
D.2 DSSI VAXcluster Installation of an DECarray
Note
A DSSI VAXcluster bus can only be connected from a VAX 4000 to a
single DECarray and then to another VAX 4000.
For a VAX 4000 Model 200, DSSI bus 0 connect to ports 1 and 9 on the
DECarray. The first KFQSA adapter connects to port 2 and 10. The second
KFQSA adapter connects to port 3 and 11.
For a VAX 4000 Model 300, DSSI bus 0 and 1 connect to ports 1, 2 and 9, 10 on
the DECarray. The first KFQSA adapter connects to port 3 and 11. The second
KFQSA adapter connects to port 4 and 12.
This section provides the procedures for installing the DECarray in a DSSI
VAXcluster configuration correctly and safely. Digital Multivendor Customer
Services or trained installing personnel must perform the procedures.
Make sure that all precautions for site preparation have been completed. Refer
to DECarray installation guide.
The following procedures provide the steps to:
• Inspecting the array for proper configuration (Section D.2.1)
• Cable the DECarray with an existing VAX 4000 Model 300 system in the
DSSI VAXcluster configuration (Section D.2.2)
• Verify the DECarray for correct operation (Section D.2.3)
D.2.1 Inspecting the Storage Array (DSSI VAXcluster)
This procedure describes the steps to inspect the DECarray for correct
configuration.
Inspection the DECarray from the front, then from the rear.
At the front of the DECarray:
a. The DSSI ID switches behind the door of the OCP of every SF7x enclosure
installed are set according to Table D–3 and Figure D–7.
b. The MSCP switch (right-most switch of each switch pack) should be in the
down or enabled position at all times unless you are instructed to change it
to the up or disabled position.
D–14 Installing a DECarray with VAX 4000 Systems
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