HP ProLiant ML570 G4 Server - Manual (Page 48)

Hardware options installation 48
Advanced Memory Protection
Mode Hot-Replace
Supported Hot-Add
Supported
Advanced ECC X
Online Spare Memory
Hot-Plug Mirrored Memory X
Hot-Plug RAID Memory X
When the server is configured for mirrored or RAID memory, you can perform a hot-replacement
procedure in the following manner without powering down the server or experiencing server downtime:
1. Remove a memory board.
2. Replace failed or degraded DIMM(s).
3. Reinstall the memory board in the slot from which it was removed.
The replacement procedures in this section apply to both hot-plug and non-hot-plug memory procedures,
except as noted.
IMPORTANT: Be sure to power down the server when performing board removal procedures in a server
that is not configured for Mirrored or Hot-Plug RAID Memory.
Observe the following warnings when performing a hot-plug replacement procedure.
WARNING: Always comply with all electrostatic and thermal guidelines to prevent bodily
injury and ensure a properly functioning system when performing hot-plug operations.
WARNING: To prevent personal injury from hazardous energy:
• Remove watches, rings, or other metal objects.
• Use tools with insulated handles.
• Do not place tools or metal parts on top of batteries.
Removing and installing a memory board (hot-plug)
NOTE: The ProLiant ML570 G3/G4 memory board operates at different front-side bus speeds:
• In HP ProLiant ML570 Generation 4 Servers, the G3/G4 memory board operates at 667 MHz
or 800 MHz, depending on the front-side bus speed of the installed processor.
• In HP ProLiant ML570 Generation 3 Servers, the G3/G4 memory board operates at 667 MHz
with no performance gain over ProLiant ML570 G3 memory boards.
IMPORTANT: Installing a ProLiant ML570 G3 memory board in an HP ProLiant ML570 G4 Server forces
the front-side bus speed to 667 MHz. If the installed processor has an 800-MHz front-side bus, a message
displays at POST.
IMPORTANT: The HP ProLiant ML570 G4 Server does not support hot-add of ProLiant ML570 G3 memory
boards. Inserting the memory board generates an audio alert and the memory board LEDs flash. The
memory board does not power up. The board can be removed without powering down the server.
1. Do one of the following:
— Unlock and remove the bezel ("
Unlock and remove the tower bezel " on page 25 ).
— Extend the server from the rack (on page 23 ).
2. Remove the access panel (on page 27 ).
3. Determine which memory board is to be removed by locating the memory board that displays an
amber Board Status LED. The Board Removal LED must be green. Take note of the failed DIMM, if
applicable.