arduino UNO + ethernet shield REV3 problem

I have a logger working that puts data in a mysql database via a GET-command on a webserver (on the internet). It runs no for more than a month without any problem.

When I put a sd-card in the slot on the ethernet shield, after about a minute, the program stops working. It is an empty FAT-formatted SD-card, and not used for the moment. But I like to use it in the near future.

Anyone has an advice to solve this problem? A live demo of some logs on


Try disabling the SD SPI as a test.

void setup() {

  // disable SD SPI

  // now set up ethernet

  // rest of your setup stuff

If that works, then here is the setup to use both the w5100 and SD together.,125359.msg943368.html#msg943368