Difference between revisions of "UBIFS"
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===Linux=== | ===Linux=== | ||
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Revision as of 09:37, 25 May 2011
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 boards because JFFS2 induces a big overhead when parsing, reading and writing large devices, see UBISFS scalability.
For the time being, this procedure can only be used with the APF27 board. Volunteers are welcome to investigate solutions to use UBIFS on the APF9328.
Contents
Introduction
Host Setup
- add uuid-dev packages (should be already installed as required to build the HEAD of Armadeus repository):
$ sudo apt-get install uuid-dev
APF build config
Buildroot
$ make menuconfig
APF51:
???
APF27:
Target filesystem options --->
[*] ubifs root filesystem
(0x20000) UBI physical erase block size
(0x1f800) UBI logical erase block size
(0x800) UBI minimum I/O size
(512) UBI sub-page size
(2047) Maximum LEB count
APF9328:
Target filesystem options --->
[*] ubifs root filesystem
(0x20000) UBI physical erase block size
(0x1ff80) UBI logical erase block size
(0x1) UBI minimum I/O size
(0) UBI sub-page size
(255) Maximum LEB count
$ make
Linux
$ make linux26-menuconfig
File systems --->
[*] Miscellaneous filesystems --->
<*> UBIFS file system support and disable debugging !!
Device Drivers --->
<*> Memory Technology Device (MTD) support --->
UBI - Unsorted block images --->
<*> Enable UBI
(4096) UBI wear-leveling threshold and disable debugging !!
$ make linux26
- reflash your kernel
U-Boot envt variables
BIOS> setenv bootcmd run ubifsboot
BIOS> setenv download_rootfs tftpboot \${loadaddr} \${serverpath}\${board_name}-rootfs.arm.ubi
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.
