Virtual TapeServer 6.04.01 Operations and Administration Guide

Modifying Virtual Tape Drives | 19

The appropriate ID value depends on the host server:

• For NonStop S-series servers

IDs 4 and 5 are reserved for tape devices, while other IDs are reserved for other

device types. NonStop S servers default to target ID 5 for tape drives, therefore it

is recommended that you select 5 from the target drop-down list. You can select 4

as the target ID but you must configure the NonStop S server by specifying

“DEVICEID 4” with the SCF ADD TAPE command. (Refer to the NonStop S

server documentation for more information.)

• For NonStop Integrity (NS) and BladeSystem servers

In general, you can assign values 0–15 to the target ID. (Integrity servers support

Fibre Channel ports only.) Best practices encourage you to assign value 5 to the

target ID.

• UNIX servers

In general, any ID greater than 0 can be used for the target ID. The backup

management application determines the ID and typically assigns 0 to the robot in

a tape library. Refer to backup management application documentation and host

server to determine the target ID.

If the Fibre Channel is configured for the Arbitrated Loop topology, use the Loop

ID as the target ID here. To find the Loop ID, boot VTS while connected to the

Fibre Channel network. Then, after the startup is complete, access the VTS web

interface. Click Supervisor Functions on the navigation pane, click Examine

the system log file, and search for “Loop id.” The ID is typically set to 0 or 1 but

it can be set as high as 255.

f. From the lun drop-down list, select the logical unit number. This number identifies

the sub-ID on the bus, and this ID typically ranges from 0 – 255. The appropriate

LUN value depends on the host server. For SCSI connections, this ID is 0 typically;