IBM Power Systems S822LC Technical Overview And Introduction page 51

Table 2-2 Major component repair matrix
Element
SATA HDD
SATA SSD
Power supply
Cooling fans
DIMM riser
DIMM
Processor
PCIe adapter
Storage adapter
GPU
Planer
HDD/Fan card
Fan power cable
DASD signal cable
Front USB Cable
Detection introduction
The first and most crucial component of a solid serviceability strategy is the ability to detect
accurately and effectively errors when they occur.
Although not all errors are a guaranteed threat to system availability, those errors that go
undetected can cause problems because the system has no opportunity to evaluate and act if
necessary. POWER processor-based systems employ IBM z™ Systems server-inspired error
detection mechanisms, extending from processor cores and memory to power supplies and
hard disk drives (HDDs).
Error checkers and fault isolation registers
POWER processor-based systems contain specialized hardware detection circuitry that is
used to detect erroneous hardware operations. Error-checking hardware ranges from parity
error detection that is coupled with Processor Instruction Retry and bus try again, to ECC
correction on caches and system buses.
Within the processor/memory subsystem error checker, error-checker signals are captured
and stored in hardware FIRs. The associated logic circuitry is used to limit the domain of an
error to the first checker that encounters the error. In this way, runtime error diagnostic tests
can be deterministic so that for every check station, the unique error domain for that checker
is defined and mapped to CRUs that can be repaired when necessary.
Concurrent Repair Customer Repair
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes
Yes
Yes
Yes
Yes
Yes
Chapter 2. Management, Reliability, Availability, and Serviceability
SSR Replace
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
37