I would guess pool problem-- are you able to see what pools are being used during those rejects? .. I don't know how miningrigrentals works -- i don't know if they act as a pool front or if the user provides pool information.
i can set the pool...it´s only passthrough if no one rent this rig
and u use 2miners and also tried miningpoolhub
but why so many HW errors...my z9 mini´s dont have any HW shown after days
could it be, that the chain auto speed is to high
I think it is just part of how they are doing their ASICs here -- a HW error does not necessarily mean a fatal error. I will say that the higher you push a board, the more likely errors will occur. The key though is the hash rate (and ultimately share submission rate).
The DR5 and others throw lots of HW errors, but still hash/submit just fine. I personally use flypool and antpool (sigh) without issues on my Z units. Try it on another pool and see if you don't get the rejects... I will eventually release a firmware that will let you control the frequencies yourself, but until then that is the only suggest I personally have.
At this point in time, I think ignoring HW errors is ok -- when they occur, there are no errors in the system log that I've seen that would indicate an actual problem with the hashes, at least the ones I have looked at so far.
-j
