OpenShift 4.14.x (4.14.20) reporting Dell PowerEdge C6615 node’s four 960GB SATA Solid State Disks as removable and subsequently refusing to continue installation of OpenShift on to at least one of those Disks.
This issue is where by OpenShift agent installer reports installed SATA SDDs are removable and refuses to use any of them as installation targets.

Linux Kernel reports:
sd 4:0:0:0 [sdb] Attached SCSI removable disk
sd 5:0:0:0 [sdc] Attached SCSI removable disk
sd 6:0:0:0 [sdd] Attached SCSI removable disk
sd 3:0:0:0 [sda] Attached SCSI removable disk
Each removable disk is clean, 894.3GiB  free space, no partitions etc.

However - Insufficient
This host does not meet the minimum hardware or networking requirements and will not be included in the cluster.
Hardware: 
Failed     
  Warning alert:    
    Insufficient        
Minimum disks of required size: No eligible disks were found, please check specific disks to see why they are not eligible.

    

   4.14.z 

    100 %

    1. Create install and agent config
    2. Generate ISO
    3. Boot the ISO on dell HW mentioned in description
    4. Observe journal logs for disk validations
    

    Installation fails at disk validation

    Installation should complete