[ipxe-devel] keeping variable values over warm reboot possible?

Brian Rak brak at gameservers.com
Sun Dec 29 01:31:56 UTC 2013

You can keep track of this on the boot server pretty easily.  Load a 
script via HTTP, and you can use your web programming language of choice 
to decide if a machine has rebooted recently or not (I would suggest 
keeping track via mac address, that seems to be the most reliable way, 
even across manufactures (supermicro) that don't bother setting BIOS 
serial numbers).

On 12/28/2013 7:51 PM, Oliver Rath wrote:
> Hi list,
> ist it possible to keep some variable values over warm reboot? The idea
> is to execute something from net, the reboot and second time ipxe-script
> knows, that he was just rebooted before, so he is able to do different
> actions like local boot.
> Imho there exist a battery-buffered cmos-ram for saving values most for
> bios. but maybe this is useable for ipxe, too?
> Alternativly, could it be possible to start a boot from 2nd source of
> boot order directly out of linux?
> Tfh!
> Oliver
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