If you have a LSI they have a web-based control interface
I did install the software on top of Proxmox 2
What type you have ? Check there website.
My card and support:
You need 3DM2 CLI Linux Or 3DM2 CLI Windows software.
Check there site: Here my card as a example
http://www.lsi.com/products/storagecomponents/Pages/3ware9650SE-4LPML.aspx
Do megacli dont support webgui ? 3DM2 is a webgui. Don't know if you can use that ? If you can program html you can integrate it
in you Proxmox gui ?