I have a 4 bay drobo with USB2 and Firewire. I think its a Gen 2 Drobo.
I’ve been running 2 2TB drives and 1 1.5TB drive for years, with one bay empty. About a month ago one of my 2TB drives died.
So I ordered [urhttp://www.amazon.com/Western-Digital-Caviar-Desktop-WD20EARS/dp/B002ZCXK0I]two new ones from Amazon - both are 2TB WD Green[/url].
I replaced the bad drive with one of the new drives and waited several days for the data protection process to finish. When I had 3 green lights, I installed the fourth drive. That green light came on almost instantly.
Everything seemed fine for about 2 weeks, then suddenly yesterday all the lights turned red. I checked the drobo monitor and it only shows the 2 old drives as being online. The 2 new WD drives both looked like they were not installed.
In a panic, I ejected the drives and re-installed them. The drobo is now in it’s data protection process again (which I expect to take a few days the way it did the first time).
Note that I have NOT put any new data on the Drobo as this is just an archive server. I have only used around 3TB of space.
The question is, did I lose all of my data?
Is this a common problem? How could I have two new drives fail simultaneously?