pass-through devices on an ESX host:Select an ESX host from the Inventory panel of VMware Infrastructure (VI) Client.On the Configuration tab, click Advanced Settings. The Pass-through Configurationpage lists all available pass-through devices.Note: A green icon indicates that a device is enabled and active. An orange icon indicates that the state of the device has changed and the host must be rebooted before the device can be used.Click Edit.Select the devices and click OK.Note: If you have a chipset with VT-d, when you clickAdvanced Settings in VI Client, you can select what devices are dedicated to the VMDirectPath I/O.When the devices are selected, they are marked with an orange icon. Reboot for the change to take effect. After rebooting, the devices are marked with a green icon and are enabled.Note: The configuration changes are saved in the /etc/vmware/esx.conf file. The parent PCI bridge, and if two devices are under the same PCI bridge, only one entry is recorded.The PCI slot number where the device was connected is 00:0b:0. It is recorded as:/device/000:11.0/owner = passthruNote: 0b is 11 in decimal.To configure a PCI device on a virtual machine:From the Inventory in VI Client, right-click the virtual machine and choose Edit Settings.Click the Hardware tab.Click Add.Choose the PCI Device.Click Next.Note: When the device is assigned, the virtual machine must have a memory reservation for the full configured memory size.:2- Adding a Tape Library/Drive as a SCSI device to the VM running on ESX/ESXi.The below instruction are coming from VMware KB Article: 1016407.To configure a tape device with a virtual machine in ESX 4.0 and ESX 4.1:Consult your backup hardware and software vendor to ensure that your tape device and backup software are supported to work with VMware ESX 4.0 and ESX 4.1. For more information, see the Additional Information section in this article.Configure the tape device and controller according to the hardware vendors guidelines.Connect VMware vSphere Client to the VMware vCenter Server or VMware ESX host.Click on the VMware ESX host which has the hardware connected.Click Configuration tab > Storage Adapters.On the Storage Adapters list, identify the controller which has the tape attached.Under Details, record the Runtime Name of the tape device. For example, vmhba2:C0:T1:L0.Select the virtual machine that will use the tape device, and click Summary tab > Edit Settings....Click the Hardware tab > Add....Select SCSI Device from the list of device types and click Next.Select the appropriate device from the SCSI Device drop down list.Select the Virtual Device Node which matches the Adapter and Target of the Runtime Name of the device, as recorded in step 6. The Virtual Device Nodes are denoted as:. For example, the Runtime Name vmhba2:C0:T1:L0 corresponds with a Virtual Device Node of (1:1), (2:1), or (3:1).Note: For more information about theRuntime Name, see Identifying disks when working with VMware ESX (1014953).Warning: For clarification, (0:1) is also available for configuration. However this bus is usually already populated by a virtual disk in a typical virtual machine setup. As tape operations by nature are quite disruptive for devices on the same bus, to avoid interruption, ensure the tape devices target