boot usb raspberry 3

[bluedark]

Hello,
I can't boot my raspberry 3 on a hard drive on usb. I tried with 4 different hard drives.
However, with my usb keys, it works well. For information, I don't insert any card sd.
Can you help me?
Thank you in advance!

[bluedark]

anyone to help me?
Thanks!

[DirkS]

Not all HDDs are compatible.
So either your HDD is not compatible or you did not set it up correctly.
Without any more details about your setup it's not possible to say more

What type of HDD exactly did you try? How are they powered?

[bluedark]

They are self-powered USB hard drives (they haven't power supply)
Thanks

[fruitoftheloom]

They are self-powered USB hard drives (they haven't power supply)
Thanks

The Raspberry Pi 3B has a total of 1200mA shared between the 4 USB Ports.

Some USB powered drives exceed that limit on spin up, without knowing the specifications of the mystery hard drives, one is just guessing !

[bluedark]

Here are the results obtained according to the tested material:

usb key that works: corsair 8Go

usb key that doesn't work: maxell 16GB

usb disk that doesn't work :
- transcends ts2tsl25h3p (900mA)
- transcends ts1tsj25a3k (1A)
- transcends ts1tsj25a2k (1A)
- toshiba hdtb120ek3ca (1A)

ssd usb disk that worked only once: samsung ssd t3 250GB mu-pt250b (700mA)

There may be a problem with amperage.
But should it pass on a raspberry 3?

Thank you in advance.

[bluedark]

I'm only working on my ssd usb with its 700mA.
In fact, it's still the same problem, it starts well a first time, I can work on it without problem but impossible to restart it after a reboot or a stop ... I have to put raspbian on the ssd to restart the raspberry
Has anyone come across this problem before???
Thank you!