Hi folks. I bought one of these drives last week and when I got it installed it reported that it was a 820AS rather than a 320AS. A little trawling around the net and I discovered that my hard drive had been sold to me with dodgy firmware - the 820AS meaning 8MB cache rather than 32MB cache. So I downloaded and installed new firmware, which was supposed to fix everything. Thing is, when I look at the info re this drive in HD Tune it reports that the cache size is zero! Also tried Aida32 and it says cache size is unknown. Can these apps be trusted?