Determining Scsi And Fibre Channel Ids; Scsi Drive Ids; Fibre Channel Drive Ids; Module - IBM System Storage TS3310 Setup And Operator Manual

resources and improve overall performance. Further, Data Path Failover provides
autonomic self-healing capabilities similar to Control Path Failover, with
transparent failover to an alternate data path in the event of a failure in the
primary host-side path. Data Path Failover and Load Balancing for Ultrium 3 Tape
Drives requires an optional feature.
Currently Data Path Failover is not available on Windows with Ultrium 3 tape
drives. Data Path Failover is also not available on HP-UX at this time.
The Data Path Failover feature is activated by a license key. For ordering
information, see Chapter 12, "Parts List," on page 12-1.
For additional information, refer to your device driver documentation.

Determining SCSI and Fibre Channel IDs

SCSI IDs are required for SCSI drives. Loop IDs are required for Fibre Channel
drives.

SCSI Drive IDs

Based on its physical position in the library, each SCSI tape drive is assigned a
default SCSI ID (from 0 to 13). The table below lists the default SCSI IDs.
Note: You can change a SCSI ID by using the Web User Interface or the Operator
LUN Assignments for Ultrium Tape Drives
The logical unit number (LUN) for the Sequential Access device is always LUN 0
of the drive, and the LUN for the Medium Changer device is always LUN 1 (all
other LUNs are invalid addresses). These devices are compatible with the SCSI-3
standard. For information about the SCSI commands for the tape drive and the
library, see the IBM TotalStorage LTO Ultrium Tape Drive SCSI Reference and the IBM
System Storage TS3310 Tape Library SCSI Reference.
Note: The Medium Changer SCSI ID is the same as the SCSI ID for the control

Fibre Channel Drive IDs

Each Fibre Channel Ultrium Tape Drive in the library must have a Loop ID and
corresponding Arbitrated Loop Physical Address (AL_PA) to communicate in a
2-4
TS3310 Tape Library Setup and Operator Guide
Table 2-1. Default SCSI ID for each SCSI drive in the library

Module

Position
Control

Drive 1

Module
Drive 2
9U Drive 3
Expansion
Drive 4
Module
Drive 5
Drive 6
Panel.
path drive. You can enable additional drives to optionally provide Medium
Changer (LUN 1) addressing by configuring more than one logical library or
by enabling additional control paths (see "Determining the Number of
Logical Libraries (Partitions)" on page 2-1.
Drive Location Coordinate
0, 1
0, 2
-1, 1
-1, 2
-1, 3
-1, 4
Default SCSI IDs
2
1
6
5
4
3