General memory module installation guidelines
Note
Memory configurations that fail to observe these guidelines can prevent your
appliance from booting, stop responding during memory configuration, or operating
with reduced memory.
The following are the recommended guidelines for installing memory modules:
l
RDIMMs and LRDIMMs must not be mixed.
l
Up to two RDIMMs can be populated per channel.
l
Up to two LRDIMMs can be populated per channel.
l
If memory modules with different speeds are installed, they will operate at the
speed of the slowest installed memory module(s) or slower depending on
appliance DIMM configuration.
l
Populate memory module sockets only if a processor is installed. For single-
processor appliance, sockets A1 to A12 are available. For dual-processor appliance,
sockets A1 to A12 and sockets B1 to B12 are available.
l
Populate all the sockets with white release tabs first, and then followed by the
black release tabs.
l
Mixing of more than one memory module capacities in an appliance is not
supported.
l
In a dual-processor configuration, the memory configuration for each processor
should be identical. For example, if you populate socket A1 for processor 1, then
populate socket B1 for processor 2, and so on.
l
VxRail appliances require that you populate six memory modules per processor for
single processor configurations and twelve memory modules per processor for
dual-processor configurations. One memory module per channel at a time to
maximize performance.
Expansion cards and expansion card riser
An expansion card in the appliance is an add-on card that can be inserted into an
expansion slot on the system board or riser card to add enhanced functionality to the
appliance through the expansion bus.
Note
To avoid data loss, ensure that you refer to the procedures in the SolVe Desktop
application before performing any memory or expansion card replacement or upgrade
procedures.
Note
A System Event Log (SEL) event is logged if an expansion card riser is unsupported or
missing. It does not prevent your appliance from turning on and no BIOS POST
message or F1/F2 pause is displayed.
Replacing and adding hardware
44
VxRail Appliances on 14th Generation PowerEdge
P Series, V Series, and S Series Appliance Owner's Manual
