Hello A!
Wednesday January 09 2019 08:12, you wrote to Fred Smith:
> Fred Smith wrote:
>> On 2019-01-08, A Dumas wrote:
>>> Simply get any 2.5" portable disk. It won't need external power.
>>> Make sure you use the official RPi power adapter for the Pi,
>>> though.
>>
>> Even then I'd be using an externally, separately powered disk. The
>> pi simply does not have the grunt to run "any 2.5" portable disk"
>> reliably. You are asking for all sorts of obscure problems that
>> will ruin your day.
> All modern 2.5" portable disks say they require no external power,
> that means they adhere to the common denominator usb2 standard of 5 V
> and max. 500 mA. The Pi does too, it can even go to 1 A with the right
> setting in /boot/config.txt. So, any 2.5" portable disk will do. I
> have 3 different ones and they all work fine without the 1 A setting.
> ... There *might* be 2.5" disks who draw more than 1 A peak current at
> startup. Those are almost certainly not disks you can buy in the shops
> today.
I have decided touse a laptop ps that gives 19v at 3.43w and hopefully can
even use it to
power the Pi as well - have to look when the kit arrives from Singapore in 10
- 20 days.
The drive is one of a few spare 1 Tb among many others so I do wish to make
use of one or
more and not use a USB external which I use for back ups only.
Vince
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