My five and a half year old 1000s is now reporting no HDD it had been up dated with 2TB WD AV drive about 5 years ago.
Unfortunately the other day it paused a recording and then rebooted with no recordings available after that, unplugged it and the recordings returned. A couple of days later it did it again but left me with a blank screen and I haven't been able to get recordings back this time and it thinks no hard drive is connected in settings. Not once did it ask me to format the hard drive and obviously I can't now. (Tried a reset of course)
I had still been getting the occasional reboot possibly that was a sign that something wasn't quite right.
Any guesses as to whether it is the box or HDD, fingers crossed it is the HDD.
So I presume when I have the time I need to remove the HD and check to see if my laptop can see it and pop another HDD in to the box to see if that formats and works okay. (Unfortunately I haven't got a spare HDD, they all have stuff on them)
So for now I'm back using my 2008 Foxsat HDR (with 1Tb WD AV), luckily it is still going as I don't want to buy another box.