Virtual TapeServer 6.04.03 Operations and Administration Guide

17
Modifying Virtual Tape Drives
You may need to modify one or more virtual tape drives (VTDs), particularly those that were
preconfigured on Virtual TapeServer (VTS). You may need to rename VTDs according to your
chosen naming convention. This section describes how to modify VTD properties.
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 13 for more information.
The following table describes the properties that you must set when defining a 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 bus ID, target ID, LUN, and initiator ID (not shown) are collectively referred to as the
BTLI. The BTLI enables the host server to precisely identify the VTD; it provides an exact
address of the VTD on the bus. Remember that the host is connected to VTS by a single cable.
The BTLI thereby enables you to multiplex the cable to identify multiple VTDs over a single
cable (for Fibre Channel VTDs).
The following describes how to modify a VTD using the Manage Connections page. You can
also modify VTDs using the links provided on the page that is displayed when you click
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
Bus ID The ID of the bus on the VTS server to which the host is
connected. This ID is not presented directly to the host; the
host will see this bus numbered according to its numbering
scheme. If the connection is over Fibre Channel, the bus 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
bus 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 bus. 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