Fix null disk group crash in OSA vSAN clusters (#113)

Guard Get-VsanDisk against a null VsanDiskGroup parameter, which occurs
when an OSA cluster has no claimed disks. The cluster detail table now
renders correctly; Disk Groups and Disks subsections are skipped when
no disk groups exist.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tpcarman

AsBuiltReport.VMware.vSphere/Src/Private/Get-AbrVSpherevSAN.ps1

@@ -235,8 +235,10 @@ function Get-AbrVSpherevSAN {
                                             # Get vSAN Disk Groups
                                             $VsanDiskGroup = Get-VsanDiskGroup -Cluster $VsanCluster.Cluster
                                             $NumVsanDiskGroup = $VsanDiskGroup.Count
-                                            # Get vSAN Disks
-                                            $VsanDisk = Get-VsanDisk -VsanDiskGroup $VsanDiskGroup
+                                            # Get vSAN Disks (guard against null disk groups — e.g. unclaimed OSA cluster)
+                                            if ($VsanDiskGroup) {
+                                                $VsanDisk = Get-VsanDisk -VsanDiskGroup $VsanDiskGroup
+                                            }
                                             $VsanDiskFormat = $VsanDisk.DiskFormatVersion | Select-Object -Unique
                                             # Count SSDs and HDDs
                                             $NumVsanSsd = ($VsanDisk | Where-Object { $_.IsSsd -eq $true } | Measure-Object).Count

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fix null disk group crash in OSA vSAN clusters where disk groups have not yet been claimed ([#113](https://github.com/AsBuiltReport/AsBuiltReport.VMware.vSphere/issues/113))
 - Fix `An item with the same key has already been added. Key: LinkedView` error when generating TEXT format reports ([#130](https://github.com/AsBuiltReport/AsBuiltReport.VMware.vSphere/issues/130))
 - Fix "Index operation failed; the array index evaluated to null" crash and `Global.Licenses` privilege errors when querying ESXi host/vCenter licensing on vCenter 8.0.2 ([#123](https://github.com/AsBuiltReport/AsBuiltReport.VMware.vSphere/issues/123))