Which of the following RAS features is always enabled and functional on an E870 / E880, regardless of
configuration?

A.
System auto-restart

B.
Dynamic Processor Sparing

C.
Dynamic Memory Sparing

D.
Processor Instruction Retry

Explanation:
Processor Instruction Retry allows the system to recover from soft faults that otherwise result in outages of
applications or the entire server.
Note: Within the processor core, soft error events might occur that interfere with the various computation units.
When such an event can be detected before a failing instruction is completed, the processor hardware might be
able to try the operation again by using the advanced RAS feature that is known as Processor Instruction Retry.
IBM Power Systems E870 and E880 Technical Overview and Introduction (October 2014), page
150
https://mrt.presalesadvisor.com/PowerStoragePDF/687.pdf