Just a quick note: 2x X25-Es in raid 0 was the same performance as 1 for me in all apps. Just in general raid 0 gives little benefit to performance (read the raid sticky if you want to find out why) and in this case it shows even more because single drives are already so fast. I only got two because I needed 64GB of space. If you are fine with 32GB then save your money and get just one; performance is the same.
Another quick note, besides the cache, the adaptec 5405 I have actually SLOWS DOWN the drives versus onboard. You will be perfectly fine with onboard. In fact, I am selling my 5405 and moving to onboard because it is faster in most things and I dont have to deal with 45sec being added to my boot time due to the controller.
Also overall real world write performance degrades about 20% after a lot of use. The only way to get it back is to format the drive. I reformat my array after every month; I have a system set up now that takes an image of my boot array and writes it to one of my storage HDDs then I wipe then I stick the image onto the array again; takes 1.5h-2h overall to do a "refresh".
Sorry for the off topic...







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