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Oceniono. / 5. Na podstawie oceny klientów
•RAID5:block-levelstripingwithdistributedparity
RAID5usesdiskstripingandparitydataacrossalldrives(distributedparity)toprovidehighdata
throughput,especiallyforsmallrandomaccess.RAID5distributesparityalongwiththedataandrequires
alldrivesbutonetobepresenttooperate;drivefailurerequiresreplacement,butthearrayisnot
destroyedbyasingledrivefailure.Upondrivefailure,anysubsequentreadoperationscanbecalculated
fromthedistributedparitysothatthedrivefailureismaskedfromtheenduser.Thearraywillhavedata
lossintheeventofaseconddrivefailureandisvulnerableuntilthedatathatwasonthefailingdriveis
rebuiltontoareplacementdrive.Asingledrivefailureinthesetwillresultinreducedperformanceof
theentiresetuntilthefailingdrivehasbeenreplacedandrebuilt.
RAID5requiresaminimumnumberofthreeharddiskdrives.
•RAID6:block-levelstripingwithdistributedparity
RAID6usesdistributedparity,withtwoindependentparityblocksperstripe,anddiskstriping.ARAID6
virtualdrivecansurvivethelossofanytwodriveswithoutlosingdata.ARAID6drivegroupissimilar
toaRAID5drivegroup.Blocksofdataandparityinformationarewrittenacrossalldrives.Theparity
informationisusedtorecoverthedataifoneortwodrivesfailinthedrivegroup.
RAID6requiresaminimumnumberoffourharddiskdrives.
•RAID10:acombinationofRAID0andRAID1
RAID10consistsofstripeddataacrossmirroredspans.ARAID10drivegroupisaspanneddrive
groupthatcreatesastripedsetfromaseriesofmirroreddrives.RAID10allowsamaximumofeight
spans.YoumustuseanevennumberofdrivesineachRAIDvirtualdriveinthespan.TheRAID1
virtualdrivesmusthavethesamestripesize.RAID10provideshighdatathroughputandcompletedata
redundancybutusesalargernumberofspans.
RAID10requiresaminimumnumberoffourharddiskdrivesandalsorequiresanevennumberofdrives,
forexample,sixharddiskdrivesoreightharddiskdrives.
•RAID50:acombinationofRAID0andRAID5
RAID50usesdistributedparityanddiskstriping.ARAID50drivegroupisaspanneddrivegroupin
whichdataisstripedacrossmultipleRAID5drivegroups.RAID50worksbestwithdatathatrequires
highreliability,highrequestrates,highdatatransfers,andmedium-to-largecapacity.
Note:HavingvirtualdrivesofdifferentRAIDlevels,suchasRAID0andRAID5,inthesamedrivegroupis
notallowed.Forexample,ifanexistingRAID5virtualdriveiscreatedoutofpartialspaceinanarray,the
nextvirtualdriveinthearrayhastobeRAID5only.
RAID50requiresaminimumnumberofsixharddiskdrives.
•RAID60:acombinationofRAID0andRAID6
RAID60usesdistributedparity,withtwoindependentparityblocksperstripeineachRAIDset,anddisk
striping.ARAID60virtualdrivecansurvivethelossoftwodrivesineachoftheRAID6setswithout
losingdata.RAID60worksbestwithdatathatrequireshighreliability,highrequestrates,highdata
transfers,andmedium-to-largecapacity.
RAID60requiresaminimumnumberofeightharddiskdrives.
FordetailedinformationaboutRAID,referto“IntroductiontoRAID”intheMegaRAIDSASSoftwareUser
GuideonthedocumentationDVDthatcomeswithyourstoragearray.
ConfiguringtheadvancedSATA/SAShardwareRAID
TheMegaRAIDStorageManagerprogramhelpsyoumanagetheRAIDarrayandRAIDcontrollerinan
operatingsystemenvironment.ForinstructionsonhowtoconfigureandmanagetheadvancedSATA/SAS
hardwareRAID,refertotheMegaRAIDSASSoftwareUserGuideonthedocumentationDVDthatcomes
withyourstoragearray.ThisdocumentalsoisavailableontheLenovoWebsiteat:
http://www.lenovo.com/UserManuals
28ThinkServerStorageSA120UserGuideandHardwareMaintenanceManual
- ThinkServerStorageSA120 1
- •“Safetyinformation”onpageiii 2
- •AppendixA“Notices”onpage75 2
- Contents 3
- Index..................81 4
- Safetyinformation 5
- ©CopyrightLenovo2014 11
- Productsthatarenotassessed 12
- Chapter1.Generalinformation 13
- Documentation 14
- Chapter1.Generalinformation3 15
- Chapter2.Productoverview 17
- Productpackage 18
- Features 18
- Chapter2.Productoverview7 19
- Specifications 20
- Locations 20
- .Productoverview9 21
- Frontviewofthestoragearray 22
- Rearviewofthestoragearray 22
- Storagearraycomponents 24
- .Productoverview13 25
- CRUidentification 26
- LEDsonthefrontpanel 27
- Drive-statusLEDs 29
- Backplane 30
- Connectingthestoragearrays 31
- .Productoverview21 33
- .Productoverview23 35
- Turningonthestoragearray 37
- Turningoffthestoragearray 37
- Chapter4.ConfiguringRAID 39
- Chapter5.Updatingthefirmware 41
- Guidelines 43
- Precautions 43
- Systemreliabilityguidelines 44
- 8.Dooneofthefollowing: 50
- Figure27.Removingapowersupply 53
- Replacingthefanassembly 54
- Figure29.Removingafanassembly 55
- Figure31.RemovinganI/Omodule 56
- Figure33.Removingthescrew 58
- Figure35.Removingthedrivecage 59
- Figure36.Installingadrivecage 59
- Replacingthebackplane 60
- Figure37.Removingthecover 61
- Figure38.Removingthebackplane 62
- 1tothebottomofthechassis 63
- Figure40.Reinstallingthecover 64
- Troubleshootingprocedure 71
- Usingadiagnosticprogram 71
- Usingthecommandlineinterface 71
- Basictroubleshooting 72
- Informationresources 75
- Usingthedocumentation 75
- ThinkServerWebsite 75
- LenovoSupportWebsite 75
- Helpandservice 76
- Beforeyoucall 76
- Callingforservice 76
- Usingotherservices 77
- Purchasingadditionalservices 77
- Part1-GeneralTerms 79
- Part2-Country-specificTerms 81
- AppendixA.Notices 87
- Trademarks 88
- Importantnotes 88
- Particulatecontamination 88
- ImportantWEEEinformation 89
- AppendixA.Notices79 91
- Eurasiancompliancemark 92
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