Re: JFFS2 mount problem on NAND flash

["Sudeep K N" <sudeepholla.maillist@gmail.com>]

Hi,

Try using the -j option with erase:
 ./flash_eraseall -j /dev/mtd8
If it still doesn't work, and its fine with SOFT_ECC, then
there is some problem with spare(oob) only write.

-- 
Regards,
Sudeep

On Jan 3, 2008 6:52 PM, Sameer <x0081444@ti.com> wrote:
> Hi,
> I am working on omap based board with 16bit, small page Samsung NAND of size 64MB.
> I have enabled hardware ecc functionality in the driver code. To test the functionality I run the
> Following tests.
> 1. When the kernel comes up, >>cat /proc/mtd
>         mtd0: 00040000 00020000 "bootloader"
>         mtd1: 00020000 00020000 "params"
>         mtd2: 00200000 00020000 "kernel"
>         mtd3: 03da0000 00020000 "filesystem"
>         mtd4: 00080000 00004000 "NAND-X-Loader"
>         mtd5: 00080000 00004000 "NAND-U-Boot"
>         mtd6: 00040000 00004000 "NAND-U-Boot Environment"
>         mtd7: 00400000 00004000 "NAND-Kernel"
>         mtd8: 03ac0000 00004000 "NAND-File System"
> 2. I erase the NAND flash filesystem partition
>         ./flash_eraseall /dev/mtd8
>         This function passes. I have verified the erase functionality using the debugger.
> 3  mount -t jffs2 /dev/mtdblock8 /mnt/nand. I have enabled the low level jffs2 fs debugging
>         Following is the error message
>
>         JFFS2: Erase block at 0x00000000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x00004000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x00008000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x0000c000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x00010000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x00014000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x00018000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x0001c000 is not formatted. It will be erased
>                                              -----
>                                                 =----
>                                         upto--
>
>         JFFS2: Erase block at 0x03a9c000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x03aa0000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x03aa4000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x03aa8000 is not formatted. It will be erased
>         FFS2: Erase block at 0x03aac000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x03ab0000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x03ab4000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x03ab8000 is not formatted. It will be erased
>         JFFS2: Erase block at 0x03abc000 is not formatted. It will be erased
>         Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
>         mpty_blocks 0, bad_blocks 0, c->nr_blocks 3760
>         mount: Mounting /dev/mtdblock8 on /mnt/nand failed: Input/output error
>
> But when I enable the SW_ECC functionalilty I am able to mount the jffs2 fs and perform the fs operations
>
> I am beginner for JFFS2 fs.Could you please let me know what causes this error.
>
>
> Regards,
> -Sameer
>
>
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