On 8/24/2016 8:12 AM, Robert Krawitz wrote: > I've also found SD cards to be unreliable (sometimes but not always > DOA) compared to SSD. I bought a new micro SD for my phone; I tested > it prior to entering it into service, and it locked up hard after > about 4 GB of testing, after which it went permanently catatonic. The > card it replaced developed silent write errors after about 2 years.
I've had USB flash drives show up DOA, too. Electronics fail. It happens. That said, none of my Samsung and SanDisk SD and micro SD cards have failed on me. I can't speak to cheaper brands like PNY; I tend to avoid them because of poor performance. But a thing to remember: any of our experiences, good or bad, are statistically insignificant. These cards -- or more accurately the flash chips in them -- are manufactured in quantities measured in tens, maybe hundreds, of millions. > And I had had another such that was *ahem* mismarked. Fakes are a thing, especially in the higher capacities. On 8/23/2016 11:41 PM, Eric Chadbourne wrote: > Fascinating stuff. Was just reading about the "protected area". > Didn't know about that. https://en.wikipedia.org/wiki/Secure_Digital That protected area is what differentiates SD (Secure Digital) from MMC (Multi-Media Card). I don't know any manufacturer that's actually used that protected area; it's really just there as a sop to Big Content like the blank tape tax. -- Rich P. _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
