Hello All,
I want to offload power strain from my RPI4 as I plan to connect 2 portable USB3 HDDs (4T each) to it. I've found that one drive is OK to connect directly to the RPI4, but a second stresses the power delivery too much, esp. during spin-up.
So I bought this USB3 powered hub with 5V/3A AC adapter.
https://www.amazon.com/gp/product/B083XTKV8V
Now there is the following strange observation that impact proper operation of the setup.
With power off, I connect the USB hub to the RPI. No disk is connected to the hub at this time. The hub is powered up.
When I now power up the RPI it does not boot. (only red LED, no flickering green LED).
Next again all is unpowered and the USB hub is disconnected from the RPI. Now I power up the RPI. It boots fine, of course. I now plug the USB cable from the hub (which is powered) into the RPI. The dmesg says that a USB hub has been detected. Otherwise the RPI is operating fine. I connect the two disks to the hub. They power up fine and get mounted to the RPI (I have respective entries in the fstab)
In the end I have the desired configuration of RPI, hub, 2 disks operational. (Seems to be stable). But it is not the expected simple power up procedure with all pieces connected.
What's going on? Is there something that I need to configure to let the RPI boot while the hub is already connected at power up?
This is the RPI OS (yes it is not latest bookworm. Let's say I ignore that fact):
$ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"
Any debug ideas?
Thanks,
Gert
I want to offload power strain from my RPI4 as I plan to connect 2 portable USB3 HDDs (4T each) to it. I've found that one drive is OK to connect directly to the RPI4, but a second stresses the power delivery too much, esp. during spin-up.
So I bought this USB3 powered hub with 5V/3A AC adapter.
https://www.amazon.com/gp/product/B083XTKV8V
Now there is the following strange observation that impact proper operation of the setup.
With power off, I connect the USB hub to the RPI. No disk is connected to the hub at this time. The hub is powered up.
When I now power up the RPI it does not boot. (only red LED, no flickering green LED).
Next again all is unpowered and the USB hub is disconnected from the RPI. Now I power up the RPI. It boots fine, of course. I now plug the USB cable from the hub (which is powered) into the RPI. The dmesg says that a USB hub has been detected. Otherwise the RPI is operating fine. I connect the two disks to the hub. They power up fine and get mounted to the RPI (I have respective entries in the fstab)
In the end I have the desired configuration of RPI, hub, 2 disks operational. (Seems to be stable). But it is not the expected simple power up procedure with all pieces connected.
What's going on? Is there something that I need to configure to let the RPI boot while the hub is already connected at power up?
This is the RPI OS (yes it is not latest bookworm. Let's say I ignore that fact):
$ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"
Any debug ideas?
Thanks,
Gert
Statistics: Posted by Gert — Sun Jan 21, 2024 8:17 am