USB 3.0 to SATA III 6Gbps 2.5-inch SSD Adapter

Just in case you didn't follow the news, USB Boot firmware for Raspberry Pi 4 Model B is now officially being released as a stable version. Check out this video by Jeff Geerling talking about the stable release of this firmware:

We, at Cytron Technologies, are pretty excited with the stable release of USB boot firmware and are getting reliable and affordable tools needed to enable the USB boot. This is a USB 3.0 to SATA III Adapter with cable, suitable for 2.5" SATA SSD or HDD. We have tried it on Phidisk PhantomKnight ^II SATA III (6.0 Gbps) 120GB SSD. Install the Raspberry Pi OS and boot it from USB3.0 port on Raspberry Pi 4 Model B.

It boots up without a problem and it is faster than booting from the microSD card. Here is the diagnostic result that we get using Raspberry Pi Diagnostics: (SSD is connected to Raspberry Pi through this adapter to USB3.0 port)

• Sequential write speed 117237 KB/sec (target 10000) - PASS, nearly 11 times faster than the target
• Random write speed 14209 IOPS (target 500) - PASS, nearly 30 times faster than the target
• Random read speed 13967 IOPS (target 1500) - PASS, nearly 9 times faster than the target

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.

Of course, the Raspberry Pi 4 Model B must be configured to be able to boot from USB. Not sure your Raspberry Pi 4B is ready for USB boot? Check these steps out:

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

After the Raspberry Pi Imager loaded the EEPROM firmware into the microSD card, insert it into your Raspberry Pi 4B 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 4B comes with the latest firmware in the EEPROM, nothing needed to be updated :)

• Brand: UGREEN
• USB 3.0 to 2.5" SATA III SSD or HDD Adapter
• USB 3.0 A Male
• Interface; SATA III with the speed up to 6Gbps
• Compliant to SATA III/II standard
• No extra power is needed, just one USB3.0 is needed
• Support 2.5 inch SATA SSD or HDD, we have tested it with Phidisk 120GB 2.5" SSD with Raspberry Pi 4B
• Support UASP transport protocol, greatly accelerating read and write speed of SSD
• Do not support CD-ROM
• Support Windows XP/7/8/Vista/10. Mac OS and Raspberry Pi OS
• Cable length: 30cm
• Dimensions; L50xW43xH13mm

• 1 x USB 3.0 to SATA III 6Gbps 2.5-inch SSD Adapter