sidezero

I recently replaced one of my old 6TB drives that was showing a few errors with a 14TB drive and during the data rebuild a second drive started throwing millions of errors. After the rebuild I shut everything down to check connections but now the second failed drive cannot be read at all. I have a few questions about the current state of my data after this experience. 1) Is the data on the first drive rebuilt still considered good based on the bit state across all of my other drives other than the one that failed during the rebuild? 2) Is there any way to get back my data on the second failed drive? I assume the answer here is no and it's lost without a second parity drive in place. 3) If the answer to #2 is no, would my next steps be to replace the failed drive without a data rebuild somehow, and then rebuild parity data from there once everything is stable once again?