Samsung SSD 850 Evo: Risks of Rapid Mode?
- Thread starter AustinMS
- Start date
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Solandri
Illustrious
- Jan 4, 2012
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RAPID mode tricks benchmark programs into testing your memory speed instead of the drive speed, making owners feel better about their purchase.
Seriously, that's pretty much all it does. Windows already uses free (unused) memory as a disk cache. Benchmark programs know about this so take care to bypass it when running. That way they're measuring drive speed rather than memory speed. RAPID mode is just a disk cache, but benchmark programs don't know about it and don't bypass it. So they end up measuring your memory speed instead of your SSD speed.
There are some very specific cases where RAPID mode could be useful. If you know you need a disk cache of a certain size, then you can use RAPID mode to force Windows to reserve memory for that cache. As I said, Windows' built-in cache only uses free memory, so if you have programs taking up most of your RAM, that could cause Windows' disk cache size to shrink to where it's ineffective for your high I/O application.
Seriously, that's pretty much all it does. Windows already uses free (unused) memory as a disk cache. Benchmark programs know about this so take care to bypass it when running. That way they're measuring drive speed rather than memory speed. RAPID mode is just a disk cache, but benchmark programs don't know about it and don't bypass it. So they end up measuring your memory speed instead of your SSD speed.
There are some very specific cases where RAPID mode could be useful. If you know you need a disk cache of a certain size, then you can use RAPID mode to force Windows to reserve memory for that cache. As I said, Windows' built-in cache only uses free memory, so if you have programs taking up most of your RAM, that could cause Windows' disk cache size to shrink to where it's ineffective for your high I/O application.
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