Upgrading Your Server 9-61
The online spare memory feature can be used under the following conditions:
Install memory devices to more than one group in each memory branch. The server can
operate if the memory branches may be different in the number of DIMMs. For example,
no error occurs if memory branches 0 and 1 include four DIMMs (or two groups) and six
DIMMs (or three groups), respectively.
DIMMs installed in a specific memory branch should have the same capacity. The server
can operate as long as DIMMs of the same capacity are installed in each memory branch.
(For example, the server can operate if the total capacity of memory branch 0 is different
from that of memory branch 1.)
Run SETUP (see Chapter 4), change parameters appropriately in the [Sparing] menu
selected as shown below, save the settings and exit from SETUP.
[Advanced] → [Memory Configuration] → [Sparing]
Install memory devices in the following order:
Group 1 → Group 3 → Group 5 for memory branch 0
Group 2 → Group 4 → Group 6 for memory branch 1
The following sparing can be neither configured nor set.
Sparing to anther memory branch
Specification of arbitrary memory devices as spare. The group of the largest number
within a specific memory branch can be specified as spare.
The table below lists examples of DIMM installation patterns enabling the online spare memory
feature to be used. While the following patterns are provided for memory branch 0, the same
patterns can also be adapted to memory branch 1.
Memory Blanch #0
(Group #)
Capacity
Example
#1 #3 #5 Physical Logical
1 1GB 1GB - 4GB 1GB
2 1GB 1GB 1GB 3GB 2GB
3 2GB 2GB - 4GB 3GB
4 2GB 2GB 2GB 6GB 5GB
5 4GB 4GB - 8GB 6GB
6 4GB 4GB 4GB 12GB 10GB
7 8GB 8GB - 16GB 12GB
8 8GB 8GB 8GB 24GB 20GB
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