Planning Storwize V7000 Gen3 control enclosure cache memory

The control enclosure uses memory features to control the initial amount of memory and subsequent memory upgrades.

Each of the six memory channels in each CPU has two DIMM slots. A total of 12 DIMM slots per CPU and 24 DIMM slots are available per node canister and 48 DIMM slots are available per enclosure. You can install distinct memory configurations in those 24 DIMM slots in each node canister. (Each canister must have the same amount of memory and the same configuration.)

Memory configurations for each control enclosure

The following table shows the available memory configuration for each Storwize® V7000 Gen3 control enclosure. To ensure proper cooling and a steady flow of air from the five fan modules in each node canister, blank DIMMs must be inserted in any slot that does not contain a memory module.

Initially, each control enclosure ships with 128 GB, divided as 64 GB in each node canister that uses four 16 GB DIMMs in each node canister. You can upgrade memory from 4 to 24 DDR4 (288p socket) DIMMs in 24 DIMM slots in each node canister, supported as base memory and cumulative, sequential upgrades:
  • 64 GB per node canister as 4 x 16 GB DIMMs (default base installation)
  • 128 GB per node canister as 8 x 16 GB DIMMs (the first upgrade of 64 GB raises the cumulative total to 128 GB total memory per canister)
  • 192 GB per node canister as 12 x 16 GB DIMMs (the second upgrade of 64 GB raises the cumulative total to 192 GB total memory per canister)
  • 576 GB per node canister as 12 x 16 GB DIMMs and 12 x 32 GB DIMMs (the third upgrade of 384 GB raises the cumulative total to 576 GB total memory per canister)
    Note: The control enclosure has two canisters. To reach the system total cache of 1,152 GB, multiply the above figure of 576 GB by two.
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 Storwize V7000 Gen3 control enclosure
Total Memory per Control Enclosure 128 GB (base) 256 GB 384 GB 1,152 GB
Features ACG0 ACG0

+ ACGA

 ACG0

+ ACGA (x2)

 ACG0

+ ACGA (x2) + ACGB
 
F0 Blank Blank 16 GB 32 GB
F1 Blank Blank Blank 16 GB
E0 Blank 16 GB 16 GB 32 GB
E1 Blank Blank Blank 16 GB
D0 16 GB 16 GB 16 GB 32 GB
D1 Blank Blank Blank 16 GB
CPU 0
A1 Blank Blank Blank 16 GB
A0 16 GB 16 GB 16 GB 32 GB
B1 Blank Blank Blank 16 GB
B0 Blank 16 GB 16 GB 32 GB
C1 Blank Blank Blank 16 GB
C0 Blank Blank 16 GB 32 GB
 
C0 Blank Blank 16 GB 32 GB
C1 Blank Blank Blank 16 GB
B0 Blank 16 GB 16 GB 32 GB
B1 Blank Blank Blank 16 GB
A0 16 GB 16 GB 16 GB 32 GB
A1 Blank Blank Blank 16 GB
CPU 1
D1 Blank Blank Blank 16 GB
D0 16 GB 16 GB 16 GB 32 GB
E1 Blank Blank Blank 16 GB
E0 Blank 16 GB 16 GB 32 GB
F1 Blank Blank Blank 16 GB
F0 Blank Blank 16 GB 32 GB
 
Memory per CPU 32 GB 64 GB 96 GB 288 GB
Memory per node canister 64 GB 128 GB 192 GB 576 GB
Total memory per control enclosure 128 GB 256 GB 384 GB 1,152 GB

Node canister orientation for DIMMs

Figure 1 shows the location of the CPUs and the DIMM slots within a node canister. The node canister chassis is oriented with the three PCIe networking adapters in card risers to the right (rear). Three fan modules to the left sit atop the NVMe-attached FlashCore Modules or other Flash drives at the front of the node canister. This is the proper orientation for the node canister because the DIMM labels are easily read. DIMM slots A0 and D0 are shown for each CPU.
Figure 1. Location of CPUs and DIMM slots within the node canister
Location of CPUs and DIMM slots

Closeup view of DIMM slot labels

White labels on the printed circuit board identify the DIMM slots. For example, Figure 2 shows slots C0, C1, and B0.
Figure 2. DIMM slot labels printed in white on the circuit board of the node canister
Close up view of DIMM slot labels