Installation guide

16 IBM Eserver xSeries 366 Technical Introduction
For information about performing a hot-add operation, and more information about the
restrictions, see the x366 User’s Guide.
Memory configuration in BIOS
You configure the memory subsystem in the server’s BIOS Setup menu by clicking Advanced
Settings → Memory → Memory Array Setting. Table 3 shows the choices.
Table 3 Memory configuration modes in BIOS
Your memory configuration mode selection depends on the memory features you want to use:
򐂰 Select RBS if you are not using mirroring, hot-swap, or hot-add. This is the
default/standard setting.
򐂰 Select FAMM to enable memory mirroring (and to enable hot-swap).
򐂰 Select HAM to enable hot-add in the future.
We recommend that you do not select the HPMA setting as this disables Memory ProteXion.
Serial Attached SCSI
The x366 has a disk subsystem that is comprised of an Adaptec AIC-9410 Serial Attached
SCSI (SAS) controller and six internal hot-swap drive bays. The x366 does not support RAID
as standard, but the server also supports the addition of the ServeRAID-8i daughter card
(part 13N2227).
Serial Attached SCSI (SAS) is the logical evolution of SCSI. SAS uses much smaller
interconnects than SCSI, while offering SCSI compatibility, reliability, performance, and
manageability. In addition, SAS offers longer cabling distances, smaller form factors and
greater addressability.
Notes:
򐂰 After you have added a memory card with two DIMMs, you cannot add more memory to
that same memory card without powering off the server.
򐂰 Enabling hot-add reserves a portion of the memory map for the memory that may be
hot-added in the future. If you do not plan to use hot-add, we recommend that you not
enable this feature in BIOS.
Mode Memory
ProteXion
Memory-
mirroring
Hot-swap
memory
Hot-add
memory
HPMA (high performance memory array) Disabled Disabled Disabled Disabled
RBS (redundant bit steering)
Yes Disabled Disabled Disabled
FAMM (full array memory mirroring)
Ye s Ye s Yes Disabled
HAM (hot-add memory)
Yes Disabled Disabled Ye s