Scsi Bus Address Id Settings - Digital Equipment VAXstation 3100 Maintenance Manual

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>>>
SHOW DEVICE
ESAO SEO oa-oo-2a-02-cF-A4
DUA2 RX2 DISK
RM
RX23
DKA300 RZ3 A/3/0/00
DISK 104.2 MB FX
RZ23
MKA500 TZ5 A/5/0/00 TAPE
.........
RM
... HostID ....
A/6 INITR
DKBlOO RZ9 B/1/0/00 DISK 430.5 MB FX RZ55
DKB400 RZ12 B/4/0/00 RODI SK
xxxxxxxx RM WP
RRD40
... HostID .... B/6 IN I TR
>>>
Figure 2-9 Example of the SHOW DEVICE Command
In the previous example, ESAO is the Ethernet device and it displays the
Ethernet address of the system. DUA2 is the RX23 diskette drive on the
model 30 systems only and it displays that it is a disk (DISK) and it has
removable media (RM). The SCSI buses are listed next. Only one SCSI bus
(SCSI-A) is listed on th. e model 30 systems. DKA300 is the RZ23 at address
ID 3 on the SCSI-A bus and that contains an ST.506/SCSI MSC module. The
display shows that it is a fixed disk (FX). MKA.500 is the TZ30 at address ID
5 on the SCSI-A bus and displays that it is a tape drive which is removable
(RM).
HostID is the address ID of the SCSI-A controller (ID 6). DKB400 is
the RRD40 at address ID 4 on the SCSI-B bus and displays that it is a read-
only disk (RODISK), removable media (RM}, and is write-protected
(WP).
DKBlOO is the RZ55 expansion box at address ID l on the SCSI-B bus. And
the second HostID is the address ID of the SCSI-B controller (ID 6).
If the system does not contain a full configuration of drives internally as
previously shown, additional expansion boxes can be connected to the SCSI
port using one of the unused SCSI address ID locations. Section 2.lS.4
explains how to set the proper SCSI address ID for all devices.
2.15.4 SCSI Bus Address ID Settings
This section shows how each SCSI device's address ID is determined and set.
The jumper and switch settings shown
in
the following figures are the
recommended configurations for the drives. However, the address ID of any
drive can be changed to any one of the valid address IDs (0 to 7) as long as
there are not two devices with the same address ID on the same SCSI bus.
Remember that the SCSI/SCSI MSC module has two SCSI buses and each
bus operates independently from the other as far as address IDs are concerned.