3 ms·
sd card access doesn't go trougth the USB controller in any of the rpi models. You are confusing it with the Ethernet port which is connected trougth USB.
by jpablo 8y ago
sd card access doesn't go trougth the USB controller in any of the rpi models. You are confusing it with the Ethernet port which is connected trougth USB.
- jsight 8y agoDoes it matter? In practice, it doesn't seem like the sd card is ever faster than the Pi USB bus.
- jng 8y agoI seem to recall the USB bus on the RPi3 is limited to 480Mb/s, the fastest SD cards in the market are around 150MB/s, and the SDcard port on the RPi3 is below 25Mb/s.
- jsight 8y agoYes, that makes sense. The SDCard port on the pi seems to be slower than the USB bus. I will say that I think your estimate for the USB bus on the pi is probably too high. In practice, I don't think it can do more than 250 or so.