DS8000 Service Documentation Version 7.5

MAP2030 Check / Reorder Cable FRU

A cable can cause a failure if it is unplugged, incorrectly plugged, or otherwise damaged. MAP2030 guides you through visually inspecting the cable before you replace any FRUs. If an obvious cable problem is found, this MAP guides you to bypass replacing active FRUs and replacing only the cable.

Before you begin

Do not attempt to correct any cable defect until you are directed to repair the cable.

About this task

An unplugged, incorrectly plugged, or otherwise damaged cable can cause a failure. Some cable failures can be found by visual inspection. If a cable is in the FRU list, it usually means the problem was detected in the interface or through a connection between two or three active FRUs. There are two types of interface failures:
  • All signals in the cable fail. This normally is an unplugged cable. There is a greater chance of finding cable failure by visual inspection.
  • Some signals in the cable work correctly. This normally is internal or connector damage. There is less chance of finding cable failure by visual inspection.

MAP2030 is normally only included at the top of the FRU list if the failure is for all signals in the cable. In general, the active logic or power FRUs at each end of the cable have a much higher probability of failure than a passive interconnect cable FRU. Therefore, the passive cable is normally listed last in the FRU list.

Repairs occur by replacing the highest to lowest probability FRUs, one at a time. The only exception is where a visual inspection of the cable reveals it is unplugged, incorrectly plugged, or severely damaged. In this case, there is no reason to replace active FRUs. Instead the first FRU to be replaced should be the cable.

Table 1 includes a sample FRU list.
Table 1. Sample FRU list for MAP2030 (Model 94x/95x FRUs shown, Model 96x similar)
Part number Class FRU description Location code
MAP2030 Isolate procedure N/A N/A
PSPRPWR FRU Primary power supply U2421.A01.75DK360-E1
RPCCARD N/A RPC card U2421.A01.75DK360-C1
PSCBL0E Symbolic procedure RPC/PPS interface power cable U2421.A01.75DK360-C1-T201
CBLCONT Symbolic procedure Other end of RPC/PPS interface power cable U2421.A01.75DK360-E1-T1
CBLCONT Symbolic procedure Other end of RPC/PPS interface power cable U2421.A01.75DK360-E2-T1
Notes:
  • The interconnect cable is a Y cable; it connects the RPC card to both primary power supplies.
  • In the part number column, PSCBL0E is the FRU to select to begin the parts exchange process for this cable. That process puts the proper resource, in this case, the RPC card, the cable attaches to, in the proper state to allow the cable to be replaced and properly verified.
  • In the part number column, both CBLCONTs are listed for informational purposes only. The location codes provided are used to visually inspect the remaining ends of the cable. The service boundary associated with each CBLCONT will not allow a proper repair of the cable and, therefore, cannot be selected to be repaired.
Related tasks:
How to start the service information center

MAP2030 Section-1

Procedure

  1. The serviceable event FRU list that sent you here contains one or more cables in addition to other FRUs.
    • Cables are listed last in the FRU list as they are least likely to fail.
    • Each end of the same cable will appear separately in the FRU list. Each end of the cable will use the location code of the FRU connector that it plugs to.
    Important: Although all ends of each cable will appear in the FRU list, they collectively represent one cable. Therefore, only the first cable location code is available to select for repair or replace for each cable in the FRU list. The subsequent CBLCONT location code shows where a cable continues to connect to, but is not available to select for repair or replace.
  2. Inspect both ends of each cable listed in the FRU list.
    1. Do not plug or unplug the cable.
    2. Visually check each end of the cable listed on the screen that sent you here to ensure it is properly plugged into the correct connector.
    3. Observe the body of the cable to ensure it is not damaged.
    Is the cable properly plugged and not damaged visually?
    • Yes, go to the next step.
    • No, go to step 4.
  3. The cable is properly plugged and is not damaged.
    1. Return to the screen that sent you here.
    2. To the question What was the result of using the service procedure from Infocenter?, click Problem not fixed and then click Next.
    3. To the question Did you exchange any parts?, click No and then click Next.
    4. To the question Did you isolate the problem?, click No and then click Next.
    5. The next FRU in the list is displayed. Continue the repair by replacing the remaining FRUs until the problem is fixed.
    6. Check for any fenced or quiesced power FRUs in the FRU list. Refer to MAP1100 View storage facility state (end of call).
      Were any rack power resources found fenced or quiesced?
      • Yes. If there are open related serviceable events, repair them now. If there are no open related serviceable events, do a pseudo repair of the FRU that is fenced or quiesced. Refer to MAP2600 Pseudo FRU exchange needed to reset existing FRU.
      • No, this procedure is complete. Exit this MAP.
  4. The cable is incorrectly plugged or damaged.
    1. Return to the screen that sent you here.
    2. To the question What was the result of using the service procedure from Infocenter?, click Problem not fixed and then click Next.
    3. To the question Did you exchange any parts?, click No and then click Next.
    4. To the question Did you isolate the problem?, click No and then click Next.
    5. The next FRU in the list is displayed. You are going to pretend that the other FRUs in the prior FRU list are not available onsite to be replaced.
      When asked if the FRU is available to be replaced, answer No. This will cause each FRU in the list to be displayed until the incorrectly plugged cable or the damaged cable is displayed. When the incorrectly plugged cable or the damaged cable is displayed, do a normal FRU replace. Each cable will have more than one entry in the FRU list, but you only select the first cable location code, and never a CBLCONT location code.

    6. Check for any quiesced or fenced power FRUs related to this serviceable event. Refer to MAP1100 View storage facility state (end of call), sections 36 and 37.
    7. Were any related rack power resources (FRUs) found quiesced or fenced?
      • No, the repair is complete, exit this MAP.
      • Yes. That FRU needs a pseudo repair to reset the condition. A pseudo repair for this step means you use a normal FRU replace procedure but do not replace the FRU or disconnect cables when directed. The code will reset the condition. If the FRU is listed in an open serviceable event, use that to do the pseudo repair. If the FRU is not listed in an open serviceable event, refer to MAP2600 Pseudo FRU exchange needed to reset existing FRU. When the pseudo repair is complete, exit this MAP.