I recently plugged in portable hard drive to my VIM3 and it didn’t work as the hard drive was making worrying noise. I put a usb current/voltage meter between the drive and the USB port and it shows the USB port gives out only 4.49V. Not sure if this is normal for a SBC but I believe this under voltage is the raison my portable hard drive didn’t work.
PS. this voltage was enough to drive my NVME to USB adapter though.
I’m in usb3.0 mode. I think maybe the problem only shows up on external hard drive since my SSD works fine (first picture, SSD working with 4.49V 0.42A). Maybe hard drive needs higher power to startup? The noise I heard sounds like spinning disk.
@Electr1 My power adapter is 5V3A capable. The solution I’m using now is to use a powered usb hub.
I’m always wondering if the power adapter can output multiple voltages, which voltage will actually be used?
Mine is 5V3A, 9V2A and 12V1.5A, why doesn’t it give out 12V? With max 1.5A, the maximum power is greater than 5V3A.
Yes, at powerup peripherals consume a lot of power, It is better to use those kind of peripherals with external power like a USB hub, please note that Laptops and PCs use much powerful power supplies…
One more thing, I see you are using a M.2 SSD, M.2 SSD can consume almost 7w nominal, in that case 24w power supply is highly recommended, I see you are using Macbook Hub, those connect to 2 USB ports, that gives it much higher power limit…
sorry I made a typo…
I mean I was not concerned with the problem since I have a working solution
Other usb drives… my thumb drives works fine, usb camera also OK.
@Vladimir.v.v I tried the same cable with ssd and hdd, hdd didn’t work while ssd works.
@Electr1 yeap, I think the lesson here is that SBCs tend to have a weaker power output capacity so it’s always a good idea to use a powered usb hub. And BTW, that Macbook usb hub is actually two separable usb hubs, one connects to their own usb c port on the Mac.