Hi,
I am running ESXi 6.5.0 build 5310538 with Xpenology DS3615xs DSM 6.1.5-15254, Jun 1.02b loader. I have two pass through RAID cards and currently using only 1 to connect 8 hdds (7x6TB + 1x8TB, all WD RED). When I added the 9th drive (6TB WE RED) on the second RAID, I got the error "Operation failed because errors occurred with the file system" when I tried to expand the volume under the "RAID Group" tab in Storage Manager. It seems that the system has limited the volume to 8 hdds even though the NAS can support up to 12. Is this normal? Or am I missing something in my configuration setup?
p.s. I could create a new RAID Group using the 9th drive so it seems that the drive hardware was not the issue.