hi,everyone, in our project we use both onboard nand flash and sdcard without os support. as sd is similary to bare nand flash,we decided to use yaffs2 as default file system.but sd has it own controllor that can do some work like wear-leveling ,so i'm not sure weather this solution can works well. i nead your help. thanks. ------- Regards, Ezio
add, as yaffs2 can work as module in linux ,if i work under linux,can this solution works? ------- Regards, Ezio
SD cards are *not* like bare flash memory, due to their internal controller. They act as a block device and their internals are a 'black box' for you. UBI, JFFS2 and YAFFS are working only on bare flashes and not on block devices. Use one of the other available filesystems supported in Linux for your SD card.