Hi Paul san When I set rootfs in USB memory, the latest kernel seems to have a problem. Please refer to log for the error. (AP3300(ap325rxa) is the same phenomenon, too.) - NFS boots both boards normally. - Both boards were confirmed a USB boot in the old kernel. (2.6.27 and 2.6.31-rc7) - rootfs is made by Debian and uses the following things. https://oss.renesas.com/modules/download/index.php?cid=61 "debian-rootfs-20091208.tar.bz2" Do you recognize this problem? Thanks, Goda