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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Upgrading (https://talk.maemo.org/forumdisplay.php?f=8)
-   -   Booting from MMC on N800 Now Available!! (https://talk.maemo.org/showthread.php?t=4053)

Natehunderd 2008-04-22 03:40
Re: Booting from MMC on N800 Now Available!!
 
Excellent, easy to follow guide. My compliments. Went smooth. Thanks

davos1 2008-04-28 05:55
Re: Booting from MMC on N800 Now Available!!
 
OK I did this and all of the USB hacks but when I connect the USB and try to go to the internal memory card (the one with the cloned OS. PERFECT PARTITIONING), the computer just says "Insert a disk in drive I:". Before it said on my N800 "Internal memory card busy" or something but I managed to fix it (thanks fanoush) but I cannot fix this. Please offer your support peoples :)

GeraldKo 2008-04-28 06:13
Re: Booting from MMC on N800 Now Available!!
 
Quote:
Originally Posted by davos1 (Post 175451)
OK I did this and all of the USB hacks but when I connect the USB and try to go to the internal memory card (the one with the cloned OS. PERFECT PARTITIONING), the computer just says "Insert a disk in drive I:". Before it said on my N800 "Internal memory card busy" or something but I managed to fix it (thanks fanoush) but I cannot fix this. Please offer your support peoples :)
Take a look at this post/thread.

davos1 2008-04-28 06:33
Re: Booting from MMC on N800 Now Available!!
 
That's what I did from the start. It also never mentions the error that I'm getting.

qole 2009-02-10 01:19
Re: Booting from MMC on N800 Now Available!!
 
Quote:
Originally Posted by fanoush (Post 33348)
Yes, but not via flasher. You need to use mtd-utils. I did it few times. There is no simple way but you can use tools from initfs flasher. This is what I do:

When I like current stable system in flash (after clean reflashing and tweaking it a bit) I boot from mmc and do a backup

Code:
mount -t jffs2 /dev/mtdblock4 /opt
./mkfs.jffs2 -r /opt -o /media/mmc1/rootfs.jffs2 -e 128 -l -n
umount /opt
There is also optional sumtool command that optimizes the image a bit for faster mounting.

Code:
sumtool -i rootfs.jffs2 -o rootfs.faster.jffs2  -e 128KiB -l -n
Sorry to dredge up an old thread. How do I mount the rootfs.jffs2 image file that is created using this technique?

Is there some modification of this method that is still valid for the N8x0 tablets?

How do you mount a jffs2 image on a loop device?

fanoush 2009-02-10 08:02
Re: Booting from MMC on N800 Now Available!!
 
Quote:
Originally Posted by qole (Post 263321)
Is there some modification of this method that is still valid for the N8x0 tablets?

How do you mount a jffs2 image on a loop device?
Well, did not try but it should work. You just need losetup and block2mtd kernel module. Not sure about losetup but you can get the module from http://fanoush.wz.cz/maemo/modules-d...2maemo1.tar.gz in drivers/mtd/devices

here is mounting script that worked for me on Ubuntu PC
Code:
if [ `id -u` != 0 ] ; then
    echo "run this as root"
    exit
fi
if [ $# -lt 2 ] ; then
    echo $0 image.jffs2 directory
    exit
fi
LOOPDEV=`losetup -f`
losetup $LOOPDEV $1 #rootfs.jffs2
modprobe block2mtd block2mtd=$LOOPDEV,131072
modprobe jffs2
modprobe mtdblock
sleep 1
[ -d $2 ] || mkdir $2
mount -t jffs2 -o ro /dev/mtdblock0 $2
/dev/mtdblock0 is definitely wrong choice on the tablet. Do not even try, it may trash the bootloader, I think someone complained here it did. Most probably the right choice is /dev/mtdblock5.

Let us know how it went :-)

qwerty12 2009-02-10 08:05
Re: Booting from MMC on N800 Now Available!!
 
Quote:
Originally Posted by qole (Post 263321)
Is there some modification of this method that is still valid for the N8x0 tablets?
You should look at the article on the current wiki, I've been updating it to be a bit more current as to how the image is made etc.

fanoush 2009-02-10 08:17
Re: Booting from MMC on N800 Now Available!!
 
Quote:
Originally Posted by qole (Post 263321)
that is still valid for the N8x0 tablets?
Hmm, I was thinking you want to run it directly on the tablet (to look into created backup and maybe recover one file?) but maybe you just meant to do it on regular PC? Then the wiki page may indeed help.

qole 2009-02-10 18:58
Re: Booting from MMC on N800 Now Available!!
 
Quote:
Originally Posted by fanoush (Post 263379)
Hmm, I was thinking you want to run it directly on the tablet (to look into created backup and maybe recover one file?)
Yes, I want to be able to open these image files on the tablet.

I have slightly bigger ambitions than recovering files from a backup, however... I was hoping to be able to chroot into this image and run applications from within the image...

We'll see how it goes. Thanks so much for your help, guys!

fanoush 2009-02-12 07:43
Re: Booting from MMC on N800 Now Available!!
 
Quote:
Originally Posted by qole (Post 263545)
I was hoping to be able to chroot into this image and run applications from within the image...
Yes, this should work. One issue is that you should mount it read only to be on the safe side (and the jffs2 image is made 100% full anyway) so stuff that tries to write there fails but it shouldn't be real problem as you can mount /tmp etc. over it.


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