win7和win8的Superfetch*/Prefetch不一样。
intel的帮助也有提及。
In Microsoft Windows Vista* and Windows 7*, Superfetch* tracks and copies your most frequently used applications to system memory to reduce load times. Superfetch is based on the similar Prefetch feature available in Windows XP. Superfetch/Prefetch is not needed on an Intel SSD under Windows 7 or Windows Vista, and should be disabled for optimal performance.
In Microsoft Windows 8*, Superfetch functions differently than in previous versions of Windows, and should not be disabled for an Intel SSD.
而LS发的那篇网页，也提到了Superfetch*/Prefetch的某些问题。
Initially, we had configured all of these features to be off on all SSDs, but we encountered sizable performance regressions on some systems. In root causing those regressions, we found that some first generation SSDs had severe enough random write and flush problems that ultimately lead to disk reads being blocked for long periods of time. With Superfetch and other prefetching re-enabled, performance on key scenarios was markedly improved.
注意，该网页的时间是 5 May 2009 3:00 AM。
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