ubifs制作

uboot配置：

bootargs=initrd=0x10c00000,0x1200000 root=/dev/ram rw init=/linuxrc console=ttymxc3,115200n8 mem=512M ubi.mtd=7,4096 mtdparts=gpmi-nand:2048m(storage1)

/ # ubinfo /dev/ubi0
ubi0
Volumes count:                           0
Logical eraseblock size:                 516096 bytes, 504.0 KiB
Total amount of logical eraseblocks:     2042 (1053868032 bytes, 1005.0 MiB)
Amount of available logical eraseblocks: 2018 (1041481728 bytes, 993.2 MiB)
Maximum count of volumes                 128
Count of bad physical eraseblocks:       6
Count of reserved physical eraseblocks:  20
Current maximum erase counter value:     4
Minimum input/output unit size:          4096 bytes
Character device major/minor:            253:0

ubimkvol /dev/ubi0 -s 1041481728 -N nand

 

/ # mount -t ubifs /dev/ubi0_0 /home/root/imx6q/nand/
[  134.297128] UBIFS: default file-system created
[  134.405873] UBIFS: mounted UBI device 0, volume 0, name "nand"
[  134.411795] UBIFS: file system size:   1036320768 bytes (1012032 KiB, 988 MiB, 2008 LEBs)
[  134.420023] UBIFS: journal size:       33546240 bytes (32760 KiB, 31 MiB, 65 LEBs)
[  134.427616] UBIFS: media format:       w4/r0 (latest is w4/r0)
[  134.433490] UBIFS: default compressor: lzo
[  134.437604] UBIFS: reserved for root:  4952683 bytes (4836 KiB)

 删除ubi0_0节点：
umount /home/root/imx6q/nand

ubirmvol /dev/ubi0 -n 0