Lenovo ThinkServer RD650 - Page 104

Thefollowingtableexplainsthememorymoduleinstallationorderforserversthathaveonlyone
microprocessor(CPU1)installed.
Table6.Memorymoduleinstallationorderinmirroringmodeforserverswithonemicroprocessor
CPU1DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3
Installationorder13
5
13
5
246246
Thefollowingtableexplainsthememorymoduleinstallationorderforserversthathavetwomicroprocessors
(CPU1andCPU2)installed.
Table7.Memorymoduleinstallationorderinmirroringmodeforserverswithtwomicroprocessors
CPU1DIMMCPU2DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3A1A2A3B1B2B3
C1C2C3
D1D2D3
Installationorder1
5
91
5
93
7
113
7
112610261048124812
Memorymoduleinstallationorderinsparingmode
Thesparingmodeprovidesmemoryredundancy.Inthismode,theRASfeaturesareavailable.Formore
informationabouttheRASfeatures,refertotherelatedsectionin“Features”onpage7.
Note:Allmemorymodulestobeinstalledmustbethesametypewiththesamecapacity,frequency,
voltage,andnumberofranks.
Yourserversupportsranksparingmode.Inranksparingmode,onerankofamemorymoduleworksasthe
sparerankfortheotherranksonthesamechannel.Thesparerankisnotavailableassystemmemory.To
enableranksparingmode,ensurethat:
•Atleastthreeranksareavailableinonechannel.
•Atleasttwomemorymodulesareinstalledinonechannel.
Thefollowingtableexplainsthememorymoduleinstallationorderforserversthathaveonlyone
microprocessor(CPU1)installed.
Table8.Memorymoduleinstallationorderinsparingmodeforserverswithonemicroprocessor
CPU1DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3
Installationorder11
5
22633
7
448
Thefollowingtableexplainsthememorymoduleinstallationorderforserversthathavetwomicroprocessors
(CPU1andCPU2)installed.
Table9.Memorymoduleinstallationorderinsparingmodeforserverswithtwomicroprocessors
CPU1DIMMCPU2DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3A1A2A3B1B2B3
C1C2C3
D1D2D3
Installationorder1193311
55
13
77
152210441266148816
88ThinkServerRD650UserGuideandHardwareMaintenanceManual