Lenovo ThinkServer RD650 - Configuring Raid; About Raid

To Next Page

To Previous Page

2.AfterthesystemhealthLEDturnsoff,pressthepowerbuttontoturnontheserver.Theserveris

turnedonandthenturnedoffautomatically.Then,therecoveryprocessstarts.Waitforabout20

minutesfortheTSMtorecovertheBIOS.Topreventpermanentdamage,DONOTTURNOFFTHE

SERVERduringtherecoveryprocess.Whentherecoveryprocessiscompleted,theserverturns

onautomatically.

3.CheckandconﬁguretheBIOSsettingsforyourspeciﬁcneeds.See“UsingtheSetupUtility

program”onpage61

•UsingtheBIOSrecoveryjumper

TorecoverytheBIOSsettingsusingtheBIOSrecoverswitch,refertoSystemboardjumpersandswitches.

Note:IfyoucannotrecovertheBIOSafterusingtheinstructionsinthistopic,theBIOSread-onlymemory

(ROM)mightbedamaged.Youmustreplacethesystemboard.ContacttheLenovoCustomerSupport

Center.

ConﬁguringRAID

ThistopicprovidesinformationaboutRAIDandtheutilityprogramsthatareavailableforyoutoconﬁgure

RAID.

Thistopiccontainsthefollowinginformation:

•“AboutRAID”onpage68

•“ConﬁguringRAIDusingtheLenovoThinkServerDeploymentManagerprogram”onpage70

•“ConﬁguringtheadvancedSATAorSAShardwareRAID”onpage70

AboutRAID

RAID,anacronymforRedundantArrayofIndependentDisks,isatechnologythatprovidesincreased

storagefunctionsandreliabilitythroughredundancy.Thisisachievedbycombiningmultipleharddiskdrives

intoalogicalunit,wheredataisdistributedacrossthedrivesinoneofseveralwayscalledRAIDlevels.

WhenagroupofindependentphysicalharddiskdrivesaresetuptouseRAIDtechnology,theyareina

RAIDarray.Thisarraydistributesdataacrossmultipleharddiskdrives,butthearrayappearstothehost

serverasonesinglestorageunit.CreatingandusingRAIDarraysprovideshighperformance,suchasthe

expeditedI/Operformance,becauseseveraldrivescanbeaccessedsimultaneously.

RAIDdrivegroupsalsoimprovedatastoragereliabilityandfaulttolerancecomparedwithsingle-drive

storagesystems.Datalossresultingfromadrivefailurecanbepreventedbyreconstructingmissingdata

fromtheremainingdrives.

ThefollowinglistdescribessomeofthemostcommonlyusedRAIDlevels:

•RAID0:block-levelstripingwithoutparityormirroring

SimplestripesetsarenormallyreferredtoasRAID0.RAID0usesstripingtoprovidehighdata

throughput,especiallyforlargeﬁlesinanenvironmentthatdoesnotrequirefaulttolerance.RAID0hasno

redundancyanditprovidesimprovedperformanceandadditionalstoragewithoutfaulttolerance.Any

drivefailuredestroysthearrayandthelikelihoodoffailureincreaseswithmoredrivesinthearray.RAID

0doesnotimplementerrorchecking,soanyerrorisuncorrectable.Moredrivesinthearraymeans

higherbandwidth,butgreaterriskofdataloss.

RAID0requiresaminimumnumberofoneharddiskdrive.

68ThinkServerRD650UserGuideandHardwareMaintenanceManual

Other manuals for Lenovo ThinkServer RD650