Cpu Modules; Storage Bays - NEC Express5800 320La User Manual

CPU Modules

The server has two CPU modules that provide Dual Modular Redundancy (DMR). The
CPU modules are numbered 1 and 2, left to right as seen from the front of the system.
Each CPU module has two status indicators that are listed along with a description of
each in Table 1-3. Table 1-8 summarizes the features of a CPU module.
Feature
Upgradable
multiple processor
slots
Upgradable
memory
SMP
Fan
The system runs identical applications in both CPU modules in lockstep. Thus, if one
CPU module fails, the second CPU module takes over the processing without any
interruption to the current application running on the system. Note that this type of
failure is transparent to the user.
In simplex mode the system is operating with only one CPU module and one PCI
module. Thus, the failure of one CPU module or one PCI module causes the whole
system to fail. A fault-tolerant system should not run in the simplex mode for any
longer than necessary for upgrading or repair.

Storage Bays

The server has a storage area containing six storage bays that support six hard disk
drives (three logical disks). The hard disk drives are CRUs, hot pluggable, and
redundant. The disk slots are physically numbered 1 – 6, left to right as seen from the
front of the system. The disk drives SCSI ID numbers are 0, 1, 2 for each group of
logical disk drives and the first mirrored pairs are physical drives 1 and 4 that contain
the boot software, as shown below.
SCSI ID 0
Disk #1
Table 1-8. Features of the CPU Module
Description
Two processor sockets are available on the CPU board for one or two
processors.
Four DIMM sockets on the CPU board. Can contain a minimum of 256 MB
up to a maximum of 2 GB of Synchronous Dynamic Random-Access
(SDRAM) system memory.
Supports two-way Symmetric Multiprocessing (SMP) when two processors
are installed.
Two integrated fans that provide cooling for both the CPU module and hard
disk drives.
Group 1
SCSI ID 1 SCSI ID 2
Disk #2 Disk #3
Group 2
SCSI ID 0 SCSI ID 1
Disk #4 Disk #5
System Overview 1-15
SCSI ID 2
Disk #6