Need to look up Zoneminder. 
What brand of sd card? 
I bought new cards today of different brands to use/test at my local Micro Center computer store. 
2 32gb Micro Center branded $12.99 each
2 32gb Kingston $17.99 each
2 32gb Toshiba $19.99 reach. 
If all of these gets locked them is the DCS-2230.
I'll keep posted here. The micro center cards are in. 
2230-1 needed Rebooted to see the card as it was warning it wasn't properly formated, etc. But on reboot, the cameras file structure was available. 
2230-2 had no issues with hot insert. File structure setup without issue.