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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 05-01-2011, 05:30 PM   #1
_spectrum_
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Registered: Jun 2009
Posts: 16

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jffs2 issues


Hi all,

i am looking for some help on an issue with jffs2: i can create jffs2 fs, mount, store edit/write some files, unmount,
but in a next mount i find no more files/dirs.

MTD probe detect correctly my flash, the chip have erase sectors of 4KB, or blocks of 64KB. MTD shows correctly a 0x1000 erase size.

/ # / # cat /proc/mtd
dev: size erasesize name
mtd0: 00010000 00001000 "Colilo (64K)"
mtd1: 002f0000 00001000 "Kernel+ROMfs (3008K)"
mtd2: 00100000 00001000 "JFFS2 (1024K)" <--- want to use this partition only as jffs2 to store non volatile data
mtd3: 0009d000 00001000 "ROMfs"


So from uClinux, i try to prepare the jffs2 fs:

# eraseall /dev/mtd2
erased 1024 Kibyte @ 0 -- 100% complete.

cat /dev/mtd2 i see the flash has been cleared

then i create a folder "backup" in /var with some files and try to crete the jffs2 fs:

mkfs.jffs2 -d backup -o jffs2.img

cp /dev/mtd2 jffs2.img

Then i just mount/umount the device, but i get often the issue described, remounting, no files.

Writing files is also notice some MTD debug trace, maybe an error:
Node totlen on flash (0xffffffff) != totlen from node ref (0x00000074)

Any help is really appreciated.

many thanks
angelo

Last edited by _spectrum_; 05-01-2011 at 05:36 PM.
 
  


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