Useful link about VMFS 5

http://blogs.vmware.com/vsphere/2011/07/new-vsphere-50-storage-features-part-1-vmfs-5.html
http://blogs.vmware.com/vsphere/2011/07/new-vsphere-50-storage-features-part-2-storage-vmotion.html
http://blogs.vmware.com/vsphere/2011/07/new-enhanced-vsphere-50-storage-features-part-3-vaai.html
http://blogs.vmware.com/vsphere/2011/07/vsphere-50-storage-features-part-5-storage-drs-initial-placement.html
http://blogs.vmware.com/vsphere/2011/07/vsphere-50-storage-features-part-6-storage-drs-balance-on-space-usage.html