IBM S822LC, Технический обзор и введение

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Chapter 2. Management, Reliability, Availability, and Serviceability
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Table 2-2 Major component repair matrix
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.
Element Concurrent Repair Customer Repair SSR Replace
SATA HDD Yes Yes Yes
SATA SSD Yes Yes Yes
Power supply Yes Yes Yes
Cooling fans Yes Yes Yes
DIMM riser Yes
DIMM Yes
Processor Yes
PCIe adapter Yes Yes
Storage adapter Yes Yes
GPU Yes Yes
Planer Yes
HDD/Fan card Yes
Fan power cable Yes Yes
DASD signal cable Yes Yes
Front USB Cable Yes Yes