The only elements in {HEAD ~ the FC SAN} which require {TAIL ~ modification} to support the FAST protocol are the FAST IOC and FAST switch 
require
The only elements in { HEAD ~ the FC SAN } which require { TAIL ~ modification } to support the FAST protocol are the FAST IOC and FAST switch
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH