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Rank sparing mode

In rank sparing mode, one rank of a DIMM works as the spare rank for the other ranks on the same channel. The spare rank is not available as system memory.

Note

  • All DIMMs to be installed must be the same type with the same capacity, frequency, voltage, and ranks.

  • Single-rank RDIMMs do not support rank sparing mode.

Rank sparing mode with one processor​

Table 1. Memory population order
Total DIMMsProcessor 1Total DIMMs
87654321
131
2  6 3  2
36323
4 76 32 4
5763215
6876 3216
787643217
8876543218

Rank sparing mode with two processors​

Table 2. Memory population order
TotalProcessor 2Processor 1Total
DIMMs16151413121110987654321DIMMs
21132
3    11   6 3  3
41411634
5  14 11   6 32 5
61411106326
7  14 1110 76 32 7
81514111076328
9 1514 1110 76 3219
101514111097632110
11 1514 11109876 32111
121615141110987632112
13161514 11109876432113
141615141211109876432114
1516151412111098765432115
161615141312111098765432116