Technical data

6. Attach the ISE front panel to the enclosure by first fitting the panel’s
lower tabs and then fitting the panel into position. Secure the panel
with its single screw (Figure 2–6C).
2.4.3.1 Inserting Bus Node ID Plugs
Spare bus node ID plugs are supplied with your expander. The DSSI plugs
for RF-series ISEs are dark gray (PN 12-28766-19). The SCSI plugs for
RZ-series ISEs are lighter gray (PN 12–28766–28).
Bus node ID plugs have prongs on the back that identify the bus node
number (and by default, the unit number) of the ISEs to the system. Bus
node ID plugs are shipped with the system and expander.
To insert a bus node ID plug, align the two center prongs with the two
center slots on the ISE front panel as shown in Figure 2–7. To remove a
bus node ID plug, grasp it firmly and pull it straight out.
Use the rules below for numbering bus node IDs for ISEs:
• For each DSSI or SCSI bus, do not duplicate bus node numbers for
storage elements. You can have only one storage element on bus 0
identified as bus node 0, one storage element as bus node 1, and so on;
you can have only one storage element on bus 1 identified as bus node
0, one storage element as bus node 1, and so on.
• By convention, the ISEs are numbered in increasing order from right
to left starting with 0, and working from upper mass storage area to
lower.
Bus nodes 0–6 are typically used for storage devices, while node 7 is
reserved for the adapter, and is the default bus node ID for the KZQSA
and KFQSA adapters.
NOTE: DSSI Bus node ID plugs are also used to supply node numbers for
the two DSSI host adapters on VAX 4000 Model 300 systems.
NOTE: If you change the bus node ID plugs while the system is operating,
you must turn off the system and then turn it back on for the new plug
positions to take effect.
Installation 2–13