A few years ago I noticed on Western Digital's web site that their enterprise hard drives stated that they were not recommended for desktop computers. I cannot remember if I read, or whether I just presumed, that it was due to the way that the caches were optimised for the different types of data access that occurs on a server compared to a desktop computer. When Apple announced the Time Machine, they specified that if included a 'server grade' hard drive - known to most people as an enterprise hard drive. People asked what the difference was - and the simplistic answer was 'more rigorously tested' and 'longer mean time before failure'. This response would suggest that if you want the most reliable drive going - buy an enterprise drive. Surely if there was no disadvantage to buying an enterprise drive other than the cost, surely a lot more people would be doing this? Does anyone have more information about performance in a desktop situation comparing desktop vs enterprise drives?