![Dynamic Dynamic](/uploads/1/2/6/8/126879104/888805624.png)
The topic of quorum in Microsoft Failover Clustering often gets very little mention. Quorum guides the actions of surviving nodes when there are system-level failures. This technology has evolved substantially over the last few versions of Windows/Hyper-V Server and many are not aware of the changes. The cluster quorum is the majority of voting nodes in the active cluster membership plus a witness vote. A quorum witness can be a designated disk witness or a designated file share witness. No majority (disk witness only) No nodes have votes. Only a disk witness has a vote. The cluster quorum is determined by the state of the disk witness. Microsoft 70-412 Course Exam. Server1, Server2, and Server3 are configured as the preferred owners of the cluster roles. Dynamic quorum management is disabled. Which volume is the best candidate for a witness disk for a Failover Cluster? FAT32 Basic Disk B. FAT32 Dynamic Disk C. NTFS Basic Disk. The Dynamic Quorum is enabled by default since Windows Server 2012. In the below example, there is a four-node cluster on Windows Server 2016. But it is the same behavior. I verify if the dynamic quorum is enabled and also the dynamic witness: The Dynamic Quorum and the Dynamic Witness are well enabled. The option to convert the disk from basic to dynamic is unavailable in Disk Manager after you configure a disk that is recognized by Windows 2000 or Windows Server 2003 to be a server cluster disk. Dynamic disk configuration unavailable for server cluster disk resources. 171052 Software FT sets are not supported in Microsoft Cluster Server.
Microsoft Cluster Quorum Dynamic Disk Vs Basic Disk Performance
To move the MSCS Quorum from a Microsoft Windows basic disk to a SFW dynamic disk in an SFW Cluster dynamic disk group, follow the below procedure:
1. Launch the Veritas Enterprise Administrator (VEA) and create a Cluster dynamic disk group. For detailed steps to create a SFW Cluster dynamic disk group and an SFW Dynamic mirrored volume, please refer to the Storage Foundation for Windows Administrator's Guide in the Related Documents section below.
Note: For redundancy, Veritas recommends using three small disks to mirror the quorum volume (this will provide three mirrored copies, or a three-way mirror); a minimum of two disks is required (this will provide two mirrored copies, or a two-way mirror). Microsoft recommends 500MB for the quorum volume.
2. From Cluster Administrator,
3. Create the Quorum resource,
4. When the New Resource dialog box appears, specify a name for the quorum resource (QuorumDG) and, if necessary, add a description about the resource.
5. Select
6. Select
7. Click
8. In the Possible Owners dialog box, click
9. In the Dependencies dialog box, click
10 When the Volume Manager Disk Group Parameters dialog box appears, select the Cluster dynamic disk group created in step 1 above.
11. Click
11. Bring the newly added resource online.
12.
13. Select the
14. Select the name of the quorum resource created in step 3 above.
15. Click
1. Launch the Veritas Enterprise Administrator (VEA) and create a Cluster dynamic disk group. For detailed steps to create a SFW Cluster dynamic disk group and an SFW Dynamic mirrored volume, please refer to the Storage Foundation for Windows Administrator's Guide in the Related Documents section below.
Note: For redundancy, Veritas recommends using three small disks to mirror the quorum volume (this will provide three mirrored copies, or a three-way mirror); a minimum of two disks is required (this will provide two mirrored copies, or a two-way mirror). Microsoft recommends 500MB for the quorum volume.
2. From Cluster Administrator,
Start > Control Panel > Administrative Tools > Cluster Administrator
, verify that the MSCS Cluster Group is online on the same node where the SFW Cluster dynamic disk group that created above is imported. 3. Create the Quorum resource,
right-click
the Cluster Group, select New
, and select Resource
.. 4. When the New Resource dialog box appears, specify a name for the quorum resource (QuorumDG) and, if necessary, add a description about the resource.
5. Select
Volume Manager Disk Group
from the Resource type list. 6. Select
Cluster Group
from the Group list. 7. Click
Next
. 8. In the Possible Owners dialog box, click
Next
. 9. In the Dependencies dialog box, click
Next
. Dependencies are not needed for a quorum resource. 10 When the Volume Manager Disk Group Parameters dialog box appears, select the Cluster dynamic disk group created in step 1 above.
11. Click
Finish
. 11. Bring the newly added resource online.
12.
Right-click
the Cluster name in the configuration tree and select Properties
. 13. Select the
Quorum Tab
of the Cluster Properties window. 14. Select the name of the quorum resource created in step 3 above.
15. Click
OK
to complete the operation.