On 19/09/2018 12:27, NY wrote:
> I've just checked the voltage at the +5V and GND pins on the GPIO and
> *at the time of testing* I'm getting 5.1V, so definitely not below spec.
> It is interesting that with the drive in a different USB port (bottom
> left rather than bottom left, looking with the Ethernet port to the left
> of the USBs) the new drive hasn't bombed out yet.

It may well only be dropping when a certain pattern of activity is
occurring - high CPU load, disc being accessed, other peripherals
active, so you really need to check when stressing the system.

> But I think a powered hub might be useful - or else a HDD with its own
> power supply. I have one somewhere - but I can't think where that
> "somewhere" might be :-)

I would always recommend running a spinning disc from a separate power
supply. Small consumer spec SSDs are OK to power from the Pi.

---druck

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