Chapter 1: Introduction
Product Overview
1-3
ES U16UG4010
-42-0030
-45-0030
-62-0030
-65-0030
Host Channels
(CH0 and CH1)
2 x SCSI-320
2 x SCSI-320
2 x SCSI-320
2 x SCSI-320
Drive Channel
(CH2 and CH3)
2 x SCSI-320
2 x SCSI-320
2 x SCSI-320
2 x SCSI-320
Expansion Channels
(CH4 and CH5)
0
0
2 x SCSI-320
2 x SCSI-320
DIMM Module
256MB
512MB
256MB
512MB
Table 1-1: ES U16U-G4010 Subsystem Model Variations
1.2.3 Enclosure
Chassis
The ES subsystem enclosure is divided into a front and rear section.
NOTE:
Components accessed through the front panel are referred to as “Front Panel
Components” and Components accessed through the rear panel are referred to as
“Rear Panel Components.”
1.2.3.1 Front
Section
The front section of the ES subsystem features a 4 x 4 layout for sixteen 3.5”
SCSI-320 drives and houses a foldable LCD panel.
1.2.3.2 Rear
Section
The rear section of the ES subsystem is accessed through the rear panel and is
reserved for the RAID controller module(s), power supply units (PSU),
cooling fan modules and power switches.
1.2.3.3 Midplane and Driveplane Boards
Integrated driveplane and midplane boards separate the front and rear
sections of the ES subsystem. These PCB boards provide logic level signals
and low voltage power paths. They contain no user-serviceable components.
1.2.4
SCSI-320 Channels
Two of the ES U16U models have four SCSI-320 channels. The other two models have
six SCSI-320 channels. The channels are configured as shown in
Table 1-2
:
