Lenovo ThinkServer RD440 - Running a Consistency Check

detailedinformationaboutdiskrebuild,referto“IntroductiontoRAID”intheMegaRAIDSASSoftwareUser
GuideonthedocumentationDVDthatcomeswithyourserver.
TorebuildaphysicaldriveusingtheLSISoftwareRAIDConfigurationUtilityprogramwhenaphysicaldrive
inaRAIDarrayfails,dothefollowing:
1.StarttheLSISoftwareRAIDConfigurationUtilityprogram.See“StartingtheLSISoftwareRAID
ConfigurationUtilityprogram”onpage79
.
2.Onthemaininterfaceoftheprogram,selectRebuildandfollowtheinstructionsonthescreen.
Note:Runaconsistencycheckimmediatelyaftertherebuildcompletestoensuredataintegrityforthevirtual
drives.See“Runningaconsistencycheck”onpage83
.
Therebuildrateisthepercentageofthecomputingcyclesdedicatedtorebuildingfailingdrives.Therebuild
ratecanbeconfiguredbetween0percentand100percent.At0percent,therebuildisdoneonlyifthesystem
isnotdoinganythingelse.At100percent,therebuildhasahigherprioritythananyothersystemactivity.
ToconfiguretherebuildrateusingtheLSISoftwareRAIDConfigurationUtilityprogram,dothefollowing:
Note:Usingarebuildrateof0or100percentisnotrecommended.Thedefaultvalueis30percent.
1.StarttheLSISoftwareRAIDConfigurationUtilityprogram.See“StartingtheLSISoftwareRAID
ConfigurationUtilityprogram”onpage79
.
2.Onthemaininterfaceoftheprogram,selectObjects➙Adapter➙RebuildRate.
3.Settherebuildratebytypingadesiredvaluefromthekeyboarddirectly.
Runningaconsistencycheck
ThistopicprovidesinstructionsonhowtorunaconsistencycheckforvirtualdrivesusingtheLSISoftware
RAIDConfigurationUtilityprogram.
TheconsistencycheckoperationverifiesthatallstripesonavirtualdrivewitharedundantRAIDlevel(RAID
1,RAID5,andRAID10)areconsistentandthedateonthevirtualdriveiscorrect.Forexample,inasystem
withparity,checkingconsistencymeanscomputingthedataononedriveandcomparingtheresultsto
thecontentsoftheparitydrive.
Youshouldrunaconsistencycheckonfault-tolerantvirtualdrivesperiodically.Itisrecommendedthatyou
runaconsistencycheckatleastonceamonth.Youmustrunaconsistencycheckifyoususpectthatthe
virtualdrivedatamightbecorrupted.Ensurethatyoubackupthedatabeforerunningaconsistencycheck
ifyoususpectthatthedatamightbecorrupted.
TorunaconsistencycheckusingtheLSISoftwareRAIDConfigurationUtilityprogram,dothefollowing:
1.StarttheLSISoftwareRAIDConfigurationUtilityprogram.See“StartingtheLSISoftwareRAID
ConfigurationUtilityprogram”onpage79.
2.Onthemaininterfaceoftheprogram,selectCheckConsistencyandfollowtheinstructionsonthe
screen.
Theconsistencycheckrateistherateatwhichconsistencycheckoperationsarerunonasystem.The
consistencycheckratecanbeconfiguredbetween0percentand100percent.At0percent,theconsistency
checkisdoneonlyifthesystemisnotdoinganythingelse.At100percent,theconsistencycheckhasa
higherprioritythananyothersystemactivity.
ToconfiguretheconsistencycheckrateusingtheLSISoftwareRAIDConfigurationUtilityprogram,do
thefollowing:
Chapter5.Configuringtheserver83