based on: linux-3.6.9, 128M Nand, busybox-1.20.2
ubi指令来自busbox。
如下：
因为ubifs本身占用，不行能把128M悉数运用，暂时只运用100M=104857600 Bytes。
~#flash_eraseall /dev/mtd1
用ramdisk发动内核，经过usb将文件体系，复制到nand flash中。
ramdisk发动内核后，刺进usb:
mount -t vfat /dev/uba1 /mnt
tar -zxvf /mnt/rootfs-busy1.20.tar.gz -C /media
然后，需要在文件体系中vi etc/init.d/rcS
参加如下：
/sbin/ubiattach /dev/ubi_ctrl -m 1
/bin/mount -t ubifs /dev/ubi0_0 /media/
reboot
u-boot,发动参数：
setenv bootargs ubi.mtd=1 root=ubi0:rootfs rootfstype=ubifs init=/linuxrc console=ttyS0,115200
内核成功发动。
ubifs移植成功今后，今后就可以扔掉yaffs2了。半个月的时刻，总算把克己fs和ubifs移植到at91sam926x上，心境大好。
## Booting kernel from Legacy Image at 20400000 …
Image Name: Linux-3.6.9
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1990904 Bytes = 1.9 MiB
Load Address: 20008000
Entry Point: 20008000
Verifying Checksum … OK
Loading Kernel Image … OK
OK
Starting kernel …
Uncompressing Linux… done, booting the kernel.
Booting Linux on physical CPU 0
Initializing cgroup subsys cpu
……
atmel_usart.0: ttyS0 at MMIO 0xfffff200 (irq = 17) is a ATMEL_SERIAL
console [ttyS0] enabled
atmel_usart.1: ttyS1 at MMIO 0xfffb0000 (irq = 22) is a ATMEL_SERIAL
atmel_usart.2: ttyS2 at MMIO 0xfffb4000 (irq = 23) is a ATMEL_SERIAL
……
Creating 2 MTD partitions on “atmel_nand”:
0x000000000000-0x000000040000 : “Partition 1”
0x000000040000-0x000008000000 : “Partition 2”
UBI: attaching mtd1 to ubi0
UBI: physical eraseblock size: 131072 bytes (128 KiB)
UBI: logical eraseblock size: 129024 bytes
UBI: smallest flash I/O unit: 2048
UBI: sub-page size: 512
UBI: VID header offset: 512 (aligned 512)
UBI: data offset: 2048
UBI: max. sequence number: 58
UBI: attached mtd1 to ubi0
UBI: MTD device name: “Partition 2”
UBI: MTD device size: 127 MiB
UBI: number of good PEBs: 915
UBI: number of bad PEBs: 107
UBI: number of corrupted PEBs: 0
UBI: max. allowed volumes: 128
UBI: wear-leveling threshold: 4096
UBI: number of internal volumes: 1
UBI: number of user volumes: 1
UBI: available PEBs: 39
UBI: total number of reserved PEBs: 876
UBI: number of PEBs reserved for bad PEB handling: 18
UBI: max/mean erase counter: 2/1
UBI: image sequence number: 1228014130
UBI: background thread “ubi_bgt0d” started, PID 855
……
ohci_hcd: USB 1.1 Open Host Controller (OHCI) Driver
at91_ohci at91_ohci: AT91 OHCI
at91_ohci at91_ohci: new USB bus registered, assigned bus number 1
at91_ohci at91_ohci: irq 36, io mem 0x00500000
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
Initializing USB Mass Storage driver…
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
rtc-at91sam9 rtc-at91sam9.0: rtc core: registered rtc-at91sam9 as rtc0
i2c /dev entries driver
at91sam9_wdt: sorry, watchdog is disabled
at91_wdt: probe of at91_wdt failed with error -5
softdog: Software Watchdog Timer: 0.08 initialized. soft_noboot=0 soft_margin=60 sec soft_panic=0 (nowayout=0)
……
UBIFS: mounted UBI device 0, volume 0, name “rootfs”
UBIFS: file system size: 108767232 bytes (106218 KiB, 103 MiB, 843 LEBs)
UBIFS: journal size: 5419008 bytes (5292 KiB, 5 MiB, 42 LEBs)
UBIFS: media format: w4/r0 (latest is w4/r0)
UBIFS: default compressor: lzo
UBIFS: reserved for root: 4952683 bytes (4836 KiB)
VFS: Mounted root (ubifs filesystem) on device 0:8.
Freeing init memory: 120K
running /etc/init.d/rcS
starting udevd…
cannot open /dev/null
udevd (898): /proc/898/oom_adj is deprecated, please use /proc/898/oom_score_adj instead.
/etc/init.d/rcS: line 21: /sbin/ubiattach: not found
dm9000 dm9000.0: eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
Please press Enter to activate this console.
