I used to be a big SCSI fan (my last machine had 4 Cheetah X15s in RAID0 on a cached Mylex controller.) From my own tests, two Raptor WD740 drives in RAID0 absolutely SMOKE two Cheetah X15 drives in RAID0~
~To be fair, the Raptors are, for all intents and purposes, SCSI drives with an SATA interface...
I don't know if this has been quoted for sarcasm, stupidity, ignorance or a combination of all of the above.
I don't know what tests were performed but there is no way in hell (I'm there right now thank you very much!) that a Raptor will "smoke" a 15k drive. Perhaps if the user was re doing their power connectors and reversed the planes. I guess that would smoke anything. Bwahahaha.
Mylex HBA's certainly aren't speed demons. This is the chief reason for LSi scrapping them after acquiring the line from IBM. The AR600 was the exception, however this strange beast appeared shortly on the market in the USSR and some were imported in the States. These had blistering performance utilising up to 80% of the available bandwidth at 133MHz! Too bad it was impossible to get larger SODIMM modules that would work and batteries weren't readily available. The real deal breaker on the AR600 was its non friendly copings with disk imaging software and total lack of support for Win32/64 2003 Server.
The ER2K was a contemptible DB server performer when properly configured by a qualified person. Improperly configured, these controllers were a train wreck.
LSi HBA's OTOH, are pretty hard to misconfigure although there are a slew of options to "play" with that have direct impacts on users' performance. The newer ones using X-scale based XOR and cache accelerators absolutely rip anything out there to shreds. (well within their price range of course)
On the DESKTOP, the Raptor will beat a first and possibly second genny 15k disk connected to a DUMB HBA just on the basis of firmware optimisations by WD. If Raptors were true "Enterprise Class" drives, their multi-user performance would be much better than currently and the desktop performance lower just like it is in 10K SCSI land. Of course the target for this product is the enthusiast not the NAS professional whose primary concern is availability and cost is not particularly of concern.
Cheers!