Andy, you can open a support ticket and submit your logs to DRI. They should be able to tell from the logs if there’s a drive issue cropping up.
On a Drobo+DroboShare, since the DroboShare handles the filesystem access, you can think of it as the “computer” in the Drobo+computer scenario, so the same rules apply. If the DroboShare loses power unexpectedly, or loses connection to the Drobo unexpectedly, filesystem issues can occur.
C) “Failures” can occur in both the hardware and the software:
Data loss can result from failures at the hardware level (i.e. you drop your Drobo out the 22nd floor window) and at the software level (i.e. a file system corruption). Routinely verifying and error-checking all data and file systems is a critical part of best practices for all systems. Please note the tools and utilities you use will vary by operating system, but every major operating system comes pre-loaded with at least basic disk checking tools.