If the SCSI controller blows up, even having a backup hard drive might be worthless if you can't find another that's compatible, Win2k isn't real happy to have those change without a reinstall a lot of times.
Looks like a Disk2VHD won't work directly on Win2k, but there is a workaround, though it looks like a huge hassle. That way you'd have a virtual machine that you could boot from any other hardware.
Windows Server 2000 P2V with Disk2VHD | TEK R
Maybe someone else would have another idea of an easy-ish way to make a virtual hard drive out of it, that'd keep it bootable on any hardware.