Pass-Through Disks or Physical RDM LUNs Disappear with HPE Storage Toolkit in a VM Environment
Whether or not VSS snapshots are being used, installing the toolkit on a Hyper-V or VMware virtual machine (VM) may cause the pass-through disks or physical RDM LUNs to disappear.
As a workaround, you can enable VSS Requestor/Provider running in a Hyper-V or VMware VM environment to support snapshots of pass-through disks or physical RDM LUNs and prevent DSM from claiming the pass-through or physical RDM LUNs in an iSCSI environment.
For Hyper-V VMs, see Microsoft Knowledge Base article 3011079.