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M2266S/H
Technical Handbook
SCSI Bus Configuration
Up to eight SCSI devices can be connected to the SCSI bus, with any
combination of the SCSI devices operating as initiators and operating as
targets.
For example, the system can be configured as a multi-host system on which
multiple host computers that operate as initiators are connected through the
SCSI bus.
Using the disconnect/reconnect function, concurrent input/output
processing is possible on multi-SCSI devices.
Peripheral Device Addressing
Each SCSI device on the bus has its own unique address (the SCSI ID
number shown in Figure 1.2). For input/output operations, a peripheral
device attached to the SCSI bus and operating as the target is addressed as the
logical unit. A unique address or logical unit number (LUN) is assigned to
each logical unit.
The initiator selects one SCSI device by specifying the SCSI ID, and then
specifies the LUN to select the peripheral device for input/output
operations.
When the IDD is constructed so that the whole volume of disk drives is a
single logical unit, the selectable SCSI ID and LUN are as follows:
• SCSI ID: Jumper selectable from 0 to 7
• LUN: 0 (fixed)
Model/Part Number Cross References
Each model has a different data format, front panel, and mounting-screw
type. Table 1.1 shows the IDD model names and part numbers. To change
the data format, reinitialize the drive on your system.
1-8
FS810125-01
...
A
Fujitsu America, Inc.
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