UBIFS

Page under construction... Informations on this page are not guaranteed !!

This is a preliminary page dealing with the installation of UBIFS on the APF boards. UBIFS will replace JFFS2 file system on NAND (and NOR as well) based board because JFFS2 induces a big overhead when parsing, reading and writing large devices UBISFS scalability For the time being, this procedure can only be used with the apf27 board. Volunteers a welcome to investigate solutions to use UBIFS on the apf9328.

Introduction

UBIFS website

Setting up

• host system: add uuid-dev packages (should be already installed as required to build the HEAD of Armadeus repository) :

 sudo apt-get install  uuid-dev

• buildroot: target filesystem -> ubifs root filesystem (PEB=0x20000, LEB=0x1F800, minIO=0x800, SUBPAGESIZE=512, MAXLEB=2047) and for apf9328 should be PEB=0x20000, LEB=0x1FF80, minIO=0x1, SUBPAGESIZE=0, MAXLEB=255)
• linux: file systems -> Miscellanous -> ubifs support and disable debugging !!
• linux: device driver -> mtd -> ubi unsorted block image -> Enable UBI (4096) and disable debugging !!

• uboot: setenv bootcmd run ubifsboot
• uboot: setenv download_rootfs tftpboot ${loadaddr} ${serverpath}${board_name}-rootfs.arm.ubifs

Additional informations

A new file 'ubinize.cfg' defining the ubi volumes is located in buildroot/target/ubifs/ this file contains the different UBI volumes of the UBI image:

 [ubifs]
 mode=ubi
 vol_id=0
 vol_type=dynamic
 vol_name=rootfs
 vol_alignment=1
 vol_flags=autoresize

This file is processed by the ubinize utility after mkfs.ubifs.