This is a hardware issue. It would surprise me if you went back to Sierra and saw different behavior, but it might help point to the cause (and a p...

Are these internal disks, or are they on a third party SATA card? These are disks that are internal to the chassis. I have 3 4TB disks in the ap...

This seems like a hardware issue. What is your hardware configuration? What enclosures are you using? SoftRAID should work the same for replacing d...

maybe I was special, but my raid 5 volume on my mac pro didn't have that issue when I upgraded to High Sierra. Never had a kernel panic nor a failed ...

Correct. It is relatively simple to let a user replace drives with larger ones, then enable them to expand the volume when all are replaced with large...

This is already supported. ;-) So adding another drive is NOT supported but replacing drives one at a time is?

You are correct to notice this. We will have to fix this user comment. We are considering allowing the expansion of volumes this way, but it is a c...