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mkfs.jffs2 ?!

DISCUSSION Manuel Sahm 2 participants 3 messages May 21, 2008 Memory technology devices (MTD)

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Manuel Sahm

author
#0 lore raw

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........

#1 lore raw

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 <[email protected]>:

Quoted 35 lines

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/

author
#2 lore raw

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

Quoted 46 lines · 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 <[email protected]>:

Quoted 36 lines

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/

Signature · 32 lines
Freundliche Grüße / Best regards 

Manuel Sahm	

Research & Development

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