After I powered off my Drobo, which was (apparently) working fine before, when I plugged the power back on, the Drobo seemed to boot normally (bottom blue dots progressing right) up to the point when I should have lighted all the 4 right disk leds to green… but they all turned red and stayed so.
Then the Drobo started to reboot, and repeated the same cycle over and over again.
I tried to power off/on again : no dice.
I tried to replace the power brick with a spare one I had : no dice.
Tried to power off, unplug all 4 disks, power on/off, replug them, power on : no dice.
Apparently the Drobo Pro suffered from something very similar, I hope my latest firmware update did not bring that plague to my Gen 2 one.
Since the Drobo is not seen from the Mac, I cannot even get a log.
Anybody with an idea ?
Thanks rdo, no initially it did not boot when empty.
Thanks mgriffin34, I did not try that but since I found this Drobo support page “What should I do if my Drobo storage device keeps rebooting?”, and following it religiously step by step, I was able to recover all my disks.
I am glad everything ended happily (apparently), but I still find the Drobo susceptibility to power offs worrisome, since it is not the first such problem I had, although previous ones were not so persistent.