I'm using IDE RAID 1+0 for a while. No more worries about failing harddrives. In this configuration data read transfer is 200% faster. Copying a 600MB file takes less than 10 second...
The SX6000 is only recommanded if you handle a lot of files. For increased performance it is $150 + $$$ for the cache memory. Without de extra memory you won't notice the difference.
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