Support for dynamically adding and removing pass-through disks on Hyper-V virtual machines

SnapDrive supports the feature introduced in Windows Server 2008 R2 that enables you to add or remove a pass-through disk on a Hyper-V virtual machine without shutting down that virtual machine. This is sometimes called the hot add and remove feature.

A pass-through disk is a disk that is physically connected to a Hyper-V parent host and is assigned to a Hyper-V virtual machine as a SCSI hard disk for use by that virtual machine.

The following configuration requirements must be met to use this feature:

You must be using Windows Server 2008 R2.
.NET 3.5 SP1 or higher must be installed on the Hyper-V parent hosts.
A version of SnapDrive that supports the dynamically adding and removing pass-through disks must be installed on all Hyper-V parent hosts and on all targeted Hyper-V virtual machines.
Data ONTAP 7.3.1 or later must be installed on the storage system.
If iSCSI is used for the pass-through disk, the iSCSI groups must already be configured and the iSCSI session between the storage system and the Hyper-V parent host must already exist.
The SCSI contoller must be added to target virtual machines in advance.
Adding a SCSI controller requires virtual machine downtime.
The Hyper-V parent host and the virtual machine must have TCP/IP network communication to all parent hosts and vice versa.
A virtual machine must not have MPIO enabled.

Note: If you uninstall SnapDrive for Windows, all SnapDrive registry key entries are removed from your Windows host. If you reinstall SnapDrive, you must reconfigure pass-through disks.