Replace and rebuild

I ran out of space on My Cloud Mirror wir 4T Raid 1.
I purchased 2 new WD Red 4T Drives to replace what I have.
I changed the #2 drive with a the new 4T and MDMyCloudMirror says that Volume-1 is rebuilding.
However below it shows “Rebuilding(Drive2), 0%, 31636 mins” at least an hour into it.

What have I done wrong?

Any feedback?

Thanks

Hi sg56,

I would suggest to complete the rebuild process. Rebuild process may take up to some hours to complete. Do not power off the unit and do not connect the unit to a computer system during this time. Once the rebuild is complete, the front LED Indicators will come to solid LED response.

Thanks for the response.

It all worked out.

Regards