@PaulS: whole array: hmm.. may by my architecture is wrong: I do a external eeprom dump from a attached nano over serial to the MEGA. this will take me up to 1KB of data. buffing this amount of data is hard with MEGA. right?
@Nick: client.write() will write over SPI, no? I was not looking into #include <SPI.h> #include <Ethernet.h>. But one may find out, the SPI will go this way.
Does anyone know how fast the SPI port communication speed. I was once (a long time ago) reading 10Mhz.