When trying to summarize the SX6000's performance, the phrase "it's all relative" works quite nicely. On one hand, we can't help but be impressed with the SX6000's improved performance relative to the ST100 - we couldn't help but be somewhat worried prior to testing at the possibility of the SX6000 performing anywhere nearly as poor as the ST100. Thankfully, this didn't turn out to be the case.
Relative to competing controllers, however, the SX6000's scores don't compare quite so favorably. Scores in RAID 0, 1, and 01 are significantly lower than the Escalade and ATA RAID 2400A, particularly in the write tests where, for whatever reason, the SX6000 does very poorly.
RAID 5 is somewhat of a different story... Who'd of thought that the successor to the sickly ST100 would perform better overall in RAID 5 than the Escalade 7410? Not very many, we suspect. It can't match the performance of the ATA RAID 2400A, however, although it does offer the advantage of supporting up to 6 drives as opposed to the 2400A's limit of 4.
In the end, it's not out of the question to use the word "impressive" to describe the SX6000, despite the fact that its performance isn't record breaking. It certainly warrants consideration by those who are in the market for a high-end ATA RAID card - the ATA RAID 2400A is limited to 4 channels and is somewhat more expensive, and some may think twice about purchasing an Escalade given 3ware's disappointing exit from the ATA RAID market. But, it ends up being the buyer's decision, as always.