Lenovo System x3500 M5 Type 5464 - Memory Rank Sparing

Table8.MemorymirroredchannelmodeDIMMpopulationsequence(continued)
NumberofDIMMs
Numberofinstalled
microprocessor
DIMMconnector
NinthpairofDIMMs
219,22
TenthpairofDIMMs
27,10
EleventhpairofDIMMs
215,18
TwelfthpairofDIMMs
23,6
WhenyouinstallorremoveDIMMs,theserverconfigurationinformationchanges.Whenyourestartthe
server,thesystemdisplaysamessagethatindicatesthatthememoryconfigurationhaschanged.
Memoryranksparing
Sparingenablesafailingranktobereplacedbyranksinstalledinanunoccupiedspace.Anunusedspare
rankonthechannelcanbeusedtocopythecontentsofafailingrankonthatchannel.
YoucanenableranksparingmemoryintheSetuputility(see“StartingtheSetuputility”onpage107).
ThememoryranksparingmoderequiresanevennumberofDIMMs.Ifyourserverhasanoddnumberof
DIMMsinstalled,ensurethatyoudisablethememoryranksparingmodefromtheMemorymenuinSetup
Utility.See“UsingtheSetuputility”onpage107
.
Note:Afterdisablingthememoryranksparingmode,ifamessagepromptsthatthememoryconfigurationis
notvalid,restarttheIMM2.1.Alternatively,youcanturnofftheserver,disconnectitfromandthenreconnect
ittoacpower,andthenturnontheserveragain.
ThefollowingdiagramliststheDIMMconnectorsoneachmemorychannel.
Microprocessor 1
Microprocessor 2
DIMM 1
DIMM 2
DIMM 3
DIMM 4
DIMM 5
DIMM 6
DIMM 7
DIMM 8
DIMM 9
DIMM 10
DIMM 11
DIMM 12
DIMM 13
DIMM 14
DIMM 15
DIMM 16
DIMM 17
DIMM 18
DIMM 19
DIMM 20
DIMM 21
DIMM 22
DIMM 23
DIMM 24
Channel
CPU2
CPU1
Figure64.Connectorsoneachmemorychannel
78Systemx3500M5InstallationandServiceGuide