Further, you can’t repair a pool with a drive marked with a warning label.

“Only drives with a healthy status can be used to repair or expand a storage pool,” Synology’s spokesperson said. “Users will need to first suppress the warning or disable WDDA to continue.”

That sounds pretty terrible. I’ve had great luck with seagate and I think I even have a seagate drive. My Drives are all 6+ years old, except for 2 which are a bit newer and I have some drives I bough second hand super cheap. They may be 2 ish years old as well.