This afternoon my headless ubuntu machine seemed to dissapear from the network. COuldnt ping it, SSH sessions that were ongoing suddenly died.
I rebooted the machine and...nothing. A few seconds of drive activity and then the machine just sits there. I connected it up to a monitor, and I can see the BIOS come up, check for a bootable CD, and then seemingly try to boot from the HDD, but nothing happens.
I suspect that I might be in the wrong place here, as it may well not be a ubuntu issue - I boot into a livecd, and mount the drive and look in /var/logs, and can see nothing at all since the last time I rebooted, several days ago. Its as if the BIOS has 'lost' the install.
Ive confirmed the partition is marked bootable, and reinstalled/reconfigured grub, but nothing. Any ideas/suggestions?