mkfs.jffs2 ?!

mkfs.jffs2 ?!

[Manuel Sahm]

Hello,

I have lot of problems concerning my NANDflash:

I?ve downloaded mtd-utils 1.1.0 and compiled it on my host pc [Suse 
Linux 10.2 - Kernel 2.6.18]

I enter:
mkfs.jffs2 -d /exports/ -p -s 0x800 -e 0x20000 -n -l -o /RFS.jffs2

NAND Flash has Pagesize = 2048 Byte = 2kByte
EraseBlockSize= 128 kByte
oob = 64

I could mount the Image on my target [linux 2.6.25.3]through:

mount -rw -t jffs2 /dev/mtdblock5 /media/DATAfs

BUT:
If I want to write to the device like: touch /media/DATAfs/test.txt
and then unmount /media/DATAfs/test.txt
and mount -rw -t jffs2 /dev/mtdblock5 /media/DATAfs


There?s an message:

empty flash at [address] end at [address] !!!!!!!!!!!!!!!!!!!!!!!


Please help me........

Re: mkfs.jffs2 ?!

[Jason Liu]

before mount please erase the partition and then mount & copy files to
the mount point,
remount and see what happen. empty flash at [address] end at [address]
!!!!!!!!!!!!!!!!!!!!!!!
is no harmfull message. the wrong configration when use mkfs.jffs2
will also lead to it.
such as the erase size is not the same with your nand flash used.

2008/5/21 Manuel Sahm <Manuel.Sahm@feig.de>:
> Hello,
>
> I have lot of problems concerning my NANDflash:
>
> I?ve downloaded mtd-utils 1.1.0 and compiled it on my host pc [Suse
> Linux 10.2 - Kernel 2.6.18]
>
> I enter:
> mkfs.jffs2 -d /exports/ -p -s 0x800 -e 0x20000 -n -l -o /RFS.jffs2
>
> NAND Flash has Pagesize = 2048 Byte = 2kByte
> EraseBlockSize= 128 kByte
> oob = 64
>
> I could mount the Image on my target [linux 2.6.25.3]through:
>
> mount -rw -t jffs2 /dev/mtdblock5 /media/DATAfs
>
> BUT:
> If I want to write to the device like: touch /media/DATAfs/test.txt
> and then unmount /media/DATAfs/test.txt
> and mount -rw -t jffs2 /dev/mtdblock5 /media/DATAfs
>
>
> There?s an message:
>
> empty flash at [address] end at [address] !!!!!!!!!!!!!!!!!!!!!!!
>
>
> Please help me........
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
>

Re: mkfs.jffs2 ?!

[Manuel Sahm]

Hello,

I have make a pertition of 5 MB through the Kernel Partitioning.
my jffs2 Image has a size of 128kB

If I mount the jffs df -h says:


Filesystem               size      used        available   Use%       
Mounted on
/dev/mtdblock5       5.0M   388.0k   4.6M        8%            
/media/DATAfs  

If I write to /media/Datafs, does the system automatically increase my 
mounted jffs image ?

I defenitly have the right erase size ----- maybe it is an endian problem ?
How could I see which endian I need (little or big) ?

Thank you



Jason Liu schrieb:
> before mount please erase the partition and then mount & copy files to
> the mount point,
> remount and see what happen. empty flash at [address] end at [address]
> !!!!!!!!!!!!!!!!!!!!!!!
> is no harmfull message. the wrong configration when use mkfs.jffs2
> will also lead to it.
> such as the erase size is not the same with your nand flash used.
>
> 2008/5/21 Manuel Sahm <Manuel.Sahm@feig.de>:
>   
>> Hello,
>>
>> I have lot of problems concerning my NANDflash:
>>
>> I?ve downloaded mtd-utils 1.1.0 and compiled it on my host pc [Suse
>> Linux 10.2 - Kernel 2.6.18]
>>
>> I enter:
>> mkfs.jffs2 -d /exports/ -p -s 0x800 -e 0x20000 -n -l -o /RFS.jffs2
>>
>> NAND Flash has Pagesize = 2048 Byte = 2kByte
>> EraseBlockSize= 128 kByte
>> oob = 64
>>
>> I could mount the Image on my target [linux 2.6.25.3]through:
>>
>> mount -rw -t jffs2 /dev/mtdblock5 /media/DATAfs
>>
>> BUT:
>> If I want to write to the device like: touch /media/DATAfs/test.txt
>> and then unmount /media/DATAfs/test.txt
>> and mount -rw -t jffs2 /dev/mtdblock5 /media/DATAfs
>>
>>
>> There?s an message:
>>
>> empty flash at [address] end at [address] !!!!!!!!!!!!!!!!!!!!!!!
>>
>>
>> Please help me........
>>
>> ______________________________________________________
>> Linux MTD discussion mailing list
>> http://lists.infradead.org/mailman/listinfo/linux-mtd/
>>
>>     

-- 
Freundliche Grüße / Best regards 

Manuel Sahm	

Research & Development

FEIG ELECTRONIC GmbH
Lange Straße 4
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Germany
 
Tel.:  +49 (0)6471-3109.492
Fax.:  +49 (0)6471-3109.99
email: manuel.sahm@feig.de
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