Chapter 4: Understanding San Configurations; Device Configuration And Mapping; Figure 4-1: Basic Scsi Connection To System - ADIC Scalar 100 User Manual
Quantum scalar 100: user guide
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Chapter 4: Understanding SAN
Configurations
One of the functions of the ADIC Gateway is to connect hosts with one kind of
interface, either as Fibre Channel or SCSl, to devices with different interfaces,
either Fibre Channel or SCSI. In a typical configuration, each ADIC Gateway
Storage Area Network interface is connected to either a single host or multiple
hosts using Fibre Channel hubs or switches.
It is important to understand how devices attached to the ADIC Gateway as
targets appear to the host systems. It is different than the way that targets attach
directly to a host system without any intervening ADIC Gateways, or bridges. See
also "Device Mapping" on page 110.
Device Configuration and Mapping
In SCSI terminology, a tape drive or a disk drive is attached to a "bus" and has a
unique address on that bus. There are three parts of the address in a conventional
parallel SCSI:
A simple case of several disk drives connected to the same bus is shown below.
Figure 4-1: Basic SCSI Connection to System
Understanding SAN Configurations
•
Bus
•
Target ID
•
LUN
53
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