Nп/п : 78 из 100
От : Vincent Coen 2:250/1 13 июн 26 00:41:06
К : NY 13 июн 26 03:08:02
Тема : crazy problem with pi4 and ssd
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Hello NY!
12 Jun 26 20:58, you wrote to all:
> On 31/05/2026 23:57, Pancho wrote:
>> My rpi4 UBS 3 sockets failed, I suspect due to feeding power back
>> into the port from a powered SATA to USB connector.
> I use a Pi for a PVR, recording TV programmes to a spinning USB HDD
> that is connected to a powered USB hub (so the HDD is not being
> powered by the Pi`s USB).
> When I used a Pi3, this worked perfectly. When I switched to using a
> Pi4, with the same HDD and hub, the Pi consistently hung very early in
> the boot process. As soon as I unplugged the hub from the Pi (or
> removed the hub`s PSU) the Pi continued the boot process. (*)
> It was a problem mainly if there had been a power cut and the power to
> both the Pi and the hub was turned on at the same time (when the
> power came back).
> Someone suggested back-powering might be the cause, so I made up a
> special cable which had its +5V line cut and connected it between the
> Pi and the hub. Sadly this made no difference.
> Powering the HDD from the Pi`s power, via USB, worked fine - but I was
> uneasy about drawing so much current from the Pi`s PSU in case the
> voltage ever sagged to the point that the Pi started to misbehave.
> I solved the problem by changing to use a SATA HDD in a caddy that had
> a powered SATA-USB interface.
> So the Pi4 seems to be more sensitive to powered devices than the Pi3.
> I`m not sure about the Pi5 as I`ve only used USB-powered SD cards as
> slave drives.
> All of this is talking about an HDD that is used as a data disk. I
> still boot off an SD card plugged into the Pi`s motherboard, in the
> standard way.
> (*) I forget how far the boot got before it hung. It might have been
> before there was *any* image on a monitor connected to the HDMI port,
> which isn`t a great deal of help...
I have a pi3 and had a 4 and for both use a secondary Power adaptor where for
the 4 bought a laptop adaptor with the correct power outputs.
The 3 uses a HDD and the 4 used a SSD but the adaptor for it will power a HDD.
Basically the supplied power adaptors for these units is does not have enough
grunt for the power requirements i.e., amps etc.
Vincent
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