Pintu, ----- Ursprüngliche Mail ----- > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0) > ============================= > > If any one has used nandsim on qemu before, please let us know the exact steps. nandsim works as expected. It creates a new and *erased* NAND for you. So you have no UBI volumes. Therfore UBIFS cannot be mounted. I suggest creating a tiny initramfs that creates UBI volumes before mounting UBIFS on one of the freshly created (and empty) volumes. Thanks, //richard