Till my last FW+DD update, I was able to use on my Drobo v2 this drobologdecrypt.rb Ruby script to get the log in clear.
But now, with FW=1.4.2 and DD=2.2.1 it does not work anymore.
Was anybody able to decrypt the new format Log with the latest FW+DD versions ?
It is a real pain, Drobo users having asked FOR YEARS a log in clear, and still zero answer… 
And by changing the obfuscation algorithm once again, they seem to have made their point clear that they don’t intend to, didn’t they? 
Ugh. I was afraid this might happen some day.
Log files for both the Drobo S and the DroboPro are encrypted (not just obfuscated, but actually resistant to utilities which look for known strings). I didn’t notice, from the header, what type of encryption they use.
Firmware files for both also appear to be encrypted. I could use tools like binwalk to pick apart the firmware files for the 4-bay, but I find only binary mess in looking at the firmware updates for Drobo S and DroboPro.
It certainly does seem like Drobo has made their decision.
i saw some decoded logs before, they actually look really cool and have ascii art to show graphs of various things.
pretty cool stuff