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Beginners • Re: Booting from External SSD with USB and without NVME HAT

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I want to buy Raspberry Pi 5. I am a complete beginner. I don't want to use SDcard, but I want to boot with an external SSD without using HAT.

For example I want to use [Crucial ® X6 Portable SSD](https://www.crucial.com/products/ssd/x6-portable-ssd) which has speeds upto 800 MBps. Since Raspberry Pi 5 can support USB 3.0 port at full speed (i.e. it provides 5000 Mbps = 625 MBps). So, can I install Raspberry Pi OS on the external SSD (not on HAT) and boot the Raspberry Pi 5?

Yes.
So if I do as above can I run Raspberry Pi 5 without sdcard and without NVME SSD HAT?

Also yes.

But there are two major caveats:
  1. The combined total current draw of all bus powered USB devices must not exceed 1.6A/8W and that assumes the official PSU.
  2. If your chosen combinarion of Pi and PSU cannot negotiate (via USB PD) a 5v, 5A supply:
    1. The Pi 5 will pause during boot and ask you to confirm boot by pressing the power button
    2. Total available USB current will restricted to 600mA
    You can get around this by adding the following to the end of your config.txt but only do so if you have an adequate PSU.

    Code:

    [all]usb_max_current_enable=1

Statistics: Posted by thagrol — Thu Jan 04, 2024 1:05 am



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