I have a 10 port USB 3.0 hub (ICY BOX IB-AC6110) with external power supply. I use this hub to flash a Raspberry Pi image to 10 or less cards at once using Etcher. Etcher indicates that flashing is succesfull. But, only one SD card actually works; when I put this card in a Pi, the Pi boots. With all the other cards, the Pi won’t boot. Nothing happens, I don’t get the Pi logo and the activity led stays off (it’s only blinking a couple of times in the beginning, after that it’s dead). This behaviour happens with Etcher on Windows 10 Business 20H2. When I try the same on Ubuntu, all cards actually work.
I’ve compared the files (that is, the bytes) on a “good” and a “bad” card, they are identical. I also compared the MBR of the cards, they are the same except for the identifier.
It looks to me that the problem is with Windows, but I have no idea where to look further. And since our company uses Windows, it has to work with Windows.
Anyone an idea?