Windows Cluster issue - Quorum Disk online but absent

Can you add Storage to the cluster to bring it back in?  If you right click on the Cluster and choose to reconfigure the Quorum and choose a disk, will it pull it back in the cluster group?

I have reconfigured Quorum disk many a times, but it still does not show up in Windows cluster. It is already part of the cluster group, but not a healthy Quorum disk.

As mentioned earlier, the disk error is "OpenPartitionFailure".

Adding a brand new disk to cluster as a fresh Quorum Disk did not help. Thanks.

If you run Get-Disk in powershell on the node with the quorum disk on it, do you see the disk and what is the type of disk?

This is the output of Get-Disk
Number Friendly Name Serial Number                    HealthStatus         OperationalStatus      Total Size Partition
                                                                                                             Style    
------ ------------- -------------                    ------------         -----------------      ---------- ----------
0      VMware Vir... 6000c29a8c133ed261d7107d89f4fc8c Healthy              Online                     300 GB MBR      
5      COMPELNT C... 000583c2-00000013                Healthy              Online                     200 GB MBR      
6      COMPELNT C... 000583c2-00000014                Healthy              Online                       2 TB MBR      
2      COMPELNT C... 000583c2-00000010                Healthy              Online                       1 GB MBR  
3      COMPELNT C... 000583c2-00000011                Healthy              Online                     1.2 TB MBR      
4      COMPELNT C... 000583c2-00000012                Healthy              Online                     600 GB MBR  

The 1 GB disk is the Quorum disk.

Sounds like there is something wrong for the partition on the disk. Hard to tell.  If you run Get-Partition for DiskNumber 1? What is there?

Disk #1 is the second fresh Quorum disk I added yesterday. I have taken it offline since it did not help.  Here is the output of Get-disk command which I had omitted previously:

1      COMPELNT C... 000583c2-0000001b                Healthy              Offline                      1 GB MBR

Get-partition shows this for the Quorum disk (J:):

   DiskPath: \\?\Disk{85bf95e3-f896-c760-154b-cbaecdd743fd}

PartitionNumber  DriveLetter Offset                                        Size Type
---------------  ----------- ------                                        ---- ----
1                J           65536                                      1021 MB IFS

There is really only one reason I can think of that the quorum disk is not found, is that the drive is not available on all nodes of the cluster. Did you run a cluster test for storage?

Have run Cluster Validation many times. The storage section shows no error. When I shutdown one node, all disks, including Quorum Disk, show up on the other node.
Validation report has this Warning; "The Core Cluster Resource Group does not contain a file share witness or a disk witness. This is a required resource for the group."
Thanks.

That is what it seems is that the drive that you want to use for the Quorum, seems to not be able to be seen by both nodes or it would show up in the Add Storage from the Disks.

It is already added in Storage. I also added a brand new disk for Quorum, but it did not improve things.
I am thinking of giving this command:
Could it help? Thanks.