We have a working T30 board with a root filesystem we want to put on other boards too. So we replaced the file system in a bitbake build with that one. Then creating the image (update.sh -o) to flash over tftp.
After flashing the size of the root file system given with df is just as big as the root.ext3 image. But the partitioning was done correctly (fdisk). In the update.sh script we read that the rootfs will get resized later on the target.
How and where gets the resize done? Because doing a resize2fs on each target manually is a bit exhausting.