It's more a theoretical question than anything else - Say this outage had gone on for days, I'd have needed to be able to see which volumes have failed and drop

It's more a theoretical question than anything else - Say this outage had gone on for days, I'd have needed to be able to see which volumes have failed and drop them from the array. How can I do that when I can't view the raid status? I have these problems even If I purposely detach a volume to test.