Hi Laurence, Thanks for your e-mail. These are the steps that I've done to build my root fs: * First at all, I've erased all /dev files of my root fs source, and I've created files with makedevs utility from a device_table.txt,that has all devices necesary, again. * Then, I've used mkyafffs2image tool to create a file that I suppose is the root fs image. * Finally, I've written this file into Nand Flash with SAM-BA utility from Atmel. Reset the board and boot the Kernel. Into Yaffs2's documentation there are three ways to put a yaffs2's image file into a Nand Flash, I've used the third one. On the other hand I've tried the following: 1. Boot a kernel on a jffs2 fs and then I've written into partition 2 (mtdblock2) a yaffs2's image file with mtd-utils (v 1.1.0) and reboot with root=/dev/mtdblock2. => Doesn't Work (kernel panic). 2. Boot a kernel on a jffs2 fs and then I mount -t yaffs2 /dev/mtdblock2 /media/hdd, I've copied all directories of / into partition 2 (mtdblock2) and reboot with root=/dev/mtdblock2. => Works fine. 3. I've written into Nand Flash both file systems, each one into one partition, and kernel boots on jffs2 partition, I mount -t yaffs2 /dev/mtdblock2 /media/hdd and it only has lost found folder, no more folders, and when I've tried to make a dir I get this error message: "**>> yaffs chunk 706 was not erased ... **>> yaffs chunk 1347 was not erased **>> yaffs write requiered 321 attempts mkdir: cannot create directory 'dev':Cannot allocate memory" Thanks in advance for your attention again... Kind regards. Ignacio. Message: 2 Date: Wed, 24 Sep 2008 17:33:50 +0000 From: Laurence Withers Subject: Re: [Yaffs] yaffs Digest, Vol 40, Issue 8 To: yaffs@lists.aleph1.co.uk Message-ID: <200809241733.50827.l@lwithers.me.uk> Content-Type: text/plain; charset="iso-8859-1" On Wednesday 24 September 2008, Ignacio Molinero wrote: > > I have a the same problem but at the end of the boot's log I get a > > Kernel Panic, this is my bootlog: > [snip] > > yaffs: dev is 32505857 name is "mtdblock1" > > yaffs: passed flags "" > > yaffs: Attempting MTD mount on 31.1, "mtdblock1" > > block 22 is bad > > block 23 is bad > > block 234 is bad > > block 395 is bad > > VFS: Mounted root (yaffs2 filesystem). > Looks like the kernel is happy to mount your filesystem. > > Freeing init memory: 132K > > Warning: unable to open an initial console. > This often means that /dev/console doesn't exist on the underlying device. Unless you're using initrd, /dev/console (and IIRC /dev/null) need to exist as nodes on the actual filesystem. Even if you're using udev or mdev or some other way of setting up /dev, this method won't be called until a bit later in the boot process, and you need /dev/console to begin with. How are you putting files into your filesystem? One method involves creating a yaffs2 image with mkyaffsimage or equivalent utility and then using the bootloader or mtd_utils to write it to the flash device. If you're doing that, you can simply put the device nodes into your image (use fakeroot if you don't have root access). > > Kernel panic - not syncing: No init found. Try passing init= option to > > kernel. > In the kernel source, look at the function init_post() in init/main.c . You'll see the kernel tries to execute /sbin/init, /etc/init, /bin/init and finally /bin/sh . If it can't execute any of those, you'll get the error message you just saw [also it shows you where the console message comes from]. Should the image you are writing to the flash device actually contain these files? If not, start by putting them in. Bye for now, -- Laurence Withers, -- jabber:l@jabber.lwithers.me.uk http://www.lwithers.me.uk/ tel:+447753988197 -- *Ignacio Molinero Horno **imolinero@bioingenieria.es** Departamento I+D* ------------------------------------------------------------------------ Polígono Industrial Alcalde Caballero C/ Monasterio de las Huelgas 2, nave 6 50.014 ZARAGOZA *Tfno: (+34) 976 798 200* *BIOINGENIERIA* *Fax: (+34) 976 798 201* *ARAGONESA S.L.* *www.sabia.es* ------------------------------------------------------------------------