EXTSCSI

The external signal cable may be failing.

Perform the following:
  1. Is more than one device attached?
    • No: Continue with the next step.
    • Yes: See the device documentation for information about setting the device address. This ends the procedure.
  2. Is the attached device in the system unit?
    • No: Continue with the next step.
    • Yes: Use symbolic FRU BACKPLN to determine which signal cables to replace. This ends the procedure.
  3. Find the IOA type:
    1. Find the IOA location.
    2. Use the location information of the IOA in the Service Action Log if it is available. If the location is not available, find the address. See System reference code (SRC) address formats, or see "System reference code (SRC) address formats" in the service guide for the system unit. Use the address to find the location. See Locating FRUs, or see "Locating FRUs" in the service guide for the system unit.
    3. Find the IOA card in the system and read the type number of the card at that location.
  4. Find the IOA type, the attached device, the cable length, and the cable part number in the following list.
  5. Verify that the part number in the list is the same as the part number on the cable.
  6. For external devices that are not found in the following list, use the device type and refer to the appropriate service documentation for that device. The service documentation for that device will help you determine the FRU part numbers and replacement procedures you are to use during this repair action. If you are unable to locate the documentation for your specific device, then contact your next level of support for assistance.
    Table 1. External device and part numbers
    IOP or IOA Type Device Lengths Part Number
    2749 3490, 3490/Exx, 3590 2.8 meters 05H4647
    2749 3490, 3490/Exx, 3590 4.5 meters 05H4648
    2749 3490, 3490/Exx, 3590 12.0 meters 05H4649
    2749 3490, 3490/Exx, 3590 18.0 meters 05H4650
    2749 3490, 3490/Exx, 3590 25.0 meters 05H4651
    2749 3490/Fxx, 3570, 358x, 9427, 7208/342 0.5 meters 49G6456
    Note: For 9427 see the note following this table.
    2749 3490/Fxx, 3570, 358x, 9427, 7208/342 4.5 meters 49G6457
    Note: For 9427 see the note below this table.
    2749 3490/Fxx, 3570, 358x, 9427, 7208/342 12.0 meters 49G6458
    Note: For 9427 see the note below this table.
    2749 3490/Fxx, 3570, 358x, 9427, 7208/342 18.0 meters 49G6459
    Note: For 9427 see the note below this table.
    2749 63A0   See device documentation to determine cable part numbers
    2749 7208/012, 7208/222 1.5 meters 52G0174
    2749 7208/012, 7208/222 4.0 meters 59H3462
    2749 7208/012, 7208/222 12.0 meters 59H3463
    2749 7208/232, 7208/234, 9348 0.5 meters 06H6037
    2749 7208/232, 7208/234, 9348 4.0 meters 59H3460
    2749 7208/232, 7208/234, 9348 12.0 meters 05H5543
    2749 3995 12.0 meters 05H5543
    2782, 5702, 5703, 571A 358x, 7206/VX2, 7207/122, 7208/345, 7210/020, 7210/025 1.5 meters 19P4508, or 19P4506 with 19P0482 interposer cable
    2782, 5702, 5703, 571A 358x, 7206/VX2, 7207/122, 7208/345, 7210/020, 7210/025 2.5 meters 19P0279, or 35L1307 with 19P0482 interposer cable
    2782, 5702, 5703, 571A 358x, 7206/VX2, 7208/345 4.5 meters 19P0050
    2782, 5702, 5703, 571A 358x, 7206/VX2, 7208/345 10 meters 19P0048
    571B, 571F 5786 or 5787 expansion unit 1 meter 36R2585
    571B, 571F 5786 or 5787 expansion unit 3 meters 36R2576
    571B, 571F 5786 or 5787 expansion unit 5 meters 36R2577
    571B, 571F 5786 or 5787 expansion unit 10 meters 36R2578
    571B, 571F 5786 or 5787 expansion unit 20 meters 36R2579
    Notes:
    • All cables for the 9427 tape library must include an interposer (part 05H3834) on the device end of the cable.
    • All cables for the 3996 and 399F attachment are the responsibility of the external device service.
    • For specific 358X attachment cable information, refer to the specific device and model service documentation, or contact your next level of support.

This ends the procedure.