The failover clustering feature ensures high availability of a service by using multiple servers (nodes) that can make it work.
Some examples of services that can be used with the Failover Cluster feature:
- 2 servers minimum having the same hardware and software configuration.
- Nodes must be members of the same Active Directory domain.
- A SAN type of storage which presents to all the servers the same LUNs.
- A storage type SAN with a volume of 1 to 10 GB that will serve as a quorum.
- Recommended: A network adapter dedicated to the cluster.
Configuration of the control disk (Quorum)
Quorum is a very important element of the Failover Cluster, it has 2 main functions:
- Maintain online cluster maintaining a sufficient number of voters
- Contains a copy of the cluster configuration.
More information on quorum : https://docs.microsoft.com/fr-fr/windows-server/storage/storage-spaces/understand-quorum
The quorum configuration must be done on one of the nodes of the future failover cluster.
1. Present a LUN from 1 to 10GO to all nodes.
2. Open the Disk Manager. Right click on the disk and click on Online 1.
3. Right-click on the disk again and click Initialize Disk 1 .
4. Click OK 1 .
Right click on the disk and click on New Simple Volume. This one must be formatted in NTFS and with the letter Q.