My Drobo S (2 Gen) is stuck in read-only mode. It is 10 years old but still has plenty of spare capacity (4.69 TB free - 74 %). Dashboard is running on 3.5.2. It’s linked to my iMac, which is of a similar age and running on High Sierra (10.13).
The problem first came to light with the failure of Time Machine back-ups (message being: unable to update, disk needs reformatting etc). I can read files but no longer create or update them, and there also appears to have been some data loss. Have tried system shutdown and re-start, but to no effect. Drobo Support advised re-installation of dashboard software (3.5.1) - which I notice seems to be a standard response for MacOs 10.13 - but, again, no effect. I sent them the diagnostic report that can be generated from the dashboard, but it’s unclear whether that was investigated.
My hunch is that this isn’t due to any Drobo disk failure, but the problem does lie in the Drobo rather than Mac area. I have seen some reference to DiskWarrior, which I believe is a directory repair tool, but is this a recognised and safe tool for any Drobo repair ? Would it be better just to get another Drobo ? But can the drives be transferred without data loss/erasure ? Or maybe the machines could be linked (one read-only, the other for updates) ?
Anyway, I’d appreciate any advice you guys can give me on next steps.