04-18-2015 02:18 AM - edited 04-18-2015 04:47 AM
Some SSDs (eg MX200) are marketed with the feature "power loss protection",
Is this just some capacitors providing power for some microseconds or is it more? And why was the power loss protection cut out of the BX100 specification?
Why is only "data at rest" protected? It seems to be quite counter intuitive not to protect data, which is being used (eg in cache or copied or something else) by a feature called "power loss protection",
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04-18-2015 03:38 AM
I think it's mostly to prevent this scenario which affects older SSD's (of all brands): http://forum.crucial.com/t5/Crucial-SSDs/Why-did-my-SSD-quot-disappear-quot-from-my-system/ta-p/6521...
The BX100 is a budget drive. I ahve to admit, i'm unaware of whether it has this feature or not. But I wouldn't be surprised if some of the features of the higher end drives are cut from it's design.
Your M4 doesn't have this feature either, but your MX100 does.
04-18-2015 03:42 AM
I think that your questions could be answered by Crucial staff but you may want to look at few articles (provided you haven't done that yet )
http://www.anandtech.com/show/8528/micron-m600-128gb-256gb-1tb-ssd-review-nda-placeholder - take a look at 'Power-Loss Protection' section
And maybe this one - http://lkcl.net/reports/ssd_analysis.html - keep in mind that M4 doesn't have power loss protection
Also, according to some reviewers in touch with Crucial, as for the on-the-fly user data there is only ever around 2-4MB in the volatile cache.
04-18-2015 07:07 AM - edited 04-18-2015 07:09 AM
Okay, now i have a better understanding of this product feature. Thanks targetbsp and bogdan!