Did some testing, LITE isn't for production
Main concern is the activation, since I have many hardware parts laying around, I thought I should do the
public service and answer some questions.
I used a P4 (Intel M/B Perl865k, onboard SATA150, Intel Gig NIC), plus an old Tekram 390 SCSI controller (rated 40MB/s), and a 36GB SCSI HDD, another Intel 100Mb NIC.
1. Initial activation and configuration, created a vg, vl, and an NAS share, used a Linux machine as NFS client; copied over a 3.5GB VM files (size from several hundred MB to over 1GB), the crappy Tekram gave me 23MB/s over gig NIC, performance is not bad;
2. I replaced the 100Mb NIC with same model, rebooted. Had to reconfigure the external IP on the NIC, but no activation required. However, replacing it with another gig NIC requires activation. Another strange thing is that I had to reapply NFS setting for the share. Although the check box of enable NFS is checked, I had to click Apply button again, otherwise I get permission denied on NFS client.
3. I replaced the Telram with LSI1010 (rated 160MB/s), activation required. That controller gave me 32MB/s on average.
4. I added a SATA HDD, no activation required. The SATA HDD gave me 33MB/s average.
5. Identical hardware, different systems, requires activation. I tested on two identical Dell SC1425.
So it's clear now that you can replace NIC, controller with identical models, you can add HDD. I didn't try adding RAM or upgrading CPU, but I don't suppose these should be a big problem. But you can't use different NIC or disk controller, and apparently system board can't be replaced.
I got too excited too early, and ordered two SuperMicro SuperServers yesterday. But now I don't think I should use them for production given the fact that most modern systems have everything integrated on motherboard. If anything goes south, the whole system becomes useless.
This free LITE version looks more like Demo CD on USB stick. Well, what did Economic 101 tell us? No free lunch. Guess we should just quit complaining or trying.