I have single-parity a server that has had two simultaneous drive 'failures', only one of which has actually failed. One drive was redballed due to a SATA cable momentarily coming unplugged, and the other has actually had a hardware failure. The drive that is still good mounts fine, passes all SMART tests, I can access and recover the files, etc., but Unraid will not let me add it back into the array so I can rebuild the failed drive.
Is there any way to force Unraid to re-enable the working disk without a rebuild, or replace it with a clone so I can attempt to rebuild the other drive? Or perhaps make a new config, tell Unraid that parity is correct, and rebuild the failed drive that way? I am well aware that having two simultaneous drive failures with single parity probably means the data is unrecoverable, but if I start a new config and rebuild parity it will certainly be lost forever. I am looking for a hail mary at this point. Even a solution that results in partial data loss I would still consider a success if it avoids losing all data on the broken drive.