EndRun Sonoma D12 - Recovering from a Failed Kernel Upgrade

S o n o m a U s e r M a n u a l
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A P P E N D I X B
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S o n o m a U s e r M a n u a l
U P G R A D I N G T H E F I R M W A R E
Next, update the default le system partition by issuing this command to your Sonoma console:
updatekernelflag 1
You should see this line displayed:
Default Kernel now set to: UPGRADE
Finally, reboot the system by issuing this command at the shell prompt:
reboot
Wait about 90 seconds for the system to shutdown and reboot. Then log in to the Sonoma using
telnet or ssh. If all has gone well, you should be able to log in the usual way. You can check the
running kernel version at any time by issuing
kernelversion
which will cause the kernel version message to be displayed.
You can also check to see which kernel image the system is currently booted under by issuing this
command at the shell prompt:
syskernel
Which should cause this to be printed to the console:
BOOTED KERNEL IMAGE = 1 (Upgrade)
If so, and your unit seems to be operating normally, you have successfully completed the kernel
upgrade. If your unit does not boot up successfully, and you are not able to telnet or ssh into the
system after 90 seconds, then there has been some kind of problem with the kernel upgrade. It is
possible that the le downloaded was corrupt or that you forgot to set your ftp download le mode
to binary when downloading the le--either from the EndRun Technologies website or when transfer-
ring it to the Sonoma.
Recovering from a Failed Kernel Upgrade
To restore your Sonoma to a bootable state using the factory kernel, you must use the serial I/O port
and reboot the Sonoma by cycling the power. Refer to Chapter 2 – Basic Installation, Connect the
Serial I/O Port and Test the Serial I/O Port for setup details. When you have connected your termi-
nal to the serial I/O port, apply power to the Sonoma.
Pay close attention to the terminal window while the unit is rebooting. After the Linux bootloader
displays the message
Default kernel: UPGRADE
To override and boot the FACTORY version of the kernel,
type FACTORY within 5 seconds