Spurious critical errors

My Drobo 2nd gen on latest firmware occasionally complains my data is at risk and then goes back to normal after a few minutes. This is getting annoying, i.e. getting the emails and then look to see it working with all green lights later. Anyone know what is causing this?

Could be one of your drives timing out, then starting to respond again.

It is something to definitely be concerned about. Open a support case and send in your log file and they will tell you why it is doing this.