All,

Good day.

We had outage couple of days ago and our cluster disk went offline. When analyzing the logs with Microsoft, they said we need to diasble Persistent Reservation  flag.

Microsoft comments “This mostly happens due to a persistent reservation present on the disks which does not allow the clusdisk.sys to perform I/O operation on the cluster disks and blocks it. This also prevents failover to other nodes.

Action Plan:

1. Engage the Storage vendor and ask them to remove the persistent reservations on the cluster disks.”

  Microsoft keep saying to engage Storage vendor and storage vendor saying is done from host.

Any thoughts would be appreciated!

Thanks,

Naveen