Nice one 00mick00. I had the same issue.
Swann DVR9-1425.
HDD stopped recording after a while.
Then, more recently, the HDD wasn't even recognised / registered on boot up.
Everything else worked OK, cameras, networking, display outputs, live view, etc. All fine. Just recording was the issue.
The main unit (the DVR) is powered by a 230v AC to 12v 2000mA DC adaptor.
In my case I had two identical PTZ cameras, one of which was also powered by a 12v DC 2000mA adapter (strangely, the other one was powered by a 500mA one!?).
Anyway, I swapped the two 2000mA adapters round and the HDD sprang back to life, was recognised on boot up and immediately started recording.
Now, I know that I didn't get them the wrong way round on install because A) One is labelled for PTZ use and came in a separate box, and B) the system ran OK for a year.
So, it looks like the original DVR adapter dropped efficiency over time and stopped putting out enough juice to power the HDD. It's now happily powering my PTZ camera, which must draw < 500mA, the same as the other PTZ.
I love forums!
Thanks Mick & Mike.
