Jon Elson wrote: > Ralph Stirling wrote: > >> One show stopper I found with the RPi was the high probability >> of SD card corruption during power cycles (power failure without >> full OS shutdown first). Is the BeagleBone Black immune to this >> problem? The quoted ten second shutdown is good, but I'd like >> to have the flash image survive unforeseen power failures. If >> it handles those fine, then I'm ready to get excited about it. >> >> > This is a problem that has been around for some time. it is almost > certainly more > complicated than at first glance. Oh, one other data point. I have been using SanDisk 4gb SD cards, with relatively few problems. I have a Dane-Elec disk that croaked after minimal usage, and doesn't seem to be repaired by fsck. A number of other users also report good luck with official SanDisk and some other name-brand cards, and a lot of problems with off-brand or cards that might be counterfeit, bought on eBay or whatever. I bought many of my SD cards at MicroCenter.
If the power is shut off while the SD card is in the middle of a wear-leveling swap, I don't know how it will handle that. There are methods of keeping all data in a secure condition until the swap is complete, but some cheap controllers may not have firmware that does this right. If the wear-leveling remap table gets corrupted, the card is generally scrap, there's no way to reformat it. Jon ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
