ETH profitability issue discovered

This morning, an error was discovered that affected ETH mining profitability. Some customers were overcredited.

We disabled ETH mining until we can determine the cause of the problem, and I assigned a ticket to Steven to investigate. Once he determines the cause of the problem, we'll figure out how to fix it and re-enable mining.

Chris will then correct the balances of a few customers. Our policy states that these customers will receive 15% above what they would have earned without the error, in exchange for the inconvenience. Payouts have temporarily halted for those few customers, but will be issued later today.

No money was actually lost and mining continues as normal for everyone.

The cause of the issue was identified as the ETH daemon having gotten out of sync again because of the failing disk adapter.

The adapter was replaced yesterday. Unfortunately, there isn't really a permanent fix to this issue, as it appears the mining server already has code to prevent mining while synchronizing, and we can't tell when hardware is failing intermittently.

Now that the disk issue has been resolved, ETH has to do one final resync, which we expect to be finished on Christmas. We'll fix the balances today and re-enable ETH mining then.