UPDATED 29/06/2017
External Hdd 3.0 /7200 RPM/8Tb
CPU Plot XPlotter 1.0
i7 with 8 threads and 16 of RAM - ~10K nonces/min
tested for 6 hours
Hdd Write average of 10MB/s
one week to finish
Plot not tested yet
Xeon server with 8 threads and 16 RAM - ~10K nonces/min
usb 2.0
Windows server 2016
os do not show write speed
tested for 6 hours
Plot not tested yet
GPU Plot gpuPlotGenerator 4.0.3 (4.1.1 do not work, [ERROR] Unable to extend output file: 112)
Nvidia 1070 X /8G - ~20K nonces/min (~96 hours to finish)
Hdd Write average of 80MB/s with peaks of 100 and low of 60
4 days to finish full tested
FAIL!!!! Corrupt Plot
Conclusion, although the GPU plot is 2x faster did not guarantee plot integrity.