Installation to SD card is not the common way to use Moblin2, but I think it 
should be workable with a bit workaround, please refer to below instructions 
about Moblin2 installation on USB stick. Hope it's helpful.

Steps
(1) Boot the developer image and select "Boot" option, because we need to do 
some modifications after the installation.
(2) Launch the liveinst by clicking the "Install to Hard Drive" desktop icon, 
follow the instructions to install to your USB key or disk.
(3) In the disk selection menu, make sure you select the right disk for the 
installation, and the same disk to boot from.
(4) After the installation, launch a terminal and mount the new created root 
fs.  For example, in my Eeepc 901, there are 2 built-in SSDs (/dev/sda, 
/dev/sdb), my USB key with live developer image loaded is /dev/sdc, the target 
USB disk is /dev/sdd, and I used default partititon layout, the /dev/sdd1 and 
/dev/sdd3 will be mounted as /boot and / respectively, so I mount the /dev/sdd3 
to /mnt for the following modification.
(5) Edit the new created fstab (/mnt/etc/fstab in my case), remove any 
"/dev/sdc" node and change every "/dev/sdd" to "/dev/sdc" because I will boot 
this USB disk alone without other USB key.
(6) Umount the target root fs (umount /mnt) and mount the traget /boot (mount 
/dev/sdd1 /mnt) for editing the grub.conf
(7) Edit the target grub.conf (/mnt/grub/grub.conf in my case), revise the 
"root=" to the right disk (should be /dev/sdc3) and add "rootdelay=8" to the 
kernel command line.
(8) Reboot your netbook with the new created USB disk.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of 
[email protected]
Sent: 2009年5月29日 14:20
To: [email protected]
Subject: Re: [Moblin Dev] Installation to SD card problem


----- Original Message ----- 
From: "Michael H. Frey" <[email protected]>; "Michael H. Frey"
<[email protected]>
To: <[email protected]>
Sent: Friday, May 29, 2009 2:54 AM
Subject: [Moblin Dev] Installation to SD card problem


> I have the live image working on my eee 1000 using a 2G USB flash drive
> and 8G Sandisk Ultra II SD/USB flash drive. I can live image boot the
> USB flash drive and the Sandisk in either USB or SD mode without
> problems. I want actually install to the Sandisk in SD mode, device
> /dev/sdd, the installation appears to work properly. Reboot proceeds
> normally until the kernel panics with the following:
>
> VFS: Cannot open root device "sdd2" or unknown-block(0,0)
> Please append a correct "root=" boot option; here are the availabe
> partitions:
> ...Listing for sda and sdb...
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-root(0,0)
>
> The grub entries are:
> root (hd0,0)
> kernel /vmlinuz-2.6.29.3-13.1.moblin2-netbook ro root=/dev/sdd2 quiet
> vga=current
> I removed the "quiet vga=current" with the grub editor.
>
> I installed the image to sdd using the normally created partitions, set
> the installation to boot from sdd, and installed to boot loader on sdd.
>
> Any help in correcting this would be appreciated.
>
> Mike
> ___________
I can't answer your question but I am interested to know how you intend
prevent unwanted writes to the SD.
I have installed the live image on a Compact Flash (/dev/sda) card from USB,
also an image that I made using MID2. They both boot OK on my IEI Kino-Atom
board .
I can (re)mount /tmp on RAM OK but the problem comes with /var. There is so
much that it expected to exist in /var that it crashes after a remount to
RAM.
Ideally the RFS should all exist in RAM which I guess the USB stick does.

Ken


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