Concern: Production down; Can log in but getting a blank screen or a server error
Date: 24th Oct:
Time: 11:35 AM PST to 04:22 PM PST
Cause: Database 1 and 3 disk drive were not accessible, due to which cluster were not able to move
Correction: Verizon restarted the database and cluster

Root cause ticket open with Verizon, Below is the reply from Verizon Engineer
“Created Microsoft case for this as well, as I see no obvious reason for this cluster behaviour. Also we will go through the logs to get the bottom of this”