I flashed from TS240P003 to TRS251P002 (May 2014), hosts see VMFS 5.58 datastores after reboot.
This should be a final fix, more preferable than installing VAAI plug-in (every time in the future upgrades???).
HP Release notes: Beginning with TS251R004, HP MSA VAAI plug-in is no longer required. The HP MSA controller firmware now use T10 compliance in an ESX Environment.
