Memory Modes - Acer ALTOS R910 Series User Manual

Memory modes

The server supports several memory features that allow flexibility in
performance, redundancy, and ability to upgrade. The system BIOS can
be configured as follows:
• Maximum compatibility
• Maximum performance
• Memory sparing
• Memory RAID
• Memory mirroring
Only one of these memory modes can be selected at one time and the
BIOS defaults to maximum performance mode. For non-redundant
modes, support is also included for memory sparing, where a portion
of each memory board is reserved for failover.
The table below lists the memory hot-plug support under different
memory modes.
Memory
Maximum
Hot-plug
Compatibility
Operation
Hot-add Supported
Hot-replace
Hot-upgrade
Memory boards configured using RAID or mirroring are in redundant
mode. If a memory board that is configured in a redundant mode has a
DIMM or memory board fault, the memory board and/or DIMM
containing the fault can be hot-removed or hot-replaced while the
system is powered on.
Hot-replace means you can replace a memory board with another
memory board of identical size. This operation is supported in memory
RAID and memory mirroring modes.
Hot-add means you can add a memory board to a previously
unoccuppied slot. This requires OS support and is supported in
maximum compatibility and memory mirroring modes.
Hot-upgrade means you can replace an existing memory board with a
memory board that contains more memory capacity. This requires OS
support and is supported by the memory RAID mode only.
Maximum Memory
Performance Mirroring
Supported
Supported
163
Memory
RAID
Supported
Supported