• Introduction




    This document describes how to configure the following hosts to access Fibre Channel (FC) or iSCSI storage provisioned on a system running the latest operating environment:

    • Windows hosts
    • AIX hosts
    • Citrix XenServer hosts
    • HP-UX hosts
    • Linux hosts
    • Solaris hosts

    This document is intended for those who are responsible for setting up host to access storage.

    Readers of this document should be familiar with FC or iSCSI LUNs and with the operating system running on the hosts that will access the LUNs.

    The Unisphere online help provides specific information about storage, features, and functionality. The online help and a complete set of documentation are available on Online Support.

    Note:  Unless otherwise noted in this guide, "Windows Server" refers to the following versions:
    • Windows Server 2008 R2
    • Windows Server 2012
    • Windows Server 2012 R2
    • Windows Server 2016

    VSS HW Provider overview

    The VSS HW Provider runs as a Windows service and provides the interface between the Microsoft Volume Shadow Copy Service (VSS) and your storage system. The VSS HW Provider enables VSS requestor applications, such as VSS-enabled backup applications, to make snapshots of iSCSI and FC LUNs.

    Microsoft VSS

    VSS provides the backup framework for Windows Servers, and enables the creation of snapshots (called shadow copies for Microsoft VSS) — point-in-time copies of data. VSS is integrated with front-end applications so they can create and access shadow copies.

    The VSS architecture includes VSS providers. A VSS provider creates and maintains shadow copies and acts as the interface to point-in-time imaging capabilities either on a storage platform (hardware-based provider) or in a host operating system (software-based provider). The Unity VSS HW Provider is a hardware-based provider that works directly with iSCSI and FC LUNs on the Unity iSCSI and FC interfaces and with the VSS service on Windows Servers hosts to provide consistent shadow copy creation and addressing.

    Because the Unity VSS HW Provider is a hardware-based provider, it reduces the load on the CPU and memory of the host. It is also more efficient in an environment where shadow copies of multiple volumes must be taken simultaneously.

    Refer to the Microsoft documentation for more information about VSS.