ubifs卷挂载问题

y97788 LV 4

# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00100000 00040000 "boot0"
mtd1: 00300000 00040000 "uboot"
mtd2: 00100000 00040000 "secure_storage"
mtd3: 0fb00000 00040000 "sys"

mtd分为4个分区，mtd3关联ubi0
ubi0分了7个卷

UBI version:                    1
Count of UBI devices:           1
UBI control device major/minor: 10:123
Present UBI devices:            ubi0

ubi0
Volumes count:                           8
Logical eraseblock size:                 258048 bytes, 252.0 KiB
Total amount of logical eraseblocks:     1004 (259080192 bytes, 247.0 MiB)
Amount of available logical eraseblocks: 0 (0 bytes)
Maximum count of volumes                 128
Count of bad physical eraseblocks:       0
Count of reserved physical eraseblocks:  40
Current maximum erase counter value:     2
Minimum input/output unit size:          4096 bytes
Character device major/minor:            244:0
Present volumes:                         0, 1, 2, 3, 4, 5, 6, 7

Volume ID:   0 (on ubi0)
Type:        static
Alignment:   1
Size:        66 LEBs (17031168 bytes, 16.2 MiB)
Data bytes:  16777216 bytes (16.0 MiB)
State:       OK
Name:        mbr
Character device major/minor: 244:1
-----------------------------------
Volume ID:   1 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        69 LEBs (17805312 bytes, 16.9 MiB)
State:       OK
Name:        boot-resource
Character device major/minor: 244:2
-----------------------------------
Volume ID:   2 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        5 LEBs (1290240 bytes, 1.2 MiB)
State:       OK
Name:        env
Character device major/minor: 244:3
-----------------------------------
Volume ID:   3 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        5 LEBs (1290240 bytes, 1.2 MiB)
State:       OK
Name:        env-redund
Character device major/minor: 244:4
-----------------------------------
Volume ID:   4 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        70 LEBs (18063360 bytes, 17.2 MiB)
State:       OK
Name:        boot
Character device major/minor: 244:5
-----------------------------------
Volume ID:   5 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        732 LEBs (188891136 bytes, 180.1 MiB)
State:       OK
Name:        rootfs
Character device major/minor: 244:6
-----------------------------------
Volume ID:   6 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        5 LEBs (1290240 bytes, 1.2 MiB)
State:       OK
Name:        dsp0
Character device major/minor: 244:7
-----------------------------------
Volume ID:   7 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        8 LEBs (2064384 bytes, 1.9 MiB)
State:       OK
Name:        UDISK
Character device major/minor: 244:8

我想挂载ubi0_1卷（boot-resource）修改里面的开机logo

# mount -t ubifs ubi0_1 /mnt/boot
mount: mounting ubi0_1 on /mnt/boot failed: Invalid argument

挂载失败！

ubi0_5 (rootfs)可以挂载，ubi0_7 （UDisk）也可以挂载。
其他卷都无法挂载。

y97788 LV 4

ubiupdatevol /dev/ubi0_1 boot-resource.fex
这样可以修改整个卷的数据，但是如何修改boot-resource.fex里bootlogo.bmp，或者如何将新的bootlogo.bmp打包生成boot-resource.fex文件，然后再用上面命令来更新卷数据