I've just bought a raq4r, it had no hard drive so I fitted a new 80Gb hard drive into it but it will not boot from the network. I've tried a different hard drive, different memory, different memory banks, different IDE cable, different network cable. I know the problem is with this machine because I have another raq4 that boots from the network without any problems.
My questions are:
does the raq4r HAVE to have two drives fitted? and if so do they have to be identical?

The console of the boot process shows:

Cobalt Networks, Inc. - Connecting the Dots
Firmware version 2.3.34

Current date: Aug 05 13:28:14 UTC 2009
ROM build info: Sun Sep 10 20:45:49 PDT 2000 freakshow.cobaltnet.com
System serial number: 4H02CM0448641
Memory found: 64 MB
Initializing I2C bus: done
Scanning PCI bus: done
Initializing IDE: done
IDE 0 master: found
Initializing SCSI: done
Initializing ethernet: 2 ethernet controllers installed - done
Initializing flash: done
Flash bank 0: STMicroelectronics M29F080A 1MB (20:f1)
Flash bank 1: not installed.
Initializing USB: done
Mounting rom_fs: done
Initializing i18n - language "en": done

Press spacebar to enter ROM mode
Booting default method - From network

First stage kernel: Decompressing -
Cobalt Networks, Inc. - Connecting the Dots
Firmware version 2.3.34

Current date: Aug 05 13:28:59 UTC 2009....etc etc

as soon as it gets to 'Decompressing' it reboots again and loops endlessly like this.
thanks for any advice.