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I’ve never attempted to use two cameras on the Edison and after doing some research I also found a couple links that describe you need to reduce the camera’s resources.
What steps have you done to see the No space left on device message? How are you connecting the cameras to the Edison? Are both cameras recognized with dmesg?
The sources from the latest release can be found here https://software.intel.com/en-us/iot/hardware/edison/downloads