Solving Scsi Problems - IBM System x3950 Type 8878 Service Manual

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, Type 8878 and 8879," on page 23 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Error message
PCI Secondary Status Register Dump
Chassis#=X Slot#=Y Bus#=Z Dev.ID=0xSSSS
Vend.ID=0xTTTT Status=0xUUUU
DevFun#=0xVV
PCI Secondary Status Register Dump
Chassis#=X Slot#=Y Bus#=Z Dev.ID=0xSSSS
Vend.ID=0xTTTT Status=0xUUUU
DevFun#=0xVV
PCI to PCI Bridge Discard Timer Error
Chassis#=X Slot#=Y Bus#=Z Dev.ID=0xSSSS
Vend.ID=0xTTTT Status=0xUUUU
DevFun#=0xVV
SMI handler reporting Memory Mirroring Failover
Occurred. Running from mirrored image.
Note: This message immediately follows an
uncorrectable memory error.
SMI handler reporting Processor Event:
Unrecoverable error. Chassis Number = X.
Processor ID = Y.

Solving SCSI problems

Note: This information also applies to Serial Attached SCSI (SAS) problems.
For any SCSI error message, one or more of the following devices might be
causing the problem:
v A failing SCSI device (adapter, drive, or controller)
v An incorrect SCSI termination jumper setting
v Duplicate SCSI IDs in the same SCSI chain
v A missing or incorrectly installed SCSI terminator
v A defective SCSI terminator
v An incorrectly installed cable
v A defective cable
For any SCSI error message, follow these suggested actions in the order in which
they are listed until the problem is solved:
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IBM System x3950 Type 8878 and System x3950 E Type 8879: Problem Determination and Service Guide
Action
1. If the slot number is greater than 0, complete the following
steps:
a. Reseat the adapter.
b. Replace the adapter.
2. If the slot number is 0, replace the PCI board.
1. If the slot number is greater than 0, complete the following
steps:
a. Reseat the adapter.
b. Replace the adapter.
2. If the slot number is 0, replace the PCI board.
1. If the slot number is greater than 0, complete the following
steps:
a. Reseat the adapter.
b. Replace the adapter.
2. If the slot number is 0, replace the PCI board.
1. Reseat the DIMM or memory card.
2. If the DIMM was disabled by the user, run the
Configuration/Setup Utility program and enable the DIMM.
3. Replace the DIMM or memory card.
4. If the DIMM was disabled by the user, run the
Configuration/Setup Utility program and enable the DIMM.
(Trained service technician only) Replace the microprocessor.