I came home to the R4 off. I powered it up and the one drive configured as a PassThru is still there but the other drive that had been part of a mirror (the third drive died a month ago) has "devolved" to Unconfigured. It's as though everything about that original Disk Array / Logical Drive has been lost.
I have a backup so it's just annoying but I would like to understand what has happened. Why would the Disk Array / Logical Drive info be dumped without the disk going bad? Or did it go bad and that information was dumped when then the R4 turned off? Thanks!