Hellon nzsystem,   We have not validated Proxmox but I believe you can get the results you want by converting to non-RAID.   Try Converting Physical Disk To Non-RAID For PERC H310 Page 43 : [URL]   If that does not work then you may need to get an HBA.  
Hi. Just got a refurbished T620 with an H310 RAID adapter and having some issues with XFS under Proxmox. Basically, Proxmox detects a RAID configuration, which is bad... Should i just install this 6Gbps SAS HBA Firmware Package at this point? Thanks.
T620 H310 and Proxmox