methods:

Option 1: Do it from Raspberry Pi OS desktop with a monitor, keyboard, and mouse, going into the raspi_config, by leepspvideo:

Option 2: Format a blank microSD card (you need to back up the content in case you have only one microSD card) into FAT32, load the RPi4 EEPROM firmware using Raspberry Pi Imager(download from here). From Operating System -> Misc Utility Images -> Raspberry Pi 4 EEPROM boot recovery, choose your microSD card and load the image into it:
RPi Imager Utility a
RPi Imager Utility b

After the Raspberry Pi Imager loaded the EEPROM firmware into the microSD card, insert it into your Raspberry Pi 4 Model B’s microSD card slot and power it up. After just 3 seconds, the EEPROM is updated with new firmware and it is ready for USB boot.

Option 3: Boot it directly if your Raspberry Pi 4 Model B comes with the latest firmware in the EEPROM, nothing needed to be updated 🙂

MMR 2P5 MD 120 a

In any case, you can always reload the image/Operating System into this SSD using a USB to 2.5″ SATA Adapter or any compatible adapter. We recommend using the official imager: Raspberry Pi Imager. Please check this video out on how to use the Advance features:


  • Brand: MakerDisk
  • Form factor: 2.5″ SATA Solid State Drive
  • Pre-loaded with Raspberry Pi OS
  • Low power consumption
  • Low heat generation
  • High level of ability to endure shock, vibration, and high temperature
  • SMART TRIM support
  • Host Interface: SATA III
  • Capacity: 120GB
  • Performance:
    • Read: Up to 550MB/s
    • Write: Up to 460MB/s
  • Shock: 1500G/0.5ms
  • Operation temperature: 0°C-70°C
  • Up to 20X faster than a typical hard disk drive
  • Boosts burst write performance, making it ideal for typical computer workloads
  • Faster boot-up, shutdown, application load, and response for Raspberry Pi

Packing List:

  • 1 x 120GB 2.5-inch MakerDisk SATA III SSD with Raspberry Pi OS

MMR 2P5 MD 120 a


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