Re: [Yaffs] mount and remount issue of YAFFS on intiramfs.

If you are having issues with mtd utils, I recommend asking questions on the
linux-mtd list.

-- Charles


On Wednesday 10 November 2010 02:27:21 Murali N wrote:
> one problem here i am facing is i am unable to run the mtd-utils from
> intiramfs shell.
> every time i ran the "flash_erase" utility it is giving some weird error.
> It looks like binary is unable to find the linker script on the
> target. I tried copying those library files to 'lib' folder on the
> target but it didn't help.
>
> Can any one please provide any other solutions.
>
> thanks
>
> On Thu, Nov 4, 2010 at 1:01 PM, Ricard Wanderlof
>
> <ricard.wanderlof@axis.com> wrote:
> > On Thu, 4 Nov 2010, Murali N wrote:
> >> Hi,
> >> I have booted the kernel (.35) using the initramfs (not from the flash).
> >> As a testing purpose i am trying to mount the YAFFS filesystem onto to
> >> one of  the MTD partition on the flash.
> >> MTD partition information is given through kernel command line option
> >> and also make sure that the partition is erased.
> >> Initially i mounted the YAFFS filesystem onto above erased MTD
> >> partition and i am able to see only 'lost+found" directory.
> >> Later i have copied bunch of files, i am able to see those file
> >> contents properly before unmount.
> >> After i umount and mount back the partition. After the remount i am
> >> not able seen the files which i had copied.
> >> Also not seen any error messages from either YAFFS or nand driver.
> >>
> >> Here i am thinking whether the actual write is happens onto flash or
> >> not? If it is YES then when i remount i should be able to see the
> >> contents.
> >> I have given forcefully 'sync' option from the command prompt even
> >> that didn't work.
> >>
> >> Can anyone please share your thoughts/suggestions on this behavior?
> >
> > One thing you could do to see if your data is in any way written to the
> > flash, is to dump the contents of the mtd partition after umounting. If
> > the partition only contains 0xff then the data has not been written (at
> > least not where you think it has been written...).
> >
> > /Ricard
> > --
> > Ricard Wolf Wanderlöf                           ricardw(at)axis.com
> > Axis Communications AB, Lund, Sweden            www.axis.com
> > Phone +46 46 272 2016                           Fax +46 46 13 61 30