Memory rank sparing
The memory rank sparing feature disables the failed memory from the system configuration and activates a
rank sparing DIMM to replace the failed active DIMM.
You can enable rank sparing memory in the Setup Utility, select
System Settings
➙
Memory
. For more
information, see “Using the Setup Utility” on page 36.
The maximum available memory is reduced when memory rank sparing mode is enabled.
The memory rank sparing mode requires an even number of DIMMs. If your server has an odd number of
DIMMs installed, ensure that you disable the memory rank sparing mode from the
Memory
menu in Setup
Utility. See “Using the Setup Utility” on page 36.
Note:
After disabling the memory rank sparing mode, if a message prompts that the memory configuration is
not valid, restart the IMM2. Alternatively, you can turn off the server, disconnect it from and then reconnect
it to ac power, and then turn on the server again.
The following diagram lists the DIMM connectors on each memory channel.
Figure 88. Connectors on each memory channel
Follow the installation sequence for rank sparing mode:
• Install at least one quad-rank DIMM in a channel.
• Install at least two single-rank or dual-rank DIMMs in a channel.
Table 29. Memory rank sparing mode DIMM population sequence when only quad-rank RDIMMs are installed
Number of installed
microprocessors
DIMM connector population sequence on the system board
One
1, 4, 9, 12, 2, 5, 8, 11
Two
1, 13, 4, 16, 9, 21, 12, 24, 2, 14, 5, 17, 8, 20, 11, 23
Table 30. Memory rank sparing mode DIMM population sequence when single/dual/quad rank DIMMs are installed and
the total number of DIMMs is even
DIMMs
Number of installed
microprocessors
DIMM connector population
sequence on the system board
One Microprocessor
1st set
1
1, 2
2nd set
1
4, 5
3rd set
1
8, 9
4th set
1
11, 12
Removing and replacing components
165
Содержание System x3550 M5
Страница 1: ...Lenovo System x3550 M5 Installation and Service Guide Machine Type 8869 ...
Страница 6: ...iv Lenovo System x3550 M5 Installation and Service Guide ...
Страница 66: ...52 Lenovo System x3550 M5 Installation and Service Guide ...
Страница 298: ...284 Lenovo System x3550 M5 Installation and Service Guide ...
Страница 1120: ...1106 Lenovo System x3550 M5 Installation and Service Guide ...
Страница 1124: ...1110 Lenovo System x3550 M5 Installation and Service Guide ...
Страница 1132: ...Taiwan BSMI RoHS declaration 1118 Lenovo System x3550 M5 Installation and Service Guide ...
Страница 1134: ...1120 Lenovo System x3550 M5 Installation and Service Guide ...
Страница 1142: ...1128 Lenovo System x3550 M5 Installation and Service Guide ...
Страница 1143: ......
Страница 1144: ......