Virtual TapeServer 8.0 Configuration Guide

Creating and Managing VTLs and VTDs | 25
The following table describes the properties that you must set when defining a standalone
VTD. For each property, this table provides a description and whether each property is
presented to the host server when VTS responds to a host’s query:
The port ID, target ID, LUN, and initiator ID (not shown) are collectively referred to as the
PTLI. The PTLI enables the host server to precisely identify the VTD; it provides an exact
address of the VTD on the port. Remember that the host is connected to VTS by a single cable.
The PTLI thereby enables you to multiplex the cable to identify multiple VTDs over a single
cable (for Fibre Channel VTDs).
Note It is recommended that you back up the VTS database before and after modifying the
VTS configuration. See Backing up the VTS server on page 119 for more information.
You can create standalone VTDs, and then you can modify or delete VTDs as needed.
Creating a standalone VTD
The following procedure describes how to create a VTD using the Configure Virtual Devices
page. The full procedure is documented in the online help, which is accessed by clicking the
Help button on the Configure Virtual Devices page of the VTS web interface.
Note At least one port must be set to Virtual (target) mode on the Configure Virtual
Devices page before you can create a VTD. Ports should have been configured as
described in the help.
Property Description
Presented
to Host?
Name A user-friendly name for the VTD. Yes
Tape type The type of tape that the VTD emulates. Yes
Port ID The ID of the port on the VTS server to which the host is
connected. This ID is not presented directly to the host; the
host will see this port numbered according to its numbering
scheme. If the connection is over Fibre Channel, the port ID
is associated with a port WWN that is used by the host to
identify the VTS server. If the connection is over SCSI, the
port ID on the VTS server has no significance to the host.
Indirectly
Target ID The SCSI ID on which the VTD responds. This ID is not
presented to the host if the connection is over Fibre
Channel.
Yes, for
SCSI only
Logical unit
number (LUN)
The sub-ID on the port. This ID is used by the host for SCSI
and Fibre Channel connections.
Yes
Serial number The serial number or other string describing the VTD. Only
alphanumeric characters should be used.
Yes