Setup guide

Number of SFP
0.5 m inter-
chassis cables
Number of SFP
transceiver modules
LC
Number of fibre
optic LC cables
Number of XE (EBOD) Expan-
sion Units
Number of
RAID Units
42221
62231
82241
F6412E Controller only
102251
122261
142271
NOTE When using two ATTO cards the first ATTO card is be connected to local storage and the second optional
ATTO card to a SAN and/or archiving device.
NOTE 4 Gb storage configurations require 4 Gb SFP transceivers. A label on 4 Gb SFP transceivers differentiates
them from 2 Gb transceivers (which do not have labels). Mixing 2 Gb SPFP tranceivers with 4 Gb SFP transceivers
may cause unpredictable results.
4-Loop Hardware RAID Configurations
These diagrams illustrate how to cable enclosures in a 4-loop hardware RAID storage configuration.
■ The first illustrates the cabling when using an XR RAID enclosure with F6412E RAID controllers.
■ The second illustrates the cabling for all other 4-loop configurations.
In the diagrams, solid lines represent cabling for the simplest 4-loop configuration and dotted lines represent
cabling for additional enclosures. In 4-loop configurations with two storage assemblies, you can have either
two or four additional enclosures.
The table after the diagrams lists the hardware you need to cable different sizes of this storage configuration.
26 | Chapter 5 Storage Connections