Including your question here might gain a better response, but I'll try to give an answer.
Question (summarized): You have a chassis of blades and you want 30TB shared storage for hosting web servers.
Blade servers alone are meant more for compute, the internal drives are mostly for a mirror to hold the OS (ESXi, etc) on each blade, not for the production storage workload - Of course it depends what you're doing. To host virtualized web servers and do live migration, etc, shared storage is probably the way to go.
Do you have the HPE 20/40 F8 FlexFabric cards in your chassis? If so, you could take advantage of the FCoE and accelerated iSCSI:
To serve the storage, build a server with the appropriate compatible hardware and software. Or, for a prod (money-making) workload, preferably go for a commercial solution with maintenance and support.
Edit: You could also use VMware vSAN if all your blades together have enough storage, but this can be dangerous unless you understand exactly what's happening.