Network down: Dell Poweredge 1800 hanging at PXE boot after dhcp server turned off
Our domain controller/fileserver died today, while I was midway through creating a backup controller. The new server is a recently acquired Poweredge 1800. I disabled dhcp server and dhcp client (as it began serving the wrong address range as soon as the PDC went down), set a fixed ip (so that it would not matter that the dhcp server was off) and restarted. My intention was to restore the dhcp and dns backup onto this new server after restart, but unfortunately I didn't get that far.
Upon restart the server hung at PXE boot with the error:
PXE-E51: no dhcp or proxydhcp offers were received
Research indicates this happens when the RAID is dead. However I can see all the RAID drives in the bios raid manager, online and waiting to go. I have tried going into the boot sequence of the server and disabling the network card, but that just gives me "no boot device found" error.
The really odd thing is that when the network cable was unplugged, and dhcp server running, I could restart the server no problems. So I realise the problem is the dhcp server - but without the ability to get into Windows I can't turn the service back on again.
I can use Hirens to boot into Mini Windows, set an IP and access the Internet fine (but the IP configuration is cleared once the server restarts).
Any help gratefully - and urgently appreciated. School starts in 4 days and we have no domain controller, and my best copy of the data was on the server which is now refusing to go past boot.