Specifications
Table Of Contents
- Safety information
- Chapter 1. General information
- Chapter 2. Server setup road map
- Chapter 3. Product overview
- Chapter 4. Turning on and turning off the server
- Chapter 5. Configuring the server
- Chapter 6. Installing, removing, or replacing hardware
- Guidelines
- Removing the server cover
- Removing and reinstalling the front bezel
- Removing and reinstalling the PCI card bracket assembly
- Installing, removing, or replacing hardware
- Installing or removing a memory module
- Installing or removing the Ethernet card
- Installing or removing the RAID card
- Installing or removing the ThinkServer RAID 500 Upgrade Key for Advanced RAID
- Installing or removing the ThinkServer RAID 700 Battery
- Installing or replacing an optical drive
- Installing or removing a non-hot-swap hard disk drive
- Installing or replacing an internal RDX drive
- Installing or replacing a 2.5-inch solid-state drive
- Installing or replacing a hot-swap hard disk drive
- Installing or replacing a hot-swap redundant power supply
- Replacing the power distribution board and cage assembly
- Replacing the power conversion board
- Replacing the hot-swap hard-disk-drive backplane
- Replacing the non-hot-swap power supply assembly
- Replacing the cover presence switch
- Replacing the front panel board assembly
- Replacing the front system fan 1
- Replacing the rear system fan
- Replacing the heat sink and fan assembly
- Replacing the microprocessor
- Replacing the system board battery
- Replacing the system board
- Completing the parts replacement
- Chapter 7. Troubleshooting and diagnostics
- Chapter 8. Getting information, help, and service
- Appendix A. Notices
- Trademarks
- Important notes
- Polyvinyl Chloride (PVC) cable and cord notice
- Recycling information
- Particulate contamination
- Important WEEE information
- Restriction of Hazardous Substances Directive (RoHS)
- German Ordinance for Work gloss statement
- Export classification notice
- Electronic emission notices
- Eurasian compliance mark
- Index
•RAID0:block-levelstripingwithoutparityormirroring
SimplestripesetsarenormallyreferredtoasRAID0.RAID0usesstripingtoprovidehighdata
throughput,especiallyforlargefilesinanenvironmentthatdoesnotrequirefaulttolerance.RAID0hasno
redundancyanditprovidesimprovedperformanceandadditionalstoragewithoutfaulttolerance.Any
drivefailuredestroysthearrayandthelikelihoodoffailureincreaseswithmoredrivesinthearray.RAID
0doesnotimplementerrorchecking,soanyerrorisuncorrectable.Moredrivesinthearraymeans
higherbandwidth,butgreaterriskofdataloss.
RAID0requiresaminimumnumberoftwoharddiskdrives.
•RAID1:mirroringwithoutparityorstriping
RAID1usesmirroringsothatdatawrittentoonedriveissimultaneouslywrittentoanotherdrive.Thisis
goodforsmalldatabasesorotherapplicationsthatrequiresmallcapacitybutcompletedataredundancy.
RAID1providesfaulttolerancefromdiskerrorsorfailuresandcontinuestooperateaslongasatleast
onedriveinthemirroredsetisfunctioning.Withappropriateoperatingsystemsupport,therecanbe
increasedreadperformanceandonlyaminimalwriteperformancereduction.
RAID1requiresaminimumnumberoftwoharddiskdrives.
•RAID5:block-levelstripingwithdistributedparity
RAID5usesdiskstripingandparitydataacrossalldrives(distributedparity)toprovidehighdata
throughput,especiallyforsmallrandomaccess.RAID5distributesparityalongwiththedataandrequires
alldrivesbutonetobepresenttooperate;drivefailurerequiresreplacement,butthearrayisnot
destroyedbyasingledrivefailure.Upondrivefailure,anysubsequentreadoperationscanbecalculated
fromthedistributedparitysothatthedrivefailureismaskedfromtheenduser.Thearraywillhavedata
lossintheeventofaseconddrivefailureandisvulnerableuntilthedatathatwasonthefailingdriveis
rebuiltontoareplacementdrive.Asingledrivefailureinthesetwillresultinreducedperformanceof
theentiresetuntilthefailingdrivehasbeenreplacedandrebuilt.
RAID5requiresaminimumnumberofthreeharddiskdrives.
•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.
FordetailedinformationaboutRAID,referto“IntroductiontoRAID”intheMegaRAIDSASSoftwareUser
GuideonthedocumentationDVDthatcomeswithyourserver.
RAIDforyourserver
ThistopicprovidesinformationabouttheRAIDsupportedbyyourserver.
58ThinkServerTS440HardwareMaintenanceManual