There are so many other factors that could effect your situation, such as the overall health of the system, the reason(s) why the drive was disabled in the first place, etc, etc.
If you don't feel competent to make the decision on your own after examining the diagnostics for issues, I suggest attaching the complete diagnostics zip file to your next post in this thread.
Unraid disables a disk when a write to it fails. that means SOMETHING went wrong, and if the disk is perfectly healthy, simply rebuilding isn't going to fix that. Preclear may reveal issues with the disk, if it does, you need to use a different disk. If preclear DOESN'T find anything wrong, then whatever happened to cause the failed write is probably still lurking, waiting to cause issues with the rebuild.
Either way, you need more information before you can make the correct decision.