My problem: I can see all 3 disks in Storage->Disks sda - system, sdb & sdc - storage.
I managed to create sdb1 without any problem. Than later on i added sdc disk and when i go to Storage->filesystem->create for sdc1 during the process i get few errors:
"Failed to read file '/tmp/bgstatuslVLC9a' (size=0)."
"Failed to read file '/tmp/bgstatusfiIhYK' (size=0)."
when i select ok on both in popup i get finally:
"The file system creation has completed successfully."
When i select finish, new partition dissapear.
I am runnin OMV v 4.1.3-1 ( Arrakis)