nandsim LEB size mismatch

nandsim LEB size mismatch

[Simon Liddicott]

Hi

I've searched the archives and read the FAQ but not found anything
that matches my situation.

I am trying to read an image I think is made for an MT29F2G08ABAEA.

I have run the following:

$ sudo modprobe nandsim first_id_byte=0x2c second_id_byte=0xda \
third_id_byte=0x90 fourth_id_byte=0x95
$ sudo flash_erase /dev/mtd0 0 0
$ sudo modprobe ubi mtd=0
$ sudo ubimkvol /dev/ubi0 -N RFS -s $((0xA00000))

Volume ID 0, size 82 LEBs (10579968 bytes, 10.1 MiB), LEB size 129024
bytes (126.0 KiB), dynamic, name "RFS", alignment 1

$ sudo ubiupdatevol /dev/ubi0_0 RFS.bin
$ sudo mount /dev/ubi0_0 /mnt

mount: wrong fs type, bad option, bad superblock on /dev/ubi0_0,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

[1975256.515179] UBIFS error (pid 10309): validate_sb: LEB size
mismatch: 126976 in superblock, 129024 real

I think that nandsim provides the 'real' value for LEB size, and even
if the value is right - how can I read the data that expects a 124KiB
LEB size?

Any help appreciated.

Thanks in advance.

Simon.

Re: nandsim LEB size mismatch

[Simon Liddicott]

On 11 October 2013 14:57, Simon Liddicott <simon@liddicott.com> wrote:
> Hi
>
> I've searched the archives and read the FAQ but not found anything
> that matches my situation.
>
> I am trying to read an image I think is made for an MT29F2G08ABAEA.
>
> I have run the following:
>
> $ sudo modprobe nandsim first_id_byte=0x2c second_id_byte=0xda \
> third_id_byte=0x90 fourth_id_byte=0x95
> $ sudo flash_erase /dev/mtd0 0 0
> $ sudo modprobe ubi mtd=0
> $ sudo ubimkvol /dev/ubi0 -N RFS -s $((0xA00000))
>
> Volume ID 0, size 82 LEBs (10579968 bytes, 10.1 MiB), LEB size 129024
> bytes (126.0 KiB), dynamic, name "RFS", alignment 1
>
> $ sudo ubiupdatevol /dev/ubi0_0 RFS.bin
> $ sudo mount /dev/ubi0_0 /mnt
>
> mount: wrong fs type, bad option, bad superblock on /dev/ubi0_0,
>        missing codepage or helper program, or other error
>        In some cases useful info is found in syslog - try
>        dmesg | tail  or so
>
> [1975256.515179] UBIFS error (pid 10309): validate_sb: LEB size
> mismatch: 126976 in superblock, 129024 real
>
> I think that nandsim provides the 'real' value for LEB size, and even
> if the value is right - how can I read the data that expects a 124KiB
> LEB size?
>
> Any help appreciated.
>
> Thanks in advance.
>
> Simon.


I didn't get a reply, but have managed to find out how to do it.

The correct instructions should be:
$ sudo modprobe nandsim first_id_byte=0x2c second_id_byte=0xda \
third_id_byte=0x90 fourth_id_byte=0x95
$ sudo flash_erase /dev/mtd0 0 0
$ sudo ubiformat /dev/mtd0 -s 2048 -O 2048
$ sudo modprobe ubi
$ sudo ubiattach -m 0 -d 0 -O 2048
$ sudo ubimkvol /dev/ubi0 -N RFS -s $((0xA00000))
$ sudo ubiupdatevol /dev/ubi0_0 RFS.bin
$ sudo mount /dev/ubi0_0 /mnt

Success!

Re: nandsim LEB size mismatch

[Colton]

Thanks a lot Simon, this really helped me out. To anyone else who's doing 
this, make sure that when you do the "ubimkvol" command you change 0xA00000 
to a big enough filesize for your ubifs volume. I just looked at my filesize 
and converted it to hex and used that.