I heard that the jffs2 had support for sdcards (I'm assuming that means it doesn't do wear-leveling and leaves it to the microcontroller), but that it still checks every bit on the card before loading the OS. However, I like the idea that JFFS2 has journaling which ext2 does not and probably does it in a way that's not requiring too many extra writes (like ext3). Maybe I'll try it with a reasonably sized partition and hope it doesn't take too long to boot.
On Sun, May 18, 2008 at 5:24 PM, Tim Tisdall <[EMAIL PROTECTED]> wrote: > I heard that the jffs2 had support for sdcards (I'm assuming that > means it doesn't do wear-leveling and leaves it to the > microcontroller), but that it still checks every bit on the card > before loading the OS. However, I like the idea that JFFS2 has > journaling which ext2 does not and probably does it in a way that's > not requiring too many extra writes (like ext3). Maybe I'll try it > with a reasonably sized partition and hope it doesn't take too long to > boot. > > On Sun, May 18, 2008 at 1:52 AM, Ryan Abel <[EMAIL PROTECTED]> wrote: >> [EMAIL PROTECTED] wrote: >> >>>> I've been looking into booting from the sdcard and was wondering why >>>> none of the "how to's" suggest formatting the card with jffs2. >>>> There's >>>> lots of debate between using ext2 or ext3, but nothing on using >>>> jffs2. >>>> Is there a simple reason for this I'm missing? >>> >>> JFFS2 is designed to be used on a raw flash device. SD cards have a >>> controller inside that hides the access to the raw flash and deals >>> with >>> things like write levelling, that JFFS2 would otherwise have to do in >>> software. >> >> Yes, as Ed says, jffs2 would serve no purpose for an SD card. Besides, >> can you imagine how long it would take to process a 16GB card into >> memory every mount? :shudder: >> _______________________________________________ >> maemo-developers mailing list >> [email protected] >> https://lists.maemo.org/mailman/listinfo/maemo-developers >> > _______________________________________________ maemo-developers mailing list [email protected] https://lists.maemo.org/mailman/listinfo/maemo-developers
