After replacing a hard drive in MyCloudEX2Ultra, 4TB Raid 1 mode, it took about a day for Auto-Rebuild. After that the system reports that both disks are Ok and the Raid is healthy. Nevertheless, when login on the drive (Storage->RAID), it shows:
3.93 TB Rebuilding (Drive1), 3%, 59152 min
There is no sign that the SAN is not working properly, just that I would like to understand better how it works. Is it normal rebuilding of a 4 TB hard drive to take 40 days?
I’ll appreciate any comments or links which can shed some light on the subject.