2 bool "Reliability, Availability and Serviceability (RAS) features"
4 Reliability, availability and serviceability (RAS) is a computer
5 hardware engineering term. Computers designed with higher levels
6 of RAS have a multitude of features that protect data integrity
7 and help them stay available for long periods of time without
10 Reliability can be defined as the probability that the system will
11 produce correct outputs up to some given time. Reliability is
12 enhanced by features that help to avoid, detect and repair hardware
15 Availability is the probability a system is operational at a given
16 time, i.e. the amount of time a device is actually operating as the
17 percentage of total time it should be operating.
19 Serviceability or maintainability is the simplicity and speed with
20 which a system can be repaired or maintained; if the time to repair
21 a failed system increases, then availability will decrease.
23 Note that Reliability and Availability are distinct concepts:
24 Reliability is a measure of the ability of a system to function
25 correctly, including avoiding data corruption, whereas Availability
26 measures how often it is available for use, even though it may not
27 be functioning correctly. For example, a server may run forever and
28 so have ideal availability, but may be unreliable, with frequent
33 source "arch/x86/ras/Kconfig"