Bosch DVA-12T Installation Manual download pdf (Page 7)

RAID Subsystem DVA-12T | Installation Manual Introduction | en 7

Bosch Security Systems F.01U.027.798 | V1 | 2006.06

2 Introduction

This hardware manual briefly introduces the DVA 12 T iSCSI-to-SATA-II storage subsystem

shown in Figure 2.1.

2.1 Product Overview

The RAID subsystem comes with two (2) Ethernet host ports capable of large I/O transfers

over iSCSI packets. The subsystems come in a 2U-profile rack-mountable chassis which

houses a RAID controller module featuring complete RAID configuration and maintenance

functionality. The subsystem’s operation is protected by redundant hot-swappable power sup-

plies and cooling fan modules. Designed for high level of availability, all major components are

hot-replaceable including its Li-ION battery, and the RAID-protected disk drives.

The iSCSI storage supports the connection to network initiators compatible with the IETF

iSCSI standard (RFC 3720).

The subsystem facilitates data packaging, using the Internet SCSI (iSCSI) protocols, and

transmission of block I/Os over LANs. The subsystem is ideal for location-independent data

storage, backup, and retrieval. It combines the capabilities and block-level performance of

RAID storage with the high-speed, low-cost, and long-distance Ethernet networking technolo-

gies.

Configured arrays are easily combined with multiple ID/LUNs on host ports, turning massive

capacity into manageable units for data-sharing in a heterogeneous environment.

Fig. 2.1 RAID Subsystem DVA-12T

This high-density subsystem supports up to twelve (12) hot swappable, SATA-II hard drives in

a 2U-profile chassis. The subsystem is powered by the RAID controller board featuring the lat-

est ASIC266 ASIC as the XOR engine and a pre-installed 1 GB DDR RAM DIMM module.

The controller board is housed in a metal canister and is referred to as the “controller mod-

ule.” The controller module is comprised of a PCB board, a rear faceplate, and a metal canis-

ter. The controller module is accessed through the rear of the subsystem with the help of two

hand screws. An battery backup unit (BBU) can be installed in the upper left side of the con-

troller module (when viewed from the rear of the subsystem). The BBU is hot swappable and

is accessed through the rear of the subsystem enclosure.

Two (2) RJ-45 connectors connect the RAID controller to network switches or Ethernet ports

of independent devices. Three (3) hot-swappable cooling modules protect the subsystem

from overheating, and two (2) hot-swappable power supply unit (PSU) modules provide con-

stant power to the subsystem. The modular nature of the subsystem and the easy accessibility

to all major components ensure the ease of the subsystem maintenance.

A maximum of 31 units can be connected to the subsystem.

iSCSI Host Ports

Connectivity: - The iSCSI host ports are capable of 2 GBps Ethernet with full duplex transmis-

sion. Storage volumes are associated with simulated ID/LUNs on the host channels. These vol-

umes then appear as iSCSI targets over the network. The connection of these host ports is

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Bosch DVA-12T Installation Manual Page 7