You can remove and replace a faulty dual in-line memory module (DIMM) from a control enclosure. You
can also use this procedure to add DIMMs to increase the memory capacity of the node
canister.
About this task
Notes:
The memory modules are sensitive to electrostatic-discharge (ESD). Take precautions to
avoid damage from static electricity. When you remove or replace this part, you must follow
recommended procedures for handling ESD-sensitive devices.
No tools are required to complete this task. Do not remove or loosen any screws.
The hardware (e.g. labels on the printed circuit board) identifies the processors as CPU0 and
CPU1, but the Spectrum Virtualize error messages identify them as CPU1 and CPU2.
The hardware (e.g. labels on the printed circuit board) identifies the
processors as CPU0 and CPU1, but the Spectrum Virtualize error messages identify them as CPU1 and
CPU2.
As Figure 1 shows, each node canister contains
two processors, which are identified as CPU 1 and CPU 2.Figure 1. Location of CPUs and DIMM slots
A CPU processor has six memory channels, which are labeled A-F.
Each memory channel has 2 DIMM slots, numbered 0-1. For example, DIMM slots A0 and A1 are in
memory channel A.
On the system board, the DIMM slots are labeled according to their memory channel and slot. They are associated with the CPU nearest to their DIMM
slots.
You do not have to replace all of the memory modules at the same time.
However, when you install memory modules, be sure that you follow the configurations that are
described in the following table.
To ensure proper cooling and a steady flow of air from the fan modules in each
node canister, blank DIMMs must be inserted in any slot that does not contain a memory
module.
Table 1. Available memory configurations for a FlashSystem 9200 control enclosure
DIMM slot
Memory configuration options
256 GB (base)
768 GB
1,536 GB
F0
Blank
32 GB
32 GB
F1
Blank
Blank
32 GB
E0
Blank
32 GB
32 GB
E1
Blank
Blank
32 GB
D0
32 GB
32 GB
32 GB
D1
Blank
Blank
32 GB
CPU 0
A1
Blank
Blank
32 GB
A0
32 GB
32 GB
32 GB
B1
Blank
Blank
32 GB
B0
Blank
32 GB
32 GB
C1
Blank
Blank
32 GB
C0
Blank
32 GB
32 GB
C0
Blank
32 GB
32 GB
C1
Blank
Blank
32 GB
B0
Blank
32 GB
32 GB
B1
Blank
Blank
32 GB
A0
32 GB
32 GB
32 GB
A1
Blank
Blank
32 GB
CPU 1
D1
Blank
Blank
32 GB
D0
32 GB
32 GB
32 GB
E1
Blank
Blank
32 GB
E0
Blank
32 GB
32 GB
F1
Blank
Blank
32 GB
F0
Blank
32 GB
32 GB
Memory per CPU
64 GB
192 GB
384 GB
Memory per node canister
128 GB
384 GB
768 GB
Total memory per control enclosure
256 GB
768 GB
1,536 GB
If a node error 510 is logged (error code 1022 in the system log), the sense data includes the
following information, which you can also use to determine which DIMMs need to be replaced.
Detected memory size in MB.
Expected memory size in MB.
A list with one entry per DIMM slot, which shows the size of the DIMM in GB for each slot.
Procedure
Identifying failed DIMMs
If you are replacing failed DIMMs, use the service assistant or the System
Event Log in the management GUI to obtain the sense data. This data shows the detected
and expected memory sizes and the size of the DIMM in each slot.
Identify the column in the memory configuration table that contains the expected configuration.
To do so, match the expected memory size from the error sense data to the column that has the same
node canister total memory.
Compare the size of the DIMM reported in each slot in the error data with the expected DIMM
size for the slot index and node canister total memory size that is shown in the memory
configuration table. For each mismatch, the DIMM must be replaced with the size of DIMM that is
indicated in the table. See the Replaceable units topic in the Reference section for the
correct FRU part number for each size of DIMM.
As Figure 2 shows, the
DIMM locations are identified on the system board.Figure 2. Identifying DIMM locations
Press the locking tabs on the side of the DIMM to eject it.
Lift the DIMM up and out of the slot.
If you have other tasks to complete inside the control enclosure, do those tasks now.
Replacing or adding the
DIMM
Important: If you are adding memory to a node canister, you must remove that node
from the system configuration before you start the following procedure. To do so, you can use the
management GUI or the CLI.
To use the management GUI, right-click the node canister and select
Remove.
To use the CLI, enter the following command, where object_id | object_name
identifies the node canister that receives the additional
memory:
rmnodecanister object_id | object_name
If you are replacing a faulty DIMM with a new one from FRU stock, you do not need to remove
the node canister from the system configuration.
Touch the static-protective package that contains the new DIMM to any unpainted metal surface
on the node canister. Remove the DIMM from the package.
Turn the DIMM so that the DIMM keys align correctly with the connector on the main board.
Insert the DIMM into the connector by aligning the edges of the DIMM with the slots at the ends
of the DIMM connector, as shown in Figure 3.
Figure 3. Installing the DIMM
Attention: If there is a gap between the DIMM and the retaining clips, the DIMM is not
correctly inserted; open the retaining clips, remove the DIMM, and then reinsert it.
Firmly press the DIMM straight down into the connector by applying pressure on both ends of the
DIMM simultaneously. The retaining clips snap into the locked position when the DIMM is firmly
seated in the connector.
Repeat steps 11 through 14 until all the new or replacement DIMMs are
installed.
The memory modules are sensitive to electrostatic-discharge (ESD). Take precautions to
avoid damage from static electricity. When you remove or replace this part, you must follow
recommended procedures for handling ESD-sensitive devices.
Attention: If there is a gap between the DIMM and the retaining clips, the DIMM is not correctly inserted; open the retaining clips, remove the DIMM, and then reinsert it.