Chris Elvidge wrote:
> On 07/01/2019 13:24, NY wrote:
>> "Markus Robert Kessler" wrote:
>>> what should we use as main storage on a PI instead?
>>> Any more robust technique available, fitting in the SD slot?
>>
>> This is a very valid question. By all means use a USB HDD for main
>> storage, but you still need an SD card for OS boot, even if you mount
>> /tmp and maybe even /home/ onto the USB HDD instead of leaving
>> it on the SD card.
>
> The only thing you _need_ on the SD card is a VFAT partition that can be
> mounted at /boot - with all the files in the partition obviously. (2Gb
> is well enough.)

Nowadays Pis can boot from usb device without an sd card present. You might
need one for initial setup. See
https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md

Oh, it says there: only Pi3 or Pi2B v1.2.

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