Oh, and right . . . http://lwn.net/Articles/428584/
Read if you're really worried *that* much. On Sun, Feb 14, 2016 at 6:02 PM, William Hermans <[email protected]> wrote: > *BTW, 8192 is all mostly tied to fat, which we don't use anymore by >> default...* >> >> * >> https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey >> <https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey>* >> >> * under: "FAT optimization"* > > > Some people seem to think that 8192 sectors is where an sdcard needs to > start in order to perform the best, and to keep from "destroying" the card. > Something to do with where erase blocks start and all that but . . . I've > been using 2048 now for 3 years with this hardware using the same sdcard, > and have written at least 50 fresh images to it . . . > > It's not as though this hardwares sdcard controller is the fastest around > either . . . because it's not. From what I've read for performance specs of > the rPI's sdcard. This one is about half as fast. BUt the rPI also does not > have an on board eMMC either. > > Anyway, there seems to be a lot of concern about prematurely killing > sdcard using wrong sector values, and perhaps that is true, but I've yet to > see a card failure yet on our BBB's . . . > > On Sun, Feb 14, 2016 at 5:47 PM, Robert Nelson <[email protected]> > wrote: > >> On Sun, Feb 14, 2016 at 6:43 PM, Robert Nelson <[email protected]> >> wrote: >> > On Sun, Feb 14, 2016 at 6:26 PM, joelk <[email protected]> wrote: >> >> >> >> I downloaded the debian 7.9 console image >> >> (bone-debian-7.9-console-armhf-2015-11-03-2gb.img) and wrote it to a >> micro >> >> sd card using dd: >> >> >> >> dd bs=4M if=bone-debian-7.9-console-armhf-2015-11-03-2gb.img >> of=/dev/sdb >> >> >> >> I notice that after flashing, the sdb1 partition on the card begins at >> >> sector 2048. The original formatting of these cards have the data area >> >> beginning at sector 8192 and other sd card images that I've written >> (e.g. >> >> Raspbian Jessie) also start at sector 8192. I was under the >> impression that >> >> this was done to reduce the number of pages that have to be rewritten >> when >> >> data is saved to the card. >> >> BTW, 8192 is all mostly tied to fat, which we don't use anymore by >> default... >> >> >> https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey >> >> under: "FAT optimization" >> >> Regards, >> >> -- >> Robert Nelson >> https://rcn-ee.com/ >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
