Virtual TapeServer 6.03.41 Operations and Administration Guide

11
Modifying Virtual Tape Drives
You may need to modify one or more virtual tape drives, particularly those that were
preconfigured on VTS. You may need to rename virtual tape drives according to your chosen
naming convention. This section describes how to modify virtual tape drive properties.
When adding or modifying a virtual tape drive in VTS, you must define its properties. The
following table describes the properties and specifies whether each property is presented to
the NonStop server host when the virtual tape responds to a host’s query:
Property Description
Presented
to Host?
Bus ID The ID of the bus to which the host is connected Yes
Target ID The SCSI ID on which the virtual tape device responds Yes
Logical unit
number (LUN)
The sub-ID on the bus Yes
Initiator ID The SCSI ID of the host Yes
Name A user-friendly name for the virtual tape device No
Media type The type of tape drive that the virtual tape device
emulates
Yes
Host type The type of host (NonStop S server, NonStop Integrity
server, UNIX server, or Windows server)
No
Serial number The serial number or other string describing the virtual
tape device
Yes
The first four properties are collectively referred to as the BTLI of the virtual tape drive. The
BTLI enables the host to precisely identify the virtual tape connection; it provides an exact
address of the virtual tape’s location on the bus. Remember that the host is connected to VTS
by a single cable. The BTLI thereby enables you to multiplex the cable (for hosts connected to
VTS by a Fibre Channel cable), to identify multiple (virtual) tapes over a single Fibre Channel
cable.