System Overview 1-3
This server system is designed for minimum downtime. To this end, the BSU includes
or has the option to include the following:
! Chassis that supports up to three power supplies (depending on the configuration).
An additional power supply can be added to provide redundant power (i.e., the
system will continue to operate with a single power supply failure).
! Self-contained power supplies that can be easily installed or removed from the back
of the chassis. If optional power system redundancy is installed, the power supply
units are then hot-swappable and can be easily installed or removed from the back of
the chassis without turning the system power off.
! Modular fan units that can be easily installed or removed from the top of the chassis.
Each modular fan unit can contain up to two fans depending upon system
configuration.
! Cooling system redundancy where the system will continue to operate in the event of
a fan failure or having cabinet temperatures approaching the threshold limit, the
redundant fans will switch to maximum operating speed.
! SCSI drive bays accessible from the front of the chassis.
! Hot-swap SCSI disk drive backplane; a failed drive can be removed and replaced
with a new drive without system power being turned off (if an optional Redundant
Array of Independent Disks (RAID) controller is installed.)
! High degree of SCSI disk fault tolerance and advanced disk array management
features through the use of RAID technology, if an optional RAID controller is
installed.
! Hardware monitors (temperature and voltage) and software monitors to indicate
failures.
! Easy access to all parts for service.
The DEU (tower-based system only) includes or has the option to include the
following:
! Chassis that supports up to two power supplies (depending on the configuration). An
additional power supply can be added to provide redundant power (i.e., the system
will continue to operate with a single power supply failure).
! Self-contained power supplies that can be easily installed or removed from the back
of the DEU. If optional power system redundancy is installed, the power supply units
are then hot-swappable and can be easily installed or removed from the back of the
DEU without turning the system power off.
! Cooling system redundancy where the system will continue to operate in the event of
a fan failure or having cabinet temperatures approaching the threshold limit, the
redundant fans will switch to high speed.
! SCSI drive bays accessible from the front of the DEU.
! Hot-swap SCSI disk drive backplane; a failed drive can be removed and replaced
with a new drive without system power being turned off (if an optional Redundant
Array of Independent Disks (RAID) controller is installed in the BSU.)