Getting this error when mounting the jffs2 partition created using mkImage..

Pedro Luis D. L. carcadiz at
Thu Dec 20 00:45:49 EST 2007

Ravi wrote:
> Hi,
>    The flash I am using on this board has 512 sectors each of 64kilobytes so the erase block size should be 64kb=0x10000.
> I also have boards which use spansion flash which has 256 sectors each of 128kilo bytes. Erase block for them is 128kb=0x20000.
> Both of the flashes behave the same way. I get the same error..
> I noticed one thing. If I do memorydump of the sectors which donot have the jffs2 image I see the begining of the sector as 19852003 0000000c f060dc98
> =>md FE7A0000
> fe7a0000: 19852003 0000000c f060dc98 ffffffff    .. ......`......
> fe7a0010: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0020: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0030: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0040: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0050: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0060: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0070: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0080: ffffffff ffffffff ffffffff ffffffff    ................
> fe7a0090: ffffffff ffffffff ffffffff ffffffff    ................
> But If I do a md of a sector which has the contents of jffs2 image then I do not see the header.
> =>md fc020000
> fc020000: b58dc90c 0ce12b39 6c6a38a3 f40a3819    ......+9lj8...8.
> fc020010: 1a1c9a18 78807e51 700008a0 79ff2580    ....x.~Qp...y.%.
> fc020020: 7682ec63 04d50b40 bbf240f6 ccbe0310    v..c... at ..@.....
> fc020030: 40203180 00030081 c9b057ff ffffffff    @ 1.......W.....
> fc020040: 19852003 0000000c f060dc98 1985e002    .. ......`......
> fc020050: 00000625 c800d476 00000009 0000003a    ...%...v.......:
> fc020060: 000081ed 00000000 000cecf3 47681135    ............Gh.5
> fc020070: 47681135 47681135 0003878e 000005e1    Gh.5Gh.5........
> fc020080: 00000872 06000000 c54a53f1 9b07730a    ...r.....JS...s.
> fc020090: 785e7455 516c5365 143e775b 9a966de1    x^tUQlSe.>w[..m.
> So I am not sure if this is normal.. Any help or pointers to solve this will be of great help.
> Strange thing is everything works fine except I get these message printed. I can access the jffs2 partition i.e read/write/execute files from it.

Wich kernel version are you using? Because I had a very similar problem and realized that any file with a name longer than 8 characters was bad written, although everything seemed to be ok and I could mount the partition. It was a bug in the JFFS2 kernel driver (I think I was using and it was corrected later.
Maybe you should check this long names issue just to be sure.


> Thanks,
> Ravishankar Govindarao
> RFL Electronics Inc.
> E-mail : Ravi.Rao at
> Voice: 973.334.3100 Ext. 233
> Fax: 973.334.3863
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> "Pedro Luis D. L." 
> Sent by: at
> 12/19/2007 04:38 AM
> To
> cc
> Subject
> RE: Getting this error when mounting the jffs2 partition created        using        mkImage..
> Ravi wrote:
>> Hi All,
>>       I have u-boot based bootloader on our custom board based on ppc405EP.
>> Various partitions are..
>> Amd/Fujitsu Extended Query Table at 0x0040
>> RoadRunner: CFI does not contain boot bank location. Assuming top.
>> number of CFI chips: 2
>> cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
>> Creating 5 MTD partitions on "RoadRunner":
>> 0x03fc0000-0x04000000 : "U-Boot based RR Boot loader"
>> 0x03fa0000-0x03fc0000 : "U-Boot Env Storage"
>> 0x03f80000-0x03fa0000 : "U-Boot Redundant Env Storage"
>> 0x027c0000-0x03f80000 : "Kernel Image"
>> 0x00000000-0x027c0000 : "JFFS2 Linux FS"
>> I have used the following command to create the jffs2 file system image.
>> $BLDTOOLS/mkfs.jffs2 -b -e 0x10000 -d $JFFS2 -p 0x27c0000 -o rr-app_64.img
>> ${MKIMAGE} -T filesystem -n 'RR App Image for AMD' -d rr-app_64.img uRR-app_64
> Hi,
> I'm not using that board so I can not tell which is the correct value, but looking at the output you send it looks like the erase size you passed when creating the image file is wrong. I suggest you to find the appropiate value and create the image. For an mpc5200b it happened to be 0x20000. May this would help.
> Good luck.
> Pedro.
> _________________________________________________________________
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