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Chapter 1: Introduction
Chapter 1
Introduction
1.1 Product Overview
1.1.1
Product Introduction
This hardware manual briefly introduces the Galaxy A16F-R2422 FC-4G to
SATA-II storage subsystem shown in Figure 1-1. Through this manual, you
will gain the knowledge of each hardware components, installation
procedures, monitoring functions, connection topologies and hardware
maintenances. The A16F-R2422 subsystem comes with two (2) Fibre-to-
SATA RAID controllers
and provide two (2) 4Gbps
(FC-4G) host channels that
are routed to four (4)
external FC connectors on
two (2) separated host
Figure 1-1: A16F-R2422 Subsystem
connection modules. Two
(2) onboard SATA chips provide sixteen (16) 3Gbps SATA-II drive
channels that can support up to sixteen (16) SATA-II hard drives. The
controller board has a pre-installed 512MB DDR RAM DIMM module and
can support a memory module with a capacity up to 2GB.
A custom ASIC is designed in A24F-R2422 for RAID 6 acceleration.
Galaxy A24F-R2422 RAID subsystem allows two (2) drives failure at the
same time when its configuration is RAID level 6. This generates a higher
redundant level of data availability. On this system, the RAID level 6 and 60
are both ready for end users. Please refer to Fibre to SATA RAID
Subsystem Operation Manual for further description on RAID6.
The metal container in which the controller board is pre-installed is referred
to as the "controller module." The controller module is accessed through the
rear of the A16F-R2422 and is comprised of a PCB board, a rear faceplate,
and a metal canister. A standard battery backup unit (BBU) is preinstalled in
the upper left side of each controller module when viewed from the rear of
the subsystem. The independent BBUs are also accessible and hot
swappable through the rear panel of A16F-R2422.
I/O signals/commands transmitted between the controller and drives at the
front of the subsystem pass through a non-user-serviceable backplane board.
The backplane is connected to a maximum of sixteen (16) hard drives that
you purchase separately and install into the sixteen (16) drive trays that
come with the subsystem. The drive trays, which must be installed in the
Introduction
1-1
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