To maximize response time and avoid a write penalty, {HEAD ~ small write operations} are mapped into {TAIL ~ RAID 1 configurations}, and medium and large write operations are mapped into RAID 3 configurations 
are mapped into
To maximize response time and avoid a write penalty , { HEAD ~ small write operations } are mapped into { TAIL ~ RAID 1 configurations } , and medium and large write operations are mapped into RAID 3 configurations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH