Re: [Yaffs] Yaffs mount

If you just type
mount
you will see what is mounted
df
will tell you what space is available

An empty yaffs mount point will have lost+found in it.

What you need to do is to first make sure your drivers are working properly.

1Mount an empty partition
2. Write a few files
3. Reset the board
4. Mount again.

If the files are still there then at least the driver read/write routines
are working.


Check now with more files, delete files etc etc.

Once all those are working, then start worrying about writing an image.




On Wed, Apr 9, 2014 at 2:41 PM, kelvin <qyq1226@gmail.com> wrote:

> HuangAlex <by_pacific <at> hotmail.com> writes:
>
> >
> >
> > Hi guys,
> >
> > I just follow this command to mount yaffs img to a flash, but i just see
> lost+found directory. Can anyone see whats wrong with it? Thank you,
> >
> > Setup environment
> > 1 . Install mtd tools
> > sudo apt-get install mtd-utils
> >
> > 2. Install "git" tool for download
> > sudo apt-get install git-core
> >
> > 3. Download newest yaffs2 filesystem code
> > sudo git clone git://www.aleph1.co.uk/yaffs2
> >
> > Config yaffs2 filesystem
> > 1. Generate yaffs.ko
> > cd xxx/yaffs2
> > cp ./ yportenv_multi.h ./yportenv.h
> > sudo make modules
> > These commands will generate yaffs2multi.ko
> >
> > 2. Insmod needed ko files
> > sudo modprobe mtd
> > sudo modprobe mtdchar
> > sudo modprobe mtdblock
> > cd xxx/yaffs2
> > insmod ./yaffs2multi.ko
> > Then, use "cat /proc/filesystem ", you will see that "yaffs2" file system
> is listed in the supported filesystem.
> >
> > 3. Use nandsim to generate a simulated nand flash device
> > sudo modprobe nandsim first_id_byte=0x20 second_id_byte=0xa2
> third_id_byte=0x00 fourth_id_byte=0x15
> >
> >
> > Generate a yaffs2image using mkyaffs2image
> > 1. Create rootfs
> > Create "rootfs" dir anywhere, and add bin/, etc/, lib/, root/, tmp/
> subdirectory, "hello.txt" file.
> > 2. Generate
> > xxx/mkyaffs2image xxx/rootfs rootfs.image
> > The rootfs.image is needed to write to nand flash.
> >
> > Mount yaffs2 image to nand flash
> > 1. Erase flash
> > sudo flash_eraseall /dev/mtd0
> >
> > 2. Write image to flash
> > nandwrite -a -o /dev/mtd0 rootfs.image
> >
> > 3. Mount
> > Create xxx/yaffs2_mount
> > mount -t yaffs2 /dev/mtdblock0 xxx/yaffs2
> > cd xxx/yaffs2
> > You will see bin/, etc/, lib/, root/, tmp, and hello.txt, which are
> created when generating yaffs2 image file.
> >
> >
> >
> >
> > _______________________________________________
> > yaffs mailing list
> > yaffs <at> lists.aleph1.co.uk
> > http://lists.aleph1.co.uk/cgi-bin/mailman/listinfo/yaffs
> >
> I follow this step.
> And my rootfs.image has 3 files.
>
> But the third
> "> Create xxx/yaffs2_mount
> > mount -t yaffs2 /dev/mtdblock0 xxx/yaffs2
> > cd xxx/yaffs2" maybe some mistake.
> The last parameter of the commad mount is the mount-point,and it may be the
> XXX/yaffs2_mount not the xxx/yaffs2..
> After I mount my yaffs to a mount-point.And cd the mount-point to use "ls",
> There are some error:
> ls:reading directory .:Not a directory
>
> When I execute the mount commad at the same mount-point
> There are errors as follow:
> mount: /dev/mtdblock0 already mounted or /mnt/yaffs busy
> mount: according to mtab, /dev/mtdblock0 is already mounted on /mnt/yaffs
>
> I think this mean I have mount the yaffs to the point,but I cannot see the
> contents in my rootfs.image.
> Can anyone help me?Thank you very much.
>
>
> _______________________________________________
> yaffs mailing list
> yaffs@lists.aleph1.co.uk
> http://lists.aleph1.co.uk/cgi-bin/mailman/listinfo/yaffs
>