last night I had shutdown my Sheevaplug and when booting up this morning I realized it wouldn't go back online.
Accessing the usb terminal I saw it kernel panicked after initializing the network.
From this bug http://forum.soft32.com/linux/Bug-597302-kernel-panic-boot-SheevaPlug-ftopict522059.html
I realized it came from a badly installed kernel.
I went through booting again with :
setenv bootargs_console console=ttyS0,115200 ipv6.disable=1
Then watching the kernel boot, I saw the /boot partion wouldn't load.
I've to mention I installed Debian squeeze from the website of Martin Michlmayr http://www.cyrius.com/debian/kirkwood/sheevaplug/
, booting it from an external SATA hardrive. It worked fine until I update the kernel and eventually decide to reboot.
The issue was the /etc/fstab mentioned my /boot as a ext3 partition while it was ext2. This leaded to the partition never being mounted but being used for boot. So I managed reinstalling the kernel properly after fstab being fixed and /boot mounted :
sudo apt-get remove linux-image`uname -r`
sudo apt-get install linux-image-kirkwood
I also forced the flashing even though it may be unnecessary: