Lenovo Storage N4610, User Manual And Hardware Maintenance Manual

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Table 3. Memory module installation rules for storage products with two microprocessors (continued)
CPU1 DIMM CPU2 DIMM
A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3
16
DIMMs
X X X X X X X X X X X X X X X X
24
DIMMs
X X X X X X X X X X X X X X X X X X X X X X X X
The following section explains the memory module installation rules in independent mode, mirroring mode,
sparing mode, and lockstep mode.
Memory module installation order in independent mode
In independent mode, the RAS features are not available. For more information about the RAS features,
refer to the related section in “Features” on page 7.
Notes:
• All memory modules to be installed must be the same type.
• When you install memory modules with different capacity, install the memory module that has the
highest capacity first.
The following table explains the memory module installation order for storage products that have only
one microprocessor (CPU1) installed.
Table 4. Memory module installation order in independent mode for storage products with one microprocessor
CPU1 DIMM
A1 A2 A3 B1 B2 B3
C1 C2 C3
D1 D2 D3
DIMM installation
order
1 5 9 2 6 10 3 7 11 4 8 12
The following table explains the memory module installation order for storage products that have two
microprocessors (CPU1 and CPU2) installed.
Table 5. Memory module installation order in independent mode for storage products with two microprocessors
CPU1 DIMM CPU2 DIMM
A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3
DIMM installation
order
1 9 17 3 11 19 5 13 21 7 15 23 2 10 18 4 12 20 6 14 22 8 16 24
Memory module installation order in mirroring mode
In mirroring mode, the storage product maintains two identical copies of all data in memory and the RAS
features are available. For more information about the RAS features, refer to the related section in “Features”
on page 7.
Notes:
• All memory modules to be installed must be the same type with the same capacity, frequency, voltage,
and number of ranks.
• All memory modules must be installed in pairs.
Chapter 6
.
Replacing hardware
63