Silicon Graphics InfiniteStorage 4000 Series System Upgrade Manual page 60

Upgrading the Cache
Memory DIMM in the
E5400 Controller-Drive
Trays
52
Figure 38 Controller Cover and Internal Parts
13. Remove the top cover from both controller canisters.
14. Go to "Upgrading the Cache Memory DIMM in the E5400 Controller-Drive
Trays" on page 52.
If you are upgrading the cache memory DIMMs in one controller canister, you must
increase the capacity of the cache memory DIMMs in the other controller canister.
You also must increase the capacity of the cache backup memory device in both
controller canisters if you upgrade the cache memory DIMMs from 6 GB to 12 GB.
Make sure that the sizes of the cache memory DIMMs to which you are upgrading in
both controller canisters are of equal capacity. The following table lists the cache
memory DIMM configurations.
1. Top Cover Latch Buttons