If you're interested in SSD, chances are you've been paying attention to the allegations of performance degradation in Intel's X25-M
dives into the issue (and many, many more topics) in 31 page exploration of the state of solid state. It's a spine-tingling read, in part explaining how write-speed degradation is largely thanks to partially used pages containing portions of deleted files. We all know deleted files typically aren't really
gone until they're overwritten, a problem in SSDs because to clear a section of a page the entire page needs to be cleared. That entails moving anything you want to keep to the cache, wiping the whole page, then re-writing that good data from cache. The hope is that a new delete command dubbed TRIM (set to find support in Windows 7
) will speed up writes by forcing the system to perform this work during deletes, but ahead of that the article still recommends Intel's drives; even at their worst they're still generally faster than the comparably priced competition when it comes to average use -- not to mention faster than your platters.