No problem. I do think you issue was related to object detect...its a common problem.
With direct to disk you need to ensure that the cameras i frame matches the FPS. This is because Direct to disc begins recording on the iframe
From the manual"
"The down-side to using direct-to-disc is that you will not be able to add graphic and time overlays such as the time-stamp. You will need to rely upon the camera to add these itself. Also, recording must begin at the arrival of a key-frame (complete image). If your camera sends these only infrequently, you may miss the beginning of some motion-activated recordings unless you also use the pre-trigger video buffer."
Make sure to also have an adequate pre-trigger buffer.
As far as the server, the xeon you have is actually rated lower than a modern haswell i3
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i3-4330+@+3.50GHz
I understand that you have two in there though....regardless, it is probably very power hungry. You can check this will a kill-a-watt meter. If you choose to upgrade get a new modern system. I have routinely purchased modern 4th gen haswell i5-i7 for between 300-400 refurbished. I get dell hp or lenovo business systems that are built well and reliable and generally have most of their 3 year next business day warranties available. Your current system seems like its just fine for now, so i would not recommend upgrading at this time. You should test the power consumption on it with a kill-a-watt and report back.