閑著沒事玩玩ubifs

需要的資料可以到這個網站查詢：http://www.linux-mtd.infradead.org/faq/ubifs.html

1.格式化：????????????? ./ubiformat /dev/mtd4

2.創建ubi0節點：??? ubiattach /dev/ubi_ctrl -m 4

3.創建分區標識：??? ubimkvol /dev/ubi0 -N?rfs -s 81920

發現這里出錯了，I get: "init_constants_early: too few LEBs (12), min. is 17"

查了一下-s后邊是byte，81920太小了，才10k，果斷改大點?改成10m=10240*1024*8=83886080

4.掛載：???????????????? mount -t ubifs ubi0:rfs /mnt

測試：

創建測試文件：

重啟

Please press Enter to activate this console.

[root@EmbedSky /]#

[root@EmbedSky /]# mount -t ubifs ubi0:rfsaa /home/haha?(需要重新生成dev)

UBIFS error (pid 1613): ubifs_mount: cannot open "ubi0:rfsaa", error -19

mount: mounting ubi0:rfsaa on /home/haha failed: No such device

[root@EmbedSky /]#ubimkvol /dev/ubi0 -N rfsaa -s 83886080?(這一步其實不需要了)

ubimkvol: can't open '/dev/ubi0': No such file or directory

[root@EmbedSky /]# ubiattach /dev/ubi_ctrl -m 4(生成dev)

UBI: attaching mtd4 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:?????? 14

UBI: attached mtd4 to ubi0

UBI: MTD device name:??????????? "USER1"

UBI: MTD device size:??????????? 384 MiB

UBI: number of good PEBs:??????? 3072

UBI: number of bad PEBs:???????? 0

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:???? 3

UBI: available PEBs:???????????? 2379

UBI: total number of reserved PEBs: 693

UBI: number of PEBs reserved for bad PEB handling: 30

UBI: max/mean erase counter: 3/1

UBI: image sequence number:? 504227540

UBI: background thread "ubi_bgt0d" started, PID 1620

[root@EmbedSky /]# ubimkvol /dev/ubi0 -N rfs -s 83886080

UBI error: ubi_create_volume: cannot create volume 3, error -17

ubimkvol: UBI_IOCMKVOL: File exists

[root@EmbedSky /]# ubimkvol /dev/ubi0 -N rfsaa -s 83886080

UBI error: ubi_create_volume: cannot create volume 3, error -17

ubimkvol: UBI_IOCMKVOL: File exists

[root@EmbedSky /]# mount -t ubifs ubi0:rfsaa /home/haha

UBIFS: recovery needed

UBIFS: recovery completed

UBIFS: mounted UBI device 0, volume 2, name "rfsaa"

UBIFS: file system size:?? 82575360 bytes (80640 KiB, 78 MiB, 640 LEBs)

UBIFS: journal size:?????? 4128768 bytes (4032 KiB, 3 MiB, 32 LEBs)

UBIFS: media format:?????? w4/r0 (latest is w4/r0)

UBIFS: default compressor: lzo

UBIFS: reserved for root:? 3900238 bytes (3808 KiB)

[root@EmbedSky /]# cd /home

[root@EmbedSky /home]# ls

1??????????????????????????? hh

TQ210??????????????????????? hong.c

adc????????????????????????? hong.c~

adc.c??????????????????????? jpeg.tar.gz

adcs.c?????????????????????? led (copy).c~

adcs.c~????????????????????? led.c

arm-linux??????????????????? led.c~

beep???????????????????????? led1

beep.c?????????????????????? led2

beep.c~????????????????????? mjpg-streamer-r63

cap.c??????????????????????? rootfs_linux_v1.4_CoreB.bin

cap.c~?????????????????????? sky

capture01.jpg??????????????? test-mmap.jpg

ds18???????????????????????? test.bin

ds18b20????????????????????? test2

[root@EmbedSky /home]# cd haha

[root@EmbedSky haha]# ls(創建的文件還在，掛載成功)

haha.txt

[root@EmbedSky haha]#







總結

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