Dell PowerVault DL4000 Dell PowerVault DL4000 Systems Owner's Manual - Page 33

Mode-Specific Guidelines, Memory Configuration, Removing Memory Modules

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channel 2: slots B3, B7, and B11 channel 3: slots B4, B8, and B12 Mode-Specific Guidelines Four memory channels are allocated to each processor. The allowable configurations depend on the memory mode selected. NOTE: x4 and x8 DRAM based DIMMs can be mixed providing support for RAS features. However, all guidelines for specific RAS features must be followed. x4 DRAM based DIMMs retain Single Device Data Correction (SDDC) in memory optimized (independent channel) mode. x8 DRAM based DIMMs require Advanced ECC mode to gain SDDC. The following sections provide additional slot population guidelines for each mode. Memory Optimized (Independent Channel) Mode This mode supports SDDC only for memory modules that use x4 device width and does not impose any specific slot population requirements. Memory Configuration The following table shows the memory configuration for a two processor configuration. NOTE: 2R in the following table indicates single DIMMs. Table 1. Memory Configuration System DIMM Size (in Number of Capacity (in GB) GB) DIMMs 32 4 8 DIMM Rank, Organization, and Frequency 2R, x8, 1333 MT/s, DIMM Slot Population A1, A2, A3, A4 B1, B2, B3, B4 Removing Memory Modules WARNING: The memory modules are hot to the touch for some time after the system has been powered down. Allow time for the memory modules to cool before handling them. Handle the memory modules by the card edges and avoid touching the components on the memory module. CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product. CAUTION: To ensure proper system cooling, memory-module blanks must be installed in any memory socket that is not occupied. Remove memory-module blanks only if you intend to install memory in those sockets. 1. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet and peripherals. 2. Open the system. 3. Remove the cooling shroud. 4. Locate the appropriate memory module socket(s). 33

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channel 2: slots B3, B7, and B11
channel 3: slots B4, B8, and B12
Mode-Specific Guidelines
Four memory channels are allocated to each processor. The allowable configurations depend on the memory mode
selected.
NOTE:
x4 and x8 DRAM based DIMMs can be mixed providing support for RAS features. However, all guidelines for
specific RAS features must be followed. x4 DRAM based DIMMs retain Single Device Data Correction (SDDC) in
memory optimized (independent channel) mode. x8 DRAM based DIMMs require Advanced ECC mode to gain
SDDC.
The following sections provide additional slot population guidelines for each mode.
Memory Optimized (Independent Channel) Mode
This mode supports SDDC only for memory modules that use x4 device width and does not impose any specific slot
population requirements.
Memory Configuration
The following table shows the memory configuration for a two processor configuration.
NOTE:
2R in the following table indicates single DIMMs.
Table 1. Memory Configuration
System
Capacity (in GB)
DIMM Size (in
GB)
Number of
DIMMs
DIMM Rank, Organization,
and Frequency
DIMM Slot Population
32
4
8
2R, x8, 1333 MT/s,
A1, A2, A3, A4
B1, B2, B3, B4
Removing Memory Modules
WARNING: The memory modules are hot to the touch for some time after the system has been powered down.
Allow time for the memory modules to cool before handling them. Handle the memory modules by the card edges
and avoid touching the components on the memory module.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your
warranty. Read and follow the safety instructions that came with the product.
CAUTION: To ensure proper system cooling, memory-module blanks must be installed in any memory socket that is
not occupied. Remove memory-module blanks only if you intend to install memory in those sockets.
1.
Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet and
peripherals.
2.
Open the system.
3.
Remove the cooling shroud.
4.
Locate the appropriate memory module socket(s).
33