Straight-Through Cabling - Quantum QX Series Setup Manual

Chapter 2: Installing the Chassis
QXS-6 Series Drive Chassis Cabling Illustrations
Figure 82: Fault-tolerant cabling between a dual-controller RAID chassis and three expansion chassis
RAID
Chassis 0
0 B
Expansion
Chassis 1
1B
Expansion
Chassis 2
2B
Expansion
Chassis 3
3B

Straight-through Cabling

Figure 82 above shows storage components connected using straight-through cabling. Using this method, if
a drive expansion chassis fails, the chassis that follow the failed chassis in the chain are no longer accessible
until the failed chassis is repaired or replaced.
Refer to these diagrams when cabling multiple compatible expansion chassis together with the RAID
chassis with dual-controller I/O modules. Remember that reverse cabling allows any drive expansion
chassis to fail—or be removed—while maintaining access to other expansion chassis.
Dual-controller RAID Chassis with 3 Expansion Chassis
Figure 83 on the next page shows a dual-controller RAID chassis cabled to 3 expansion chassis featuring
dual-expansion I/O modules. Controller I/O module 0A is connected to expansion I/O module 1A, with a
chain of connections cascading down (blue). Controller I/O module 0B is connected to the lower expansion
I/O module (3B), of the last drive expansion chassis, with connections moving in the opposite direction
(green).
Note: Consult with Quantum technical support when mixing and matching the QXS-3 and QXS-4
Series expansion chassis.
QX and QXS Setup Guide
Controller B
0
In
Out
1A
In
Out
2A
In
Out
3A
Controller A
A
Out
In
Out
In
Out
In
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