Preparing the 9009-41A, 9009-41G, 9009-42A, 9009-42G, 9223-42H, or 9223-42S system to install memory modules

To prepare the system to install memory modules, complete the steps in this procedure.

Before you begin

Record the plugging order of the memory module slots for the installation.

This information helps you to plan memory module installation in the system.

• The system supports memory modules of 8GB, 16 GB, 32 GB, 64 GB, and 128 GB.
• A system with one system processor supports a minimum of two (a pair of) memory modules and provides a minimum of 16 GB memory.
• A system with two system processors supports a minimum of four (two pairs of) memory modules and provides a minimum of 32 GB memory.
• A pair of memory modules must be the same size, rank, and memory density.
• Memory locations are assigned to groups; memory modules in each of the groups must be the same size, rank, and memory density.
• Groups of memory modules can be of different sizes, ranks and memory densities than other groups.
• Each system processor supports 2, 4, 6, 8, 12, or 16 memory modules.
• 128 GB memory modules that are located in the same channel must be made by the same manufacturer (Samsung Electronics Co., Ltd. or SK hynix Inc.). Channels are defined in pairs as follows: P1-C33 and P1-C34, P1-C17 and P1-C18, P1-C31 and P1-C32, P1-C15 and P1-C16, P1-C35 and P1-C36, P1-C21 and P1-C22, P1-C37 and P1-C38, P1-C19 and P1-C20, P1-C41 and P1-C42, P1-C25 and P1-C26, P1-C39 and P1-C40, P1-C23 and P1-C24, P1-C43 and P1-C44, P1-C29 and P1-C30, P1-C45 and P1-C46, and P1-C27 and P1-C28.
• If you are installing 128 GB memory modules that are manufactured by Samsung Electronics Co., Ltd. in a new or existing configuration so that the resulting configuration will have more than half of the allowable memory module locations populated, the system firmware level must be FW950.50, or later.

Table 1 lists the feature codes of the supported memory modules.

Table 1. Memory feature codes

Size	Feature code	Rank	Memory Density
8 GB	EM60, EM6G	1R	4 Gb
16 GB	EM62, EM6J	1R	8 Gb
32 GB	EM63, EM6K	2R	8 Gb
64 GB	EM64, EM6L	2R	8 Gb
64 GB	EM7B	2R	16 Gb*
128 GB	EM65, EM6M	2R	8 Gb
128 GB	EM7C	2R	16 Gb*
Note: * The system firmware level must be FW950.00, or later.

The plugging rules for memory modules depend on the number of system processors:

• Plugging rules for systems with one system processor
• Plugging rules for systems with two system processors

Plugging rules for systems with one system processor

One system processor supports 2, 4, 6, 8, 12, or 16 memory modules. Figure 1 and Figure 2 show the locations of the memory modules for systems with one system processor. After the first four pairs of memory modules are installed, the remaining memory slots must be filled four at a time versus two at a time.

The system has groups for the memory modules. All of the memory modules in a group must be the same size and type. The memory in one group can be different than another group.

When the system contains eight or fewer memory modules, extra rules against mixing memory of different ranks (1R or 2R) apply. These positions must have the same rank; either 1R or 2R, but they cannot contain both 1R and 2R:

• Sequences 1 and 3: P1-C17, P1-C33, P1-C15, and P1-C31
• Sequences 2 and 4: P1-C22, P1-C36, P1-C20, and P1-C38

Table 2. Memory groupings for a single-processor system

Memory group	Positions
A	P1-C17, P1-C18, P1-C33, and P1-C34
B	P1-C15, P1-C16, P1-C31, and P1-C32
C	P1-C21, P1-C22, P1-C35, and P1-C36
D	P1-C19, P1-C20, P1-C37, and P1-C38

Table 3 shows that the memory modules must be plugged into the system in a certain sequence and position.

Table 3. Plugging sequence for memory modules for a system with one system processor

Total memory modules	Sequence	Memory modules to install	Memory locations
2	1	2	P1-C17 and P1-C33. Minimum supported memory.
4	2	2	P1-C22 and P1-C36
6	3	2	P1-C15 and P1-C31
8	4	2	P1-C20 and P1-C38
12	5	4	P1-C18 and P1-C34 (group A; must match the size and type of P1-C17 and P1-C33) and P1-C16 and P1-C32 (group B; must match the size and type of P1-C15 and P1-C31)
16	6	4	P1-C21 and P1-C35 (group C; must match the size and type of P1-C22 and P1-C36). and P1-C19 and P1-C37 (group D; must match the size and type of P1-C20 and P1-C38)

Plugging rules for systems with two system processors

Two system processors support 4, 6, 8, 10, 12, 14, 16, 20, 24, 28, or 32 memory modules. Figure 3 shows the locations of the memory modules for systems with two system processors. After the first eight pairs of memory modules are installed, the remaining memory slots must be filled four at a time (versus two at a time).

The system has groups for the memory modules. All of the memory modules in a group must be the same size and type. The memory in one group can be different than another group.

Table 4. Memory groupings for a two-processor system

Memory groupings	Positions
A	P1-C17, P1-C18, P1-C33, and P1-C34
B	P1-C15, P1-C16, P1-C31, and P1-C32
C	P1-C21, P1-C22, P1-C35, and P1-C36
D	P1-C19, P1-C20, P1-C37, and P1-C38
E	P1-C25, P1-C26, P1-C41, and P1-C42
F	P1-C23, P1-C24, P1-C39, and P1-C40
G	P1-C29, P1-C30, P1-C43, and P1-C44
H	P1-C27, P1-C28, P1-C45, and P1-C46

When the system contains 16 or fewer memory modules, extra rules against mixing memory of different ranks (1R or 2R) apply. These positions must have the same rank; either 1R or 2R, but they cannot contain both 1R and 2R:

• Sequences 1 and 5: P1-C17, P1-C33, P1-C15, and P1-C31
• Sequences 2 and 6: P1-C25, P1-C41, P1-C23, and P1-C39
• Sequences 3 and 7: P1-C22, P1-C36, P1-C20, and P1-C38
• Sequences 4 and 8: P1-C30, P1-C44, P1-C28, and P1-C46

Table 5 shows that the memory modules must be plugged into the system in a certain sequence and position.

Table 5. Plugging sequence for memory modules for a system with two system processors

Total memory modules	Sequence	Memory modules to install	Memory locations
2	1	2	P1-C17 and P1-C33. Must have another pair that is installed.
4	2	2	P1-C25 and P1-C41. Minimum supported memory.
6	3	2	P1-C22 and P1-C36
8	4	2	P1-C30 and P1-C44
10	5	2	P1-C15 and P1-C31
12	6	2	P1-C23 and P1-C39
14	7	2	P1-C20 and P1-C38
16	8	2	P1-C28 and P1-C46
20	9	4	P1-C18 and P1-C34 (group A; must match the size and type of P1-C17 and P1-C33) and P1-C16 and P1-C32 (group B; must match the size and type of P1-C15 and P1-C31)
24	10	4	P1-C26 and P1-C42 (group E; must match the size and type of P1-C25 and P1-C41) and P1-C24 and P1-C40 (group F; must match the size and type of P1-C23 and P1-C39)
28	11	4	P1-C21 and P1-C35 (group C; must match the size and type of P1-C22 and P1-C36). and P1-C19 and P1-C37 (group D; must match the size and type of P1-C20 and P1-C38)
32	12	4	P1-C29 and P1-C43 (group G; must match the size and type of P1-C30 and P1-C44) and P1-C27 and P1-C45 (group H; must match the size and type of P1-C28 and P1-C46)

1. Ensure that the required software is installed to support the new feature. See the Power Systems Prerequisites website.
2. Stop the system. For instructions, see Stopping a system.
3. Label and disconnect the power cords from the system unit.
   See Figure 4 or Figure 5.

   Notes:

   • This system might be equipped with two or more power supplies. If the removing and replacing procedures require the system power to be turned off, ensure that all the power sources to the system are disconnected.
   • The power cord (B) is fastened to the system with hook-and-loop fastener (A). If you are placing the system in a service position after you disconnect the power cords, ensure that you unstrap the fastener.

   

   

   (L003)

   

   or

   

   or

   

   or

   

   or

   

   

   

   DANGER

   Multiple power cords. The product might be equipped with multiple AC power cords or multiple DC power cables. To remove all hazardous voltages, disconnect all power cords and power cables. (L003)
4. For a rack-mounted system, open the side latches (A) and pull the latches to slide the system unit fully into the service position until the slides click and hold the system unit securely. Ensure that the screws inside the latches are not secured to the rack.
   See the following figure.

   Remove the hook-and-loop fasteners that secure the cable management arms. Ensure that the cable management arms can move freely. Ensure that the cables at the rear of the system do not catch or bind as you pull the system unit into the service position.

   Do not pull out or install any drawer or feature if the rack stabilizer brackets are not attached to the rack. Do not pull out more than one drawer at a time. The rack might become unstable if you pull out more than one drawer at a time.

   

   

5. Attach the electrostatic discharge (ESD) wrist strap. Your system has ESD jacks on the front and on the rear of the system as shown in the following figure. Plug the ESD wrist strap into the ESD jack.
   Attention:

   • Attach an electrostatic discharge (ESD) wrist strap to the front ESD jack, to the rear ESD jack, or to an unpainted metal surface of your hardware to prevent the electrostatic discharge from damaging your hardware.
   • When you use an ESD wrist strap, follow all electrical safety procedures. An ESD wrist strap is used for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
   • If you do not have an ESD wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.

   

6. Remove the service access cover.
   For a rack-mounted system, complete the following steps. Refer to Figure 8.

   Attention: Operating the system without the service access cover on for more than 10 minutes when the system power is turned on might damage the system components.

   1. Release the service cover latch by pushing the release latch (A) in the direction shown.
   2. Slide the cover (B) off the system unit. When the front of the service access cover clears the upper frame ledge, lift the cover up and off the system unit.

   

   For a stand-alone system, complete the following steps. Refer to Figure 9.

   Attention: Operating the system without the service access cover on for more than 10 minutes when the system power is turned on might damage the system components.

   1. Release the latch by pushing the release latch (A) in the direction shown.
   2. Slide the cover (B) off the system unit. When the front of the service access cover has cleared the upper frame ledge, lift the cover up and off the system unit.