Zygo Blaxell posted on Sat, 23 Aug 2014 12:38:05 -0400 as excerpted: > Consumer SD cards are /terrible/ storage devices. Always back up all > data written to an SD card as soon as possible after writing it, and > develop a process to restore the backup to a new SD card conveniently > when--not if--the card fails. > > Over the years I've burned my way through dozens of SD cards in Pis, > Beagles, x86 laptops, USB SD card readers, cameras and cell phones. > I have more bad or failed cards than good ones in my collection, but no > more than three of any specific model. Brand, price, and specs don't > correlate to success or failure. Even the good cards wear out after > heavy use. The bad ones fail much faster, and are more likely to give > you garbage data instead of properly formed I/O errors as they fail. I had read that it was bad, but I didn't know it was /that/ bad. The ones I've used have tended to be write-once, read for quite some time, often lose (or throw away as obsolete due to tiny size) before I write them again, or at least before I write them half a dozen times, and I've generally not has problems with them doing that, but I wouldn't tend to know about routine rewrite behavior. Sounds like it's much worse than I might have thought. Thanks. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
