Quantum QXS Series User Manual

Chapter 2: Installing the Chassis
QXS, QXS-3, and QXS-4 Series Drive Chassis Reverse Cabling Illustrations
QX and QXS Setup Guide 76
This cabling method enables the RAID Chassis to maintain access to other Expansion Chassis if any
Expansion Chassis fails or is removed.
l Note the following:
o
The upper RAID Controller I/O Module is connected to the upper Expansion Controller I/O Module.
o
For 12 and 24 drive chassis, Controller A and B are located as indicated in the following diagram.
o
For 56 drive chassis, Controller A is located on the right side of the RAID chassis, and Controller B is
located of the left side of the RAID chassis, as viewed from the back of the chassis.
o
Consult with Quantum technical support when mixing and matching the QXS-3 and QXS-4 Series
expansion chassis.
Figure75:SAS Cabe Connections Between a QXS RAID Chassis with Dual Controller I/O Modules and an Expansion
Chassis
Controller B
Controller A
RAID
Chassis 0
Expansion
Chassis 1
0A
0B
1A
1B
OUT
OUT
IN
IN
Example: Dual-controller Chassis with 3 Drive Expansion Chassis
Cable the RAID Chassis to the Expansion Chassis as shown in the following image.
l Use the reverse cabling method shown in the following image to ensure the highest level of fault
tolerance.
This cabling method enables the RAID Chassis to maintain access to other Expansion Chassis if any
Expansion Chassis fails or is removed.
l Note the following:
o
Controller I/O Module 0A is connected to expansion module 1A, with a chain of connections cascading
down (blue).
o
Controller I/O Module 0B is connected to the lowest expansion module of the last drive chassis, with
connections returning to the RAID chassis, in the opposite direction (green).
o
Consult with Quantum technical support when mixing and matching the QXS-3 and QXS-4 Series
expansion chassis.

Quantum QXS Series Specifications

General

Brand	Quantum
Model	QXS Series
Category	Storage
Language	English