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Memory
Memory
Your server has four PCI ×16 connectors on the system board for memory boards. Each
memory board has sockets for four DIMMs and supports two DDR2 channels (with two
DIMMs per channel). Memory boards support both single-rank and double-rank, registered
DIMMs. One to four memory boards can be installed.
Installing and removing memory boards
Memory boards can be configured in either redundant or non-redundant configurations.
Memory boards configured using RAID or mirroring are considered redundant. If a memory
or memory board fault occurs on a memory board that is redundantly configured, the
board containing the fault can be removed, and the board or DIMM replaced, while the
system is on. Memory boards that are not redundantly configured (including boards that
are configured with spare memory) must not be removed while the system is on.
The following memory board replacement options are available to this server:
■ Memory hot replace - A failed memory board can be replaced while the system is
on only if its in a RAID or Mirrored configuration. The system will test, initialize, and
rebuild the data on the memory board, then include the board in the system memory
configuration. The replacement is transparent to the operating system. For additional
information, see
“Hot removal and insertion of memory boards” on page 87 .
■ Memory hot add - You can increase the memory capacity of the system while the
operating system is active only if its in a RAID or Mirrored configuration. Memory
can be removed and replaced on only one memory board at a time and the memory
board must be replaced before attempting to remove another board. If your server is
configured for Maximum Compatibility, a new memory board can be added to an
empty slot. The system will test and initialize the new memory, then inform the
operating system. For additional information, see
“Hot removal and insertion of
memory boards” on page 87 .
Caution
Do not attempt to hot replace or hot add a memory board in a
non-redundant configuration. If your server is not configured for
Maximum Compatibility, Memory RAID, or Memory Mirroring in the
BIOS setup utility, you must turn off your server before removing or
installing any memory board or DIMMs.
Caution
Memory board air baffles are installed in memory slots without
memory boards. These air baffles must be removed to install a
memory board. To maintain the correct airflow in your server and
prevent overheating, if you intend to remove a memory board from
your server and not replace it immediately, install a memory board
air baffle in the empty slot.
8510702.book Page 85 Thursday, July 7, 2005 11:21 AM