I know how the parity drive works see:

I know the parity drive must be larger than others (or even the same size). So now for example I have four drives three and one for parity. (the size doesn't matter for now) now one drive fails. I change the failed drive and replace it with a new one. Now how does the Unraid system rebuild the failed drive? Is there any command how to start it?

 

Thanks

 

 

Assign the replacement drive to the failed drive's slot, check the box saying you want to rebuild, start the array.

2 hours ago, jonathanm said:

Assign the replacement drive to the failed drive's slot, check the box saying you want to rebuild, start the array.

Then once rebuild completes run a check WITHOUT writing corrections to parity drive to make sure the drive rebuilt correctly.

Thanks