Technical data

Chapter 2: Upgrading Trays in the Storage Array 17
2. Choose one of the following options:
— To upgrade cache memory DIMM – Go to step 3.
— To add an additional cache memory DIMM – Go to step 4.
3. Remove the cache memory DIMMs from their slots on the controller card. Refer
to the following figure.
a. Pull back on each ejector handle to disengage the cache memory DIMM pins
from the slot on the controller card.
b. Lift the cache memory DIMM out of the slot.
c. Place the cache memory DIMM that you removed on an a flat, static-free
surface.
Figure 4 Removing a Cache Memory DIMM
1. Cache Memory DIMM
2. Ejector Handles
4. Install the new cache memory DIMM.
a. Align the new cache memory DIMM in the slot.
b. Gently push down on the cache memory DIMM to seat the pins into the slot.
The ejector handles rise up as the cache memory DIMM is inserted into the
slot. When these handles are in the vertical position, the cache memory
DIMM is fully engaged and is locked in place.
5. Repeat this procedure for the other controller canister.
6. Go to "Upgrading a Cache Backup Memory Device in the CE7900 Controller
Canister" on page 17.
Upgrading a Cache
Backup Memory
Device in the CE7900
Controller Canister
The cache backup memory device provides a backup for the cache memory DIMM.
The size of the cache backup memory device must equal the capacity of the cache
memory DIMM.
You must increase the size of the cache backup memory device in both controller
canisters. The following table lists the cache backup memory device configurations.