IBM 7979B1U User Manual page 87

In the configuration that you use, install the largest DIMMs first.
Table 6. Online-spare DIMM configurations, basic scheme
Number of
DIMMs DIMM connectors
4 1 and 4 (largest DIMMs)
2 and 5
6 1 and 4 (largest DIMMs)
2 and 5
3 and 6
8 1 and 4 (largest DIMMs)
2 and 5
3 and 6
7 and 10 (dual-rank DIMMs only)
10 1 and 4 (largest DIMMs)
2 and 5
3 and 6
7 and 10
8 and 11
12 1 and 4 (largest DIMMs)
2 and 5
3 and 6
7 and 10
8 and 11
9 and 12
Table 7. Online-spare DIMM configurations, alternative scheme (requires BIOS code version
1.04 or later)
Number
of DIMMs DIMM connectors
4 7 and 10 (largest DIMMs)
8 and 11
6 7 and 10 (largest DIMMs)
8 and 11
9 and 12
8 7 and 10 (largest DIMMs)
8 and 11
9 and 12
1 and 4 (dual-rank DIMMs only)
10 1 and 4 (largest DIMMs)
2 and 5
7 and 10
8 and 11
9 and 12
12 N/A
Results
Online-sparing on branch 0
Online-sparing on branch 0
Online-sparing on branch 0
Online-sparing on dual-rank DIMMs on
branch 1
Online-sparing on branch 0
Online-sparing on branch 1
Online-sparing on branch 0
Online-sparing on branch 1
Results
Online-sparing on branch 1
Online-sparing on branch 1
Online-sparing on branch 1
Online-sparing on dual-rank DIMMs on
branch 0
Online-sparing on branch 0
Online-sparing on branch 1
N/A
Chapter 2. Installing optional devices
71