MSA 2000 G3 Data stores are missing from ESXi host after reinstalling esxi 5.5

 After reinstalling esxi5.5 HP custom image “VMware-ESXi-5.5.0-Update2-2068190-HP-5.77.3-Nov2014” Everything was working fine except the HP MSA 2000 G3 FC Datastores. All the LUNs where listed on the Devices but no Datastore was detected. 

As I SSH to the host and list the volumes I received the following:

/vmfs/volumes # ls

 ls: ./530863b0-63cea050-c059-ac162d6fe2a8: Function not implemented

After googling for so many hours; the problem was SOLVED:

• Go vCenter, select the problematic host
• Click Configuration tab
• Under Software click Advanced Settings
• Select VMFS3 Changer the value of VMFS3.HardwareAcceleratedLocking from 1 to 0
• Rescan the datastores