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<blockquote data-quote="MacDefender" data-source="post: 918900" data-attributes="member: 83059">Sure, bugs happen but in the time it takes for issues like this to be discovered and fixed, you aren&#039;t going to lose that much SSD capacity. TRIM calls on already-trimmed areas of SSDs generally incur no cost. (Again, I&#039;ve worked on firmware for popular SSDs for 5+ years... I am well aware of what the SSD does in response to these commands)SuperFetch and Prefetch info is directly from Microsoft, an optimization they introduced in Windows 8 and carried to Windows 10 will benchmark your SSD for random access performance and use that to guide what aspects of prefetch/superfetch to enable: <a href="https://www.howtogeek.com/256859/dont-waste-time-optimizing-your-ssd-windows-knows-what-its-doing/" target="_blank">Don’t Waste Time Optimizing Your SSD, Windows Knows What Its Doing (howtogeek.com)</a>On the systems I own, most of them do not have any Superfetch activity but do maintain Prefetch for a small set of applications, which is usually the behavior you want. Prefetch isn&#039;t just about HDD/SSD latency, it&#039;s about applications that interleave IO with CPU activity, and being able to predict the future set of IOs.If you have an old generation SATA SSD from like the days of OCZ Vertexes, sure, you might need to be careful if those SSDs are miraculously still alive. But if you have any reasonable SSD made in the last 5 years, trying to tune it this way is a total waste of time. We used to put on the data sheet the most prematurely failing numbers on our racks because of how ridiculously large those numbers already are. It wasn&#039;t at all unusual that drives we rate to a few hundred TBWs actually survive dozens of PBWs and still had not failed.</blockquote>

[QUOTE="MacDefender, post: 918900, member: 83059"] Sure, bugs happen but in the time it takes for issues like this to be discovered and fixed, you aren't going to lose that much SSD capacity. TRIM calls on already-trimmed areas of SSDs generally incur no cost. (Again, I've worked on firmware for popular SSDs for 5+ years... I am well aware of what the SSD does in response to these commands) SuperFetch and Prefetch info is directly from Microsoft, an optimization they introduced in Windows 8 and carried to Windows 10 will benchmark your SSD for random access performance and use that to guide what aspects of prefetch/superfetch to enable: [URL='https://www.howtogeek.com/256859/dont-waste-time-optimizing-your-ssd-windows-knows-what-its-doing/']Don’t Waste Time Optimizing Your SSD, Windows Knows What Its Doing (howtogeek.com)[/URL] On the systems I own, most of them do not have any Superfetch activity but do maintain Prefetch for a small set of applications, which is usually the behavior you want. Prefetch isn't just about HDD/SSD latency, it's about applications that interleave IO with CPU activity, and being able to predict the future set of IOs. If you have an old generation SATA SSD from like the days of OCZ Vertexes, sure, you might need to be careful if those SSDs are miraculously still alive. But if you have any reasonable SSD made in the last 5 years, trying to tune it this way is a total waste of time. We used to put on the data sheet the most prematurely failing numbers on our racks because of how ridiculously large those numbers already are. It wasn't at all unusual that drives we rate to a few hundred TBWs actually survive dozens of PBWs and still had not failed. [/QUOTE]

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