I think what bhiga was getting at is a kernel panic can be an utter fluke, never to happen again. Sometimes things just crash. I haven’t seen one in years, but as long as it doesn’t happen again, I wouldn’t worry. If it happens a second time, then start investigating.
whenever theres a power cut or reboot etc,
i always run a chkdsk (windows) on the drobo, one volume at a time and without any other programs specifically accessing it. Usually it corrects a few things nice an early, but sometimes even chkdsk gives an all clear (which is nice)
if you are not sure what to use on a mac for checking the filesystem, please say so or research first, as there are some tools out there which can do more harm than good i believe.