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
Total DIMMs | Processor 1 | Total DIMMs | |||||||
---|---|---|---|---|---|---|---|---|---|
8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | ||
1 | 3 | 1 | |||||||
2 | 6 | 3 | 2 | ||||||
3 | 6 | 3 | 2 | 3 | |||||
4 | 7 | 6 | 3 | 2 | 4 | ||||
5 | 7 | 6 | 3 | 2 | 1 | 5 | |||
6 | 8 | 7 | 6 | 3 | 2 | 1 | 6 | ||
7 | 8 | 7 | 6 | 4 | 3 | 2 | 1 | 7 | |
8 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 8 |
Rank sparing mode with two processors
Total | Processor 2 | Processor 1 | Total | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
DIMMs | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | DIMMs |
2 | 11 | 3 | 2 | ||||||||||||||
3 | 11 | 6 | 3 | 3 | |||||||||||||
4 | 14 | 11 | 6 | 3 | 4 | ||||||||||||
5 | 14 | 11 | 6 | 3 | 2 | 5 | |||||||||||
6 | 14 | 11 | 10 | 6 | 3 | 2 | 6 | ||||||||||
7 | 14 | 11 | 10 | 7 | 6 | 3 | 2 | 7 | |||||||||
8 | 15 | 14 | 11 | 10 | 7 | 6 | 3 | 2 | 8 | ||||||||
9 | 15 | 14 | 11 | 10 | 7 | 6 | 3 | 2 | 1 | 9 | |||||||
10 | 15 | 14 | 11 | 10 | 9 | 7 | 6 | 3 | 2 | 1 | 10 | ||||||
11 | 15 | 14 | 11 | 10 | 9 | 8 | 7 | 6 | 3 | 2 | 1 | 11 | |||||
12 | 16 | 15 | 14 | 11 | 10 | 9 | 8 | 7 | 6 | 3 | 2 | 1 | 12 | ||||
13 | 16 | 15 | 14 | 11 | 10 | 9 | 8 | 7 | 6 | 4 | 3 | 2 | 1 | 13 | |||
14 | 16 | 15 | 14 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 4 | 3 | 2 | 1 | 14 | ||
15 | 16 | 15 | 14 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 15 | |
16 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 16 |
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