New hardware.. Reboot Loop
 

We recently took out our harddrive on our linux server 2.4.21. Put it in another server which has the same cpu etc.. Linux boots up and we can network in for about a minute then it reboots again. Checked everything in rc.d For the life of us we can't figure it out.. We've tried connecting in and killing everything not needed.. EVEN AGETTY... still reboots.. it will boot fine in single user mode.. Anyone help? Thanks

My first suspect is always ram.

memtest86

had the same problem with our server too, clean slackware install with bare.i kernel, system reboots in 1 minute. I identified the problem to be a module, namely 'i810tco' .

Try rmmod ing modules until you get the right one. Once you have identified the module that is getting your computer rebooted you can comment it wherever it is being called (the one I had to was called in rc.hotplug)

Compiling a custom kernel tweaked to your hardware, and not including any other module helps a lot too ;)

Good luck.

I seem to remember that others solved this problem by recompiling without the watchdog timer section of the kernel, or if you find the offending module, add it to /etc/hotplug/blacklist