Re: Interconeccion between P2000 G3 SAS and Proliant DL380 GEN 10

P408e-pSR Gen10 SAS Controller are compatible with Proliant DL380 gen10, no doubt.  MSA 4^th generation (1040/2040) does support Gen10 server hardware.

However, The SAS HBAs that are tested and compatible that can be configured with StorageWorks P2000 G3 MSA SAS Controller with the latest firmware TS252P001, works with Proliant Gen9 Server Hardware only.

The most common once are H221 Host Bus Adapter or H241 Smart Host Bus Adapter, and these SAS HBAs are supported with Proliant Gen9 Server Hardware.

For your understanding, I have included links for both HBAs that lists supported ProLiant Servers.

https://h20195.www2.hpe.com/v2/GetPDF.aspx/c04111475.pdf - refer page 3

https://h20195.www2.hpe.com/v2/getdocument.aspx?docname=c04346305 - refer page 3

Compatibility must be confirmed at http://www.hp.com/storage/spock

Below includes a list of supported operating systems ( not to be missed) 

Image may be NSFW.
Clik here to view.Included_list_of_Supported_OS

Hope this explains well.