3 ms·
As far as I know, the SoC supported higher SD card speeds all the way back to the first Pi and the original drivers even tried to use them. The trouble is, the
by makomk 7y ago
As far as I know, the SoC supported higher SD card speeds all the way back to the first Pi and the original drivers even tried to use them. The trouble is, the older Pis couldn't switch to the lower IO voltages required to actually operate at those speeds. Early adopters actually had to track down older, slower SD cards in order to use their Pis because otherwise SD card access would fail due to the driver erroneously switching speeds.
- gjsman-1000 7y agoYou're talking about the early problems using Class 10 cards which has been solved for a long time now. The Pi 4 upgrades the SD controller system (almost entirely) and is SD50 compliant, which means the SD card bus is roughly twice as fast as older models.