Can an HFS+ formatted drive be shared with Windows
Attached to an OS X Server you can use the RAID-volume formatted to HFS+ or ExFAT to create shares for Windows clients.

After enabling the share it is accessible via AFP and SMB by default: 

Example screenshot OS X Server 3.2.2 Mavericks:



Example screenshot OS X Server 5.0.15 El Capitan HFS+:



Example screenshot OS X Server 5.0.15 El Capitan ExFAT:



Both shares are accessible as usual (Data:HFS+ formatted/data2: ExFAT formatted):