DescriptionName
Whetherthe system activelysearches for, and corrects, single
bitmemory errors even in unused portions of the memory on
theserver. This can be one of the following:
•Disabled—Thesystem checks for memory ECC errors
onlywhen theCPU readsor writesa memoryaddress.
•Enabled—Thesystem periodically reads andwrites
memorysearching for ECC errors. If any errors are found,
thesystem attemptsto fix them.This optionmay correct
singlebit errors before they become multi-bit errors, but
itmay adversely affect performance when the patrol scrub
isrunning.
PatrolScrub
Whetherthe system corrects single bitmemory errors
encounteredwhen the CPUor I/O makes a demand read. This
canbe one of the following:
•Disabled—Singlebit memory errors are not corrected.
•Enabled—Singlebit memory errors arecorrected in
memoryand the corrected data is set in response to the
demandread.
DemandScrub
Theapproximate number of meters above sea level at which the
physicalserver is installed. This can be one of the following:
•Auto—TheCPU determinesthe physical elevation.
•—Theserver is approximately 300 meters above sea level.
•—Theserver is approximately 900 meters above sea level.
•—Theserver isapproximately 1500 metersabove sea
level.
•—Theserver isapproximately 3000 metersabove sea
level.
Altitude
Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
244 OL-28893-01
BIOS Parameters by Server Model
Advanced BIOS Parameters for C420 Servers