Specifying the Correct Replacement Drive for a Mirror

I want to verify that I’ve identified the correct replacement drive for my mirror unit.

It appears that I have a defective drive on my Mirror Unit, a red light on the unit and the dashboard says that the second drive is degraded.

I pulled the drive and I believe the correct ID for the drive is WD20EFRX
I searched on the WD site using this ID and found a RED NAS Drive. I’m assuming this is the correct replacement drive but wondered why its designated as RED, while my failed drive is a WHITE.

Have I identified the correct replacement drive.

Thanks.

It is being quite confusing. Can you please elabarate the issue which drive bay is showing red light and which drive bay is showing white light on the enclosure?

Thx for responding but I only wanted to verify that I had identified the correct replacement drive. I wasn’t attempting to troubleshoot the problem.