Once again, the controller makes our Burst and Maximum numbers mainly for show since only the first couple of hundred megabytes are at those speeds due to the cache. The action in the Minimum and Average shows that the drives scale very well, but run right around 20MB/s slower than their read speeds. The drives are advertised as such, so it didn't come as a surprise; many of the Solid-State Drives are this way, some are worse than others and I have seen much worse when researching the technology.
When running RAID 0, you can count on around 80 MB/s for each Samsung SATA-II drive used in the array.
RAID 5 takes a little more of a performance hit in the write cycle, but those familiar with RAID 5 know this is common.