thanks for the info f42,
the part about booting up empty with a 1 red light should be ok, though i was wondering about the “required portion of dashboard no longer running”, as maybe tackling that first could be good…
i say this because as far as i know, an empty working drobo should be found by dashboard (as long as nothing is causing dashboard problems etc)
this article mentions some firewall changes likely in mac v10.7, but might be worth a look in case anything similar applies for you, and you might be able to check the same ones to help dashboard to be given the right permissions to run properly:
(usually on windows, we need to restart the service or allow it to communicate with the drobo if we get that message, so maybe for you a tweak of those settings can help it to find the drobo?)
the recent message you mentioned about “a disc inserted was not readable” sounds similar to this one, and if so its probably best to just click ignore on that as per here:
For the drives (1 & 3) which were flashing red, that might possibly indicate problems with those drives, but am not yet sure if the usual process (of replacing a flashing red drive with another one if it happens during normal operation) applies here, since it is not operating normally at this time.
if you are able to try the same kind of tests as you recently did before, but hopefully with dashboard being able to communicate with your empty drobo, does it now find it?
if it does, then that is a good sign at least from a hardware perspective, and you could try putting the drobo into ReadOnly mode, which may have a chance of stabalising its boot up, to let you access the current data on it, as mentioned in this post:
(usually it is for reboot/loops, where it has worked successfully, but it might work for you, and i think is a good next step before moving onto raising a ticket, or drive work)
btw you might not be using it though there is also a knowledgbase article here with lots of info about iscsi too in case useful:
can i also check if you can remember if your drobo was using Single drive redunancy (SDR) or dual (ddr)?