Drobo-FS failing drive or not?

I keep getting email alerts that my Drobo had a critical alert and cannot currently protect my data against hard drive failure.

Then I get Data protection is in progress, but you may continue accessing your data. Do not remove any hard drive.

All 5 of my drives are green, I have never seen any other color. I’d like to replace the drive that is failing before it actually finally fails.

How do I tell which drive is failing?

hi if you can raise a ticket with support, you could try to take a diagnostics log for them, as it might help show if a particular drive is having problems