hi blissz, you asked for feedback and tips.
a good start for autotune is a 'lastgood' variable, containing after every tune the last working level of mh/s each chain. So you could set the new starting value after reboot to 'lastgood' - 18 as example...
How it works now: It does goes up in speed and remembers the frequencies that gave little to no HW errors. After it found a maximum (3 times consequently too many HW errors) it steps back a few steps and then a slower algorithm kicks in and checks each chain for HW errors. If the HW errors are above 6 in 5 minutes it will step back one frequency (in the list of good frequencies)
Any suggestions are appreciated.
some people say, change freq must be only once at 10 minutes.
bitmaintech recommend wait 20 minutes for testing before send blade for repair.
Else, my bad experiments show it, your D3's blades will may be ruined after some time (many HW for short time, always).
ps: they will be self-healed, may be, after resetting to factory settings and one-two day waiting (with worked device). but may be not. my D3 is healed, this way. but few HW still present anyway after this.