All my data was wiped at 00:00:01.. Have I been hacked?

Hi all. A few weeks back I noticed that my ReadyNAS RN104 was showing 99% capacity, which I knew was wrong.
I fired up RAIDar and sure enough, my box was empty.
Some time ago I had a HDD failure on the same unit which I wrote about in this topic, where one disc got redundant, and when putting in a new disk another failed at the exact same time, thus me loosing all my data.
I bought yet another HDD and everything has been fine up until this new problem; everything is gone without a trace.
My log tells me that my system restarted at 00:00:01 on october the 6th, and when I check the system log, I get a lot of activity around this time period, but I have no idea where to even start to look for clues about what has happened...

SMART says no errors as far as I can see, all 4 disks has 0 uncorrectable sector counts.

I am sorry to say that loosing my data 2 times in a fairly short amount of time has led me to loose all my trust in Netgear storage devices, so I have now bought myself a home server instead.
But I would very much like to figure out what happened! Was there a glitch in the matrix? OS crash? Have I been hacked (because it almost looks like it to me....)

So would anyone be willing to check a log file or three for me? And please tell me which one to share, because I have no clue where to start.

Thanks!