Virtual TapeServer 6.04.02 Operations and Administration Guide

Modifying Virtual Tape Drives

You may need to modify one or more virtual tape drives (VTDs), particularly those that were

preconfigured on VTS. You may need to rename VTDs according to your chosen naming

convention. This section describes how to modify VTD properties.

Note If you delete the VTD, you must restart the TapeServer service.

The following table describes the properties that you must set when defining the 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 first four properties 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.

Property Description

Presented

to Host?

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

Initiator ID A unique identifier used by VTS to distinguish streams

originating from the same host.

Name A user-friendly name for the VTD. Yes

Media type The type of tape that the VTD emulates. Yes

Host type The type of host server. No

Serial number The serial number or other string describing the VTD. Only

alphanumeric characters should be used.

Yes