Oracle ZFS Storage ZS11-2 DIMM

Each processor, P0 and P1, has 12 DIMM slots (D0-D11), six on each processor side. Each DIMM slot supports a single memory channel for a total of 12 DDR5 memory channels per processor (0-11).

The physical layout of the DIMMs and processor(s) is shown in the following figure. When viewing the controller from the front, processor 0 (P0) is on the left.


Figure showing the DIMM and processor layout.

The following table shows memory channels and their associated DIMM slots.

Memory Channels DIMM Slot

0

D3

1

D1

2

D0

3

D5

4

D4

5

D2

6

D8

7

D10

8

D11

9

D6

10

D7

11

D9

As shown in the previous figure, DIMM slots are labeled D0 through D5 to the left of each processor, and D6 through D11 to the right of each processor.

The Oracle ZFS Storage ZS11-2 server supports up to 24 DDR5 DIMMs, 12 per processor socket. The DIMMs have 64 GB and 96 GB dual-rank registered DIMMs capacity.

The following table shows the DIMM memory slot population requirements for Oracle ZFS Storage ZS11-2. Optimal performance is generally achieved by populating the DIMMs so that the memory is symmetrical, or balanced. Symmetry is achieved by adhering to the following guidelines:

  • The system supports four memory configurations: 512 GB (8x 64 GB), 1.0 TB (16x 64 GB), 1.5 TB (24x 64 GB), and 2.25 TB (24x 96 GB). There is 1 DIMM per channel (1DPC) and each DIMM channel is composed of a black slot. All memory installed in the system operates at 6400 MT/s rate.
  • Populate DIMMs of the same size in multiples of eight (four for each processor).
  • The DIMM population for each processor (P0 and P1) must be identical.
  • DIMM channels per processor are arranged from left to right (as you face the front of the system) in the following order: D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11

In the following table, X represents a populated slot and E represents an empty slot.

DIMMs per CPU Channel Population Order DIMM Memory Slots CPU-0/1

12 DIMMs per CPU

Number

Installed

DO D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11

X  X  X  X  X  X  X  X  X  X  X   X

8 DIMMs per CPU

Number

Installed

DO D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11

E  X  E  X  X  X  X  X  X  E  X   E

4 DIMMs per CPU

Number

Installed

DO D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11

E  E  E  X  E  X  X  E  X  E  E   E