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SMART error (ErrorCount) detected on host - but the NVRAM disk is perfectly fine

Recently I got a new system with a NVRAM disk (nice and fast). Upon installing smartmontools, it started reporting that the error counter for the disk is increasing. For a brand new disk?

Replace and re-add a failed drive to a Linux software RAID

Most of my systems run on a software RAID 1 configuration (that is, two disks, where each disk is mirrored to the other). This way, one of the disks can fail and still all the data is available.

If a disk failure happens, the disk is replaced with a similar disk, and then needs to be configured and re-added to the RAID.