IBM 8863 - eServer xSeries 366 Service Manual page 127

v Memory ProteXion reassigns memory bits to new locations within memory when
recoverable errors have been detected.
When a recoverable error is found by memory scrubbing, the Memory ProteXion
feature writes the data that was to be stored in the damaged memory locations to
spare memory locations within the same DIMM.
Removing and replacing a memory card
At least one memory card with one pair of DIMMs must be installed for the server
to operate correctly.
Replacing a memory card: Complete the following steps to replace a memory
card:
1. Read the safety information that begins on page vii, and "Handling
static-sensitive devices" on page 100.
2. Turn off the server and peripheral devices, and disconnect the power cords and
all external cables necessary to replace the device.
3. Remove the cover from the server (see "Removing the cover and bezel" on
page 101).
4. Prepare the new memory card to go into the server:
a. Touch the static protective package containing the memory card to any
unpainted surface on the outside of the server. Then, remove the memory
card from the package.
b. Place the memory card on a flat, static protected surface with the DIMM
connectors facing up.
c. Install memory DIMMs in the memory card (see "Installing memory modules"
on page 112).
5. Remove the memory card from the server:
a. Make sure that the retention levers on the edge of the memory card are fully
open.
b. Lift the memory card out of the server and set it aside.
6. Replace the memory card:
a. Grasp the new memory card by the retention levers and turn the memory
card so that the connector aligns with the connector on the microprocessor
board.
b. Insert the memory card into the memory card connector.
c. Press the memory card into the connector and close the retention levers.
7. Reconnect external cables and power cords.
Hot-replacing a memory card: To hot-replace a memory card memory mirroring
must be enabled. See "Active Memory" on page 110 for information on how to
enable memory mirroring.
Complete the following steps to hot-replace a memory card in the server:
Attention: Static electricity that is released to internal server components when
the server is powered-on might cause the server to halt, which could result in the
loss of data. To avoid this potential problem, always use an electrostatic-discharge
wrist strap or other grounding system when working inside the server with the
power on.
1. Read the safety information beginning on page v and "Installation guidelines" on
page 99.
Chapter 4. Removing and replacing server components
111