Jan Panteltje  wrote:
>
> My old 1TB Seagate USB has its own wall-wart marked as 12V 2A,
> makes 24 W.
> My new small 'Platinum' 1TB USB disk needs 2 USB ports for power,
> USB is rated at < 600 mA, so estimate 1A at 5 V is 5 W.
> The Seagate spins down after a while not use.
> Not sure about the other one,
> use it on the TV for movies mainly.
> The Seagate has all the raspi backups,
> maybe using USB drives with external supply is safer with raspi.

It's understood that "normal" USB hard drives can't be powered
directly from the Pi and require a separate power supply. I just
started wondering if anybody is making ultra low power mechanical
drives that _could_ be powered directly from the Pi's USB port.

A 2.5" drive that drew little enough power to be driven from the
Pi might be a viable alternative to flash storage. Is there such
a beast? 64G or 128GB would be large enough, 32 GB is  slightly
too small.

Thanks for reading!

bob prohaska

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