On Mon, Feb 22, 2021 at 09:47:07PM +1030, Jonathan Woithe wrote: > On Mon, Feb 22, 2021 at 11:24:18AM +0100, Oliver Neukum wrote: > > It is possible that the other machine can just supply more power. > > On the machine with the ASMedia controller (where the problem occurs), the > 500 GB SSD works perfectly well when connected to USB2 sockets. If a USB2 > socket can supply sufficient power, wouldn't a USB3 port be more than > capable? > > The specifications for both the 250 GB (working) and 500 GB (not working) > are 5V at 0.8A. I'm guessing this is a worst-case scenario. In any case, > this is well within the capabilities of a USB3 port. If there was a power > issue with one of these drives it's surprising it's not seen in both - > unless the 250 GB is just under the critical power threshold and the 500 GB > is just above it. Is there an easy way to tell if this is indeed the case? Another datapoint: on the system with the ASMedia controller where the 250 GB T5 SSD works but the 500 GB T5 SSD does not, the same USB3 socket is able to power a traditional 2.5" spinning rust hard drive without any obvious problems. Regards jonathan
