DS8000 Service Documentation Version 7.5

MAP20F5 Expansion rack PPS to rack 1 RPC communication problem detected

A PPS to RPC card communication problem was detected. The problem normally will be mis-plugged PPS or RPC card cables detected during an install or repair action.

About this task

MAP20F5 Section-1

Procedure

The RPC to PPS communication cable is a "Y" cable that connects one RPC card to the sequencer module in each PPS in a rack. Each rack in the storage facility has two "Y" cables, one going to each RPC card.
One or more PPS to RPC card cables have been detected as mis-plugged at PPS-1, PPS-2, or the RPC card. This should only occur during an install or repair action that caused you to connect or reconnect the cables.
Note: If this occurred during an install, it is possible that a cable was mislabeled. If a labeling error is found, mark the label so it will not cause future problems.

Use the tables below to physically trace each cable and ensure all three ends are correctly plugged. If a problem is found, you must not hot plug the cables to correct the problem. Instead, return and repeat the procedure during which the cables were connected. If this is not possible, contact your next level of support.

Table 1. RPC-1 card to PPS-1 and PPS-2
RPC-1 card connector (see Figure 1)	Rack number	PPS-1 (upper) sequencer module connector (see Figure 2)	PPS-2 (lower) sequencer module connector (see Figure 2)
C1-T201	1	J1	J1
C1-T203	2	J1	J1
C1-T205	3	J1	J1
C1-T207	4	J1	J1
C1-T209	5	J1	J1

Table 2. RPC-2 card to PPS-1 and PPS-2
RPC-2 card connector (see Figure 1)	Rack number	PPS-1 (upper) sequencer module connector (see Figure 2)	PPS-2 (lower) sequencer module connector (see Figure 2)
C2-T201	1	J2	J2
C2-T203	2	J2	J2
C2-T205	3	J2	J2
C2-T207	4	J2	J2
C2-T209	5	J2	J2

Figure 1. Location codes for the RPC cards (Models 941, 951)

Figure 2. PPS sequencer module RPC connectors