Dell PowerEdge R720xd + PERC H710P: how to expand existing RAID6?

Question

RAID

Dell PowerEdge R720xd + PERC H710P, RAID6 of 9 identical disks is assembled on it. Installed in the server one more such disk. How to add it to the raid? The server is running Proxmox 5.2 (Debian 9) - there is no OMSA for it. Only the controller BIOS is available. The disk is visible, but the Expand VD size option is not available.

Answer 1

and so? https://www.dell.com/community/PowerEdge-HDD-SCSI-...
and the same disk is the same only in size and speed or identical to those already installed (size, speed, firmware , manufacturer , etc )?
and you also have a controller in the background initialisation status. did you create an array recently? maybe it's worth waiting until BGI is over...