"druck"  wrote in message
news:pnu8uo$kt2$1@dont-email.me...
> 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.

Yes it's my own fault. I've seen it recommended not to power "greedy"
devices like spinning HDDs and even DVB-T adaptors from the Pi itself. I'll
get a powered hub.

It's been running for a good many hours now with a pen drive in place of the
spinning HDD, so it's not a generic USB port problem. I wonder where I put
my HDD that has its own power supply - those are usually a PITA but this
might be a case where it comes into its own ;-)

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