This page displays the World Wide Port Names bound to each Fibre Channel host bus adapter (HBA) in the system. You can also view the persistent binding status for each HBA. With persistent bindings, ESX Server assigns specific target IDs to specific SCSI devices. This target ID association is retained from reboot to reboot unless changed by you.
Persistent bindings are particularly useful if you are using raw disks with ESX Server. A raw disk is directly mapped to a physical disk drive on your storage area network (SAN). ESX Server directly accesses the data on this disk as a raw device (and not as a file on a VMFS volume).
For more options regarding persistent bindings, see www.vmware.com/support/esx2/ doc/esx20admin_pbind_disks.html.