How can SD cards be faster than SSDs?

“Recently the good folks at Datalight published results of testing they’d done on their Reliance Nitro transactional file system and Microsoft’s Texfat (Transaction-Safe Extended FAT),” Robin Harris writes for ZDNet. “Both are used in embedded systems like ATMs and mobile devices with critical data reliability needs.”

“There’s no doubt that SSDs have more raw performance than SD cards,” Harris reports. “But in this case its not what is used, but how it is used.”

“Datalight found that creating a file and writing a file with Texfat on an SSD took over 8 seconds, while the same operations on an SD card took anywhere from 41 to 101ms,” Harris reports. “When they investigated, they found that the SSD ‘…is actually doing something (flushing data out of a cache internal to the SSD, most likely), whereas on SD – it does no additional work (since SD has no internal cache), and so… SD appears ‘faster.'”

Read more in the full article here.

MacDailyNews Take: As Harris points out, those 8 seconds could be critical in certain circumstances.

[Thanks to MacDailyNews readers too numerous to mention individually for the heads up.]


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